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Research and Development Technical Report ECOM-01604—F

FOR

SHELTER, ELECTRICAL EQUIPMENT

S-250 (XE-2)/G

FINAL REPORT

NOVEMBER 1967

BY

ERNEST Dl PAOLO

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DISTRIBUTION OF THIS DOCUMENT IS UNLIMITED

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UNITED STATES ARMY ELECTRONICS COMMAND • FORT MONMOUTH, NJ.

Reproducer! by fho CLEARINGHOUSE

for Federal Scionlific & Technical Information Springfield Va. 22151

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AVAIL, and

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NOTICES

Disclaimtrs

The findingB in this report are not to be construed as an official Department of the Army position, unless so desig¬ nated by other authorized documents.

The citation of trade names and names of manufacturers in this report is not to be construed as official Government indorsement or approval of commercial products or services referenced herein.

Disposition

Destroy this report when it is no longer needed. Do not return it to the originator*

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Research and Development Technical Report ECOM—01604—F

FOR

SHELTER, ELECTRICAL EQUIPMENT

S-250 (XE-2)/G

FINAL REPORT

NOVEMBER 1967

BV

ERNEST Dl PAOLO

DISTRIBUTION OF THIS DOCUMENT IS UNLIMITED

H COM UNITED STATES ARMY ELECTRONICS COMMAND - FORT MONMOUTH,

Shel

ter, E

lectr

ical

Equip

men

t S

-250 (

XE

-2)

/G

TABLE OF CONTENTS

Page

1. PURPOSE

1.1 CRA IG DES IGN EFFOR T

1.2 PREPARATION OF CRAIG MANUFACTURING DRAWINGS

1. 3 FABRICATION OF ADVANCE DEVELOPMENT MODEL NO. 1

1.4 PREPARATION AND SUBMISSION OF RUNNING SET OF DRAWINGS

1.5 TESTING OF ADVANCE DEVELOPMENT MODEL NO. 1

1. 6 FABRICATION OF TWELVE EACH ADVANCE DEVELOPMENT MODEL NO. 2

1.7 FABRICATION OF FOUR EACH PROCUREMENT MODELS

1. 8 SUBMISSION OF FINAL SET OF DRAWINGS

2. ABSTRACT

3. ‘ REPORTS

4. FACTUAL DATA

5. CONCLUSIONS

6. RECOMMENDATIONS

7. IDENTIFICATION OF KEY PERSONNEL

1

1

2

2

2

2

4

4

4

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FIGURES

FIGURE 1-1 S-250(XE-2)/G

1. Purpose -- The purpose or aim of this contract -was to design, develop, and environmentally test a new shelter employing lightweight construction and having RFI capability of 60 db attenuation in the frequency range from 150 KC to 10, 000 MC, capable of being transported by the newly developed 1-1/4 ton M-561, M-715 and XM-705 vehicles. Additionally, Government format manufacturing drawings were to be prepared and used for the fabrication of procurement models of the S-250(XE-2)/G Shelter.

The tasks, as originally contemplated, were as follows:

a. Craig design effort (layout and initial design).

b. Preparation of Craig manufacturing drawings for one Advance Development Model

c. Fabrication of Advance Development Model No. 1.

d. Preparation and submission of running set of • drawings.

e. Testing of Advance Development Model No. 1.

f. Fabrication of twelve each Advance Development Models (No. 2).

g. Fabrication of four each Procurement Models.

h. Submission of final set of drawings.

1. 1 Craig Design Effort - The initial Craig design effort began on June 30, 1965, calling for a release to manufacturing by July 20, 1965. The design parameters for the S-250(XE-2)/G were contained in Specification SCL-4608A. The design parameters were similar to those contained in SCL 4608 which was the criteria document from which Craig originally designed the S-250 Shelter on Contract No. DA-36-039-AMC-03749(E) in 1963. That shelter utilized a foamed-in-place construction for the core material. Specification SCL-4608A contained three critical design areas. These areas were:

a. Weight of 600 lbs. maximum.

b. RFI Shielding requirement of 60 db attenuation with no protrusions inside the shelter.

1

c. The use of slab polyurethane foam in Lieu of foamed -in-place.

Preparation of Craig Manufacturing Drawings - The Craig design effort employed many of the features developed under Contract No. DA-36-039- AMC-03749(E), thereby aiding the timely release of drawings for the fabrication of Advance Development Model No. 1.

1.3 Fabrication of Advance Development Model No. 1 - On July 21, 1965, Craig submitted a List of hard-to-obtain material items for which ajjproval to procure was requested from the Contracting Officer. This was approved via telegram on August 25, 1965, and the fabrication of the Advance Development Model No. 1 began, calling for the shelter to be ready for testing on October 8, 1965, with the testing to be completed by November 1965.

During this period of performance Modification No. 1 to the contract was made calling for additional mounting provisions in the door end panel of the shelter.

1»4 Preparation and Submission of Running Set of Drawings - The Craig effort to prepare a running set of drawings began on August 24, 1965, calling for submission at the time that the Advance Development Model No. 1 Shelter was submitted for testing (October 8, 1965).

On September 16 and 17, 1965, representatives from Fort Monmouth visited Craig Systems for^the purpose of reviewing progress for the running set of drawings. Due to an unanticipated delay, Craig indicated that only one-half of the drawings would be available on October 8 and the balance would be available on October 14 and 15. Actual shipment of the complete set of running drawings was accomplished on October 21, 1965.

Testing of Advance Development Model No. 1 - Actual testing of the Advance Development Model No. 1 began on October 9, 1965, and was completed on November 18, 1965. The unit was refurbished and ready for shipment on November 24, 1965.

On December 14, 1965, Craig was notified by the Contracting Officer's Technical Representative that the test results of the Advance Development Model No. 1 had been evaluated and that it had been determined that the test results did not sufficiently demonstrate compliance with the technical requirements in the following areas:

a. Structural strength of the knee panels.

b. Wall and floor insert test requirement.

2

Dimensional tolerance c.

d. Weight

As a result of these comments, Craig was informed that Advance Development Model No, 1 was not acceptable and that the unit be resubmitted for testing. This letter also indicated, for information only, that action was being initiated to incorporate three changes having to do with the thermal barriers, ability of the door to withstand additional static and dynamic requirements, and the requirement for flatness and squareness of panels. This letter also informed Craig that these three changes would be incorporated into the Advance Development Model No. 1 Shelter to be resubmitted for testing.

On January 11, 1966, Amendment No. 2 to Specification SCL 4608A was received by Craig Systems. This specification change increased the allowable weight from 600 to 65 0 Lbs. and incorporated the three anticipated changes mentioned above.

On January 21, 1966, Craig Systems submitted its response to the changes noted in Amendment No. 2 to SCL 4608A.

On January 26, 1966, a meeting was held at Fort Monmouth with representatives of Craig Systems, DCASR-Boston, and USAEC personnel to discuss the status of the contract and in particular, Craig^ proposal of January 21, 1966. As a result of this meeting, Craig was requested to submit a proposal on or before 2 February 1966 encompassing the agreements reached during the meeting at Fort Monmouth on 26 January 1966.

As a result of the several meetings and negotiations, Modification No. 4 to the contract was issued. This modification modified the technical and delivery requirements of the contract and in summary, provided for the following:

a. Acceptance by Fort Monmouth of Advance Development Model No. 1 as submitted.

b. Preparation of a new Advance Development Model containing all the changes previously discussed. The new Advance Development Model would.be known as Item 2a. This unit would be subjected to a complete test program as had been conducted on Advance Development Model No. 1.

The balance of 11 units of Item 2 would now be known as Advance Development Models and would not be subjected to a complete test program. The technical requirements were also modified as a result of the negotiations.

The delivery schedule was revised calling for the new Advance Development Model to be completely tested by 20 June 1966.

During the manufacture of this unit, a change in the wheel-well dimensions of the shelter was made and Modification No. 6 was issued revising the width of-the shelter and increasing the allowable weight to 670 Lbs. Since some of the panels were obsoleted as a result of this change it was necessary to fabricate additional parts and revise the delivery of the Advance Development Model to 25 September 1966*

The new Advance Development Model was subjected to testing beginning 20 July 1966 through August 31, 1966, with the COTR informing Craig that the Advance Development Model (2a) was acceptable and that authorization to begin fabrication of Item 2b was granted.

1*6 Fabrication of Twelve Each Advance Development Model (No. 2) - Based on Modification No. 4 to the Contract the twelve Advance Development Models were changed to two separate items, Item 2a-Advance Development Model (tested unit) and eleven each Advance Development Models. The fabrication of the eleven units known as Item 2b was authorized and the units wer.e released to .manufacturing to be manufactured in accordance with running set of drawings.

( r* !• 7 Fabrication of Four Each Procurement Models - Based on the

acceptance of Item 2b, authorization was granted to fabricate the four procurement models which were fabricated in accordance with the r unning set of drawings. One of these four units was subjected to a limited testing program which proved satisfactory after a retest of the Drop Test portion of the testing program.

1.8 Submission of Final Set of Drawings - The final set of drawings were submitted on 30 June 1967, completing the Craig effort under Contract No. DA-2Ö-043-AMC-01604(E).

2. Abstract - Electrical Equipment Shelter S-250(XE-2)/G is an aluminum lightweight shelter fabricated of aluminum outer and inner skins with polyurethane slab insulation bonded to the aluminum skin to form.a sandwich panel approximately

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1-1/2" thick. Aluminum hat members within the panels provide mounting for equipment. The door is provided with a door within a door. The inner door provides a means of escape from the inside.

The S-25G Shelter weighs 670 lbs. and has a payload capacity of 1900 lbs. when transported by 1-1/4 ton vehicles.

The development of the S-250 Shelter was accomplished under Contract No. DA-28-043-AMC-0l604(E) issued on 30 June 1965. Under this contract an Advance Development Model was designed and successfully tested. The configuration of this accepted unit was the basis for the preparation of a complete set of manufacturing drawings suitable for reprocurement. These drawings were further used for the actual fabrication of procurement models. The final set of drawings was submitted to USAEC on 30 June 1967.

The major accomplishments under this development contract were the successful design of a light weight, high strength-to-weight ratio, RF shielded shelter capable of withstanding worldwide environmental conditions. The S-250 Shelter was type clássified STD "A" on 27 April 1966.

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3. Reports - There foUows herein Craig Test Report No. 010-B describing the testing and results of testing conducted on the Advance Development Model S-250(XE-2)/G Shelter, Contract Item 2a.

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Systems, Inc. LAWMWOX. MAM. '

QUALITY CONTROL DEPARTMENT

TUST RI PORT KO. 010-1

Work Order 0010

nmtoppcTio»

Taatlnf of tho 8-230 oholtor At Craig Ofotoao'

facility bogan July 25, 1960 and ma completad Aue oat 30, 1966.

Toot im vae porfonaod on a sholtor producad under Item 2a of

Contract DA-26-043-1)1001604(1).

Vitneaainc either part of all of the teata mare:

1. Joaeph Roma, Project Knfineer, RU> Dlracterata, D8Á1C0M

ÍÍ.

2. Kan laleon, Prod, fc Procurement Directorate, UBAECOM, Shelter Branch

3. Valter Andaraea, QAR-DCA8R, Beaton

4. Fred Chriatopher, QAR-DCA8R, Boatao

5. Robert 8. Smith, Director of Quality Control, Craig Byatema Corporation

6. Richard H. Coraetti, Project Xngineer, Craig lyatema

7. Webeter Brown, Teat Kngineer, Craig Byatema

All applicable charte, grapha, and data aheata are

attached to the Individual teat report that they cover. Included

la an ladax of the individual teata.

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Test Mu*

Adhesion Shear Strength Isst

Vatsr Absorption Tost

Cylinder Inpaet Tost

Tonsilo Tost (Bpoclnon Tests)

Moisture Resistance Test

Beat Transfer Tost

High Temperature Test

Low Temperature Test

RallrjMkd Transport

Bllng Drop

Skid Bearing Test

Three-Point Support

Flat k Rotational Drop Tests

Towing Test

Lifting Test

Deep Fording Test

Roof Test

Doer Test

Lifting Xyea Test

Tewing lyes Test

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r*l«lDK Steps Tsst

Wall Insert Tsst

riser Insert Test

Lift and Tiedewn Assembly Test

Watertightaess Test

Shialding Effectiveness Test

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LAWKKNCr, MAM.


Te»t Repert #010-6-1

TITLE ; Adhesion Shear Strength Test 8-250(XE-2)/G Shelter - Ites Sa Contract DA-28-043-AMC-01604(K) Performed August 4, 1966

PURPOSEî To tbst ahelter design,

APPLICABLE SPECIFICATIOH: SCL-4608A, Amend. #2, dated Dec. 9, 1065

BigPIRimNT: Specification Par»|t*ph 4.1.1 A typical panel section, one (1) foot square shall be provided In order that the shear strength test can be performed. The test shall be performed by placing the panel section In a tensile testing machine with one of the aluminum skins attached to one (1) set of testing machine Jams and the other skin attached to the other set of jaws. The bonding area between the outer skin and the core material shall have n minimum shear strength of 10 pal. The test shall be to destruction, with the rate of application of load constant at one (1) Inch per minute maximum. The plane of failure shall be entirely within the core material,

EQUIPMENT REQUIRED AMP PSKD:

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Craig Test Fixtures Dilloq Dynamometer 0 to 5,000 pounds

Model L, Serial No. ÀN3579 Date of Calibration - Aug. 1, 1966

TEST RESULTS; Specimen Dimensions •' Length - 12 inches

Width - 12 inches Thickness - 1.5 inches Shear Area - 144 sq. in. Load at Failure - 1475 lbs. Shear Strength (psi) - 10.24

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Sj»temsflnc. LAWItDfOB, KAM.


T«»t Eaport ffOlft-B-1

Page 2 Of 2

Th» »p»o1b»d Mt th» r»«nir»Mnt of this t»»t.

R»p»rt»d by: V. J. Brower

Afpr»v»d:

Quality C»ntr»l

Eagiaa«rlDg

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System s, Inc. LAWKINCK, KAU.


TKKt »«port #010-1-2

Tatar Absorption Tent 8~250(XK-2)/G Bholter - Item 2a Contract DA-28-043-AMC-01S04(I) Parfomod July 28, 19M thraufh Aug. 2, 1966

To taat sheltar design.

Paga 1 af 1

APPL1CABL» BPECiriCATIOH: iCL-4608A, Attend. #2, dated Dec. 9, 1965

REqcntKKgWT: Specification Paragraph 4.1.2

A saaple of core Material one-foot aguara and three inchea thick shall be Telghed to within .01 pounds and than shall be subjected to 98% relative huaidlty for 120 heurs. At the completion of this teat, the core ttaterlal shall

ba T***»gMed aod shall not have gained aere thaif 0,1 pounds of water.

5. gqPJPMBWT REQUIRED Craig Laboratory Humidity Chamber Dry and Wet Bulb Thermometers Scales: Harvard Trip balance by Ohaus Scale Corp. Calibrated 7/15/86

6. TEST RESULTS:

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Date Exposure Started - 7/28/66, 8:20 a.m. Initial Specimen Telght - 240.5 grms Date ExpMure Ended - 8/2/66 Final Specimen Weight - 284.0 grams Total Exposure (hours) - 120 Moisture Absorption - .096 lbs.

Attached are checks made on R.H. during the test.

7. CONCLUSI0WB: The test specimen met the requirement of this test>.

Reported by: W. J. Bgown 'Öl*****!—-

approved by: Quality Control

Engineering

i 12

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Systems, Inc. LAWREtiCI. MASS.


Temt Report #010-B-3

1. TITLE: Cylinder Impact Test 8-250(X,K-2)/G Shelter - Item 2tt Contrect DA~28-043-AMC-01«04(I) Performed Au*uet 10, 1966

PDMH>SE: To test shelter design.

3. APPLICABLE SPICIMCATIOK: SCL-4S08A, Amend. #2, dsted Dec. 9, ,965

4< EZQqUUIgKT: (Specification Paragraph 4.1.3) A 24~inch square specimen of both the mall and roof construction, having no support from internal structural member, shall be subjected to impact as follows: A 70-pound steel cylinder three ipch.es in diameter and hesisphsrieal at one end shall be dropped vertically 30 inches so that the hemis¬ pherical end of the weight strikes the center of the outer skin of the section on a horizontal plane The specimen shall be supported along its four edges by a framework backed by concrete . The framn shall be made of four pieces of 2 inch by 4 inch Nominal) lumber, rigidly bolted together to form a square 24 inches on a side (outside disensión), 4 inches (nominal) high, so that the frame rests on the 2 inch (nominal) faces. The panel specimens shall have the four edge surfaces bound with skin material and shall be bolted to the frame with a minimum of two 1/4 inch diameter bolts per edge.

5. BQPIPMIBT: Craig Test Frame Craig Temt Structure (sling and instant release hook) Steel Cylinder (70 pounds Including 3 in. dia.

polished hemispherical nose piece)

I. TEST KK8VLT8:

Weight of ram - 70 founds Drep distance - 30 jaches

Systems, Inc. ■ LAWRENCE, HA38.


Test Report <l*010-B-4

1. TITLE : Tensile Test (Specimen Tests) S-250(XE-2)/G Shelter - Ite» 2a Contract DA-28-043-AMC-01604(E) Performed August 15, 1966

2. POTPOSE: To t^st shelter design.

Page 1 of 2 'it;-!'!'

3. APPLICABLE SPECIFICATION! SCL-4608A; Amend. #2, dated Dec, 9, 1965

4. REQUIREMENT: (Specification Paragraph 4,1.4)

If, in the construction of the shelter, bonding is employed to join skins to other skins, to structural members, or to thermal barriers, this test shall be performed. A sample lap joint consisting of two one-inch strips of aluminum (typical of those gauges used as skins) , overlapped one-half inch shall be prepared, bonded together with the same bonding material, of the same propor¬ tions, as that employed in the construction of the shelter. This sample shall be tested in a tensile testing machine. The test shall be performed at an ambient temperature of 68° ± 2°F. The adhesive shall have a minimum shear strength of the fully- cured adhesive of 1400 psi.

5. EQUIPMENT REQUIRED:

1, Detroit Testing Machine Model PI' Serial No. 1711 Date of Calibration - 7/11/66

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Taat Report #010-8-4

RESULTS :

Adhesiva Identification: 1C30820/V 140 Curing Condition: Similar to panels

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Baaple Description: As required Conditioning: 14 days at R.T.

Load at Bpeclaen Mo Failure Lbs. Test Temp. F,

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720 850 800 800 850

R.T. 75 fl

Ava, - 804 PSI - 1608

t 7. CONCLUSIOW :

The specimen met the requirements of this test.

Reported by: W. J. Brown

Approved by

Quality Control /f?XXSfr

Engineering Jfy. li&inÉL.4

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Systemsjnc. LAWRENCE. MASS.


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Test Report #010-B-5

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1. TITLE Moisture Resistance Test

S-250(XE-2)/G Shelter - Item 2a

Contract DA-28-043-AMC-01604(E)

Performed July 25, 1966 through August 6, 1966

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2. PURP08K: To test shelter design. ÉiS:

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3. APPLICABLE SPECIFICATION: SCL-460BA, Amend. ^2, dated Dec, 9, 1965

MIL-STD-170(Sig C) dated 12/20/54 !¡l¡ÍsllfÍPÍl

Dry at 130° ± 5°F for 24 hours. b.

4. REQUIREMENT : (Specification Paragraph 4.3.2.2)

Moisture Resistance - a.

Condition at 77° ± 5°F and 40 to 50 percent

relative humidity for 24 hours.

Subject to continuous cycling.for five 48-hour

cycles. Temperature, relative humidity, and

period of time for each portion of the cycle shall

conform to M1L-STD-170.

d. After cycling has been completed, condition the

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equipment for 24 hrs. at 770±5°F and 40 to 60

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EQUIPMENT REQUIRED ANI ) USED

percent relative humidity. There shall be no visible

ge or malfunction of doors, latches, and hinges at the completion of this Í

Craig Environmental Test Chamber #1774 (Front

section only used. Rear section was partitioned

and sealed off from the front section.)

Bristol Controller Model TE-2T500FFFS2-1A

Calibration date 7/15/66.

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6, PROCEDURE :

6.1 6.1.1

Moisture Resistance

6.1.2

Condition the equipment for 24 hrs. at room

ambient conditions .

Install the shelter in Test Chamber #1774 and

subject it to five continuous 48 hour cycles. Temperature, relative humidity, and period of

time for each portion of the cycle shall conform

to MIL-STD-170.

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6.1.3 After cycling has been completed, condition the equipment for 24 hours at room ambient conditions.

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C€»rCUMI<at: Th* shelter set the requirements ef this test.

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Page 2 of 2

Systems.lnc. LAWSSNCC. MAU.

Test Report No. 010-B-S

T_»BT RISPLTH : ‘Shelter doors were ope ratea, panels were sounded and visual tests were made following each 48 hour cycle and at the end of the test.

There was no evidence of damage to the shelter or malfunction of. the doors, latches, hinges, hardware, etc.

Data sheets and charts #01109, as provided by the Bristol Controller Recording Equipment, are attached A time-lag of operatlens, nates, etc.'was also kafgt.

Reported by: W. J. Brown

Appreved by:

¿f.m Quality Control

Engineering ,-/¾ UÆÎL

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ATTACHMENT TEST REPORT #010-B~5

Environ««nt*l Test (Moisture Resistance)

Date Time

7/25/66 9 a.m.

" 10 a.m.

" 11:30 a.m.

11:50 a.m. 12 p.m. 12:45 p.m. 2:10 p.m. 3:15 p.m. 4 p.m. 4:30 p.m.

7/26/66 8:15 a.m.

9 a.m. 10 a.m. 12:30 p.m. 3:40 p.m, 4:20 p.m. 4:25 p.m.

7/27/66 8:05 a.m.

8:10 a.m. 8:25 a.m. 8:30 a.m. 10:10 a.m. 11 a.m. 1:30 p.m. 3:10 p.m. 4:15 p.m. 4:17°p.m.

7/28/66 8:05 a.m. " 8:10 a.m. " 8:15 a.m. " 8:30 a.m. " 9:30 a.m. " 11 a.m. . " 12:50 p.m.

Remarks

Test started. (COg tank read 11,200#) Distilled water bottle filled. Dry bulb reading 94°F. Wet bulb reading 93°F. Dry bulb reading 118°F, Wet bulb reading 117°F. Heat #2 toggle switch put on. Dry bulb 126°F. Wet bulb 125°F. Dry bulb 138°F. Wet bulb 136°F. Dry bulb 146°F . Wet bulb 143°F . Dry bulb 145°F. Wet bulb 142°F. Dry bulb 146°F. Wet bulb 142°F. Auto, heat #1 and #2 switches off.

Check showed chamber operated OK during night, (changed chart)

Checked steam boiler (operating OK). Checked C02 (vol. 10,200# pressure 295) - OK Dry bulb 83°F. Wet bulb 81°F. Dry bulb 82^. Wet bulb 81°F. Dry bulb 82°F. Wet bulb 81°F . Dry bulb 64°F . Wet bulb 63°F . Auto, heat #1 put on. Dry bulb 64°F. Wet bulb 63°F.

Night operation OK, changed chart and put auto, heat switch #2 on. Checked steam boiler, was OK. Checked C02 (vol. 9400#) pressure 290 - OK. Dry bulb 144°F. Wet bulb 141°E Dry bulb 144°F . Wet bulb 141°F . Cramer Min. Meter Reading - 290,4 Auto, heat switches #1 and #2 turned off Dry bulb 117°F. Wet bulb 114°F. Dry bulb 100°F. Wet bulb 98°F. C02 check OK; boiler check OK.

Boiler cfieck OK.

CO2 check OK. (Vol. 8,000#. Pressure 295 - OK Chart changed, (Test chamber operating OK) Cramer Min. Meter Reading 488.8 Dry bulb 81°F. Wet bulb 79°F. Dry bulb 81°F. Wet bulb 80°F. Entered chamber and checked shelter. (Sounding tests and straight edge tests on panels) All tests OK.

29

4:25 p.m* Auto, heat switch #1 put on.

7/20/66 8:10 â.m. Auto, best switch #2 put on.

8:11 a.ra. Chart changed, (Test chamber operating OK) ” ®‘«IS a.m. Dry bulb 143°F. Wet bulb 141°F. " 8:45 a.m. C02 check CMC. (Vol. 7200#) Pressure 290 - OK. " 10:30 a.m. Dry bulb 143°F. Wet bulb 140°F.

■" 12:45 p.ra. Resealed dry and wet bulb chamber. 1:30 p.m. Auto, heat switches #1 and #2 turned off.

” 2:45 p.m. Dry bulb 124°F. Wot bulb 121°F. " 2:45 p.m. Cramer Min. Meter Reading 609.2 " 3:30 p.m. Boiler check OK. " 4:25 p.m. Dry bulb 98¾1. Wet bulb 95°F.

7/30/66 8:10 a.m, (Sat.)

" 8:20 a.m. " 3:25 a.m. " 8:30 a.m. " 8:35 a.m. " 8:40 a.m. " 9:45 a.m. " 7:15 p.m. " 7:45 p.m.

7:45 p.m.

Changed chart. Test chamber operated OK during the night. Boiler check OK. COg check OK (Vol. 5850, pressure 300) Cramer Min. Meter Reading 801.0 Opened chamber and checked shelter - OK. Dry bulb 82°F. Wet bulb 81°F. Dry bulb 81°F. Wet bulb 80°F. Dry bulb 63°F. Wet bulb 62°F. Auto, heat switch #1 turned on. Checked boiler, C02 tank - Both OK.

7/31/66 7:00 a.m. (Sun.) 7:05 a.m.

to " 7:15 a.m. " 7:20 a.m. " 7:20 a.m.

7:20 a.m.

8/1/66 8:20 a.m.

Removed chart. Shut down test at end of 3rd cycle. Shut off steam boiler, C02 tank and opened chamber and shelter doors. Cramer Min. Meter Reading 924.2 C02 tank showed vol. 5,000, pressure 295. Immediate visual inspection of shelter showed: 1. No moisture, condensate inside, no bulging

of panel skins inside or outside. Coin test sounded good - OK.

Rechecked shelter condition after 24 hours of room conditioning. Found it to be OK. Interior of panels and exterior had not been harmed.

3

Pate Time

ß/2/66 8:05 a.m. M 8:10 a.m. '* 8:25 a.m. M 8:35 a.m.

M 8:40 a.m.

8:55 a.m. 9:20 a.m. 9:22 a.m.

10:55 a.m. 12:30 p.m. 1:20 p.m. 3:30 p.m. 8 p.m.

Remark3

Boiler started. C09 valve turned on. Vol 5,000#, Pressure 295 Steam line bled of condensate. Steam valve to chamber opened. 1 turn plus 1 notch on wheel. Controllers turned on, circulating fan put on, new chart on and 4th cycle of test started. Checked wet bulb for saturation of cotton sleeve. Auto, heat 1 and C02 A1 toggle switches put in on position. Closed shelter doors and test chamber doors prior to starting test. Cramer Min. Meter Reading - 925.5 Test proceeding satisfactory. Dry bulb 93°F. Wet bulb 92°F. D ry bulb 117°F. Wet bylb 116°F. Heat #2 toggle switch put on. Dry bulb 144°F. Wet bulb 141°F. Dry bulb 145°F. Wet bulb 141°F . Auto, heat #1 and heat #2 switches off.

8/3/66 8 a.m. " 8:15 a.m.

" 8:50 a.m.

9:35 a.m.

11:00 a.m. 12:45 p.m. 2:30 p.m. ,3:30 p.m. 4:10 p.m.

Changed chart. Dry bulb 81°F. Wet bulb 79°F. Checked boiler and C02 supply, both OK. C02 Vol. 3850, Pressure 295 Opened chamber and checked shelter. Coin and straight edge check OK. Visually shelter was OK all over. Opened tumidity control box and checked saturation of cotton sleeve. Dry bulb 82°F. Wet bulb 81°F. Dry bulb 81°F. Wet bulb 81°F. Dry bulb 81°F. Wet bulb 80°F. Cramer Min. Meter Reading 1116 Dry bulb 81°F. Wet bulb 81°F.

8/4/66 8:05 a.m. " 8:15 a.m.

9:25 a.m. 10:50 a.m. 11:20 a.m. 2:00 p.m. 4:00 p.m.

Auto, heat #1 toggle switch turned on. Checked boiler and C02 supply OK. C02 tank filled this a.m. Reading 12,100# Cramer Min. Meter Reading 1225.8 Dry bulb 98°F. Wet bulb 97°F. Dry bulb 120°F. Wet bulb IIS^F. Heat #2 toggle switch put on. Dry bulb 143°F. Wet bulb 140°F. Dry bulb 144°F. Wet bulb 141°F. Heat #2 toggle switch turned off.

31

Date Time Remarks

8/5/66 8:05 a.m. " 8:10 a.m.

” 8:50 a.m. " 11:00 a.m. " 1:00 p.m. " 3:30 p.m.

Auto, heat #1 toggle switch off. Checked boiler and C00 supply - ok. COg Vol. 11^200# Pressure 290 Dry bulb 82°P. Wet bulb 80°F. Dry bulb 81°F. Wet bulb 79°F. Cramer Min. Meter Reading 1402.0 Dry bulb 83°F. Wet bulb 81®F.

8/6/66 8:00 a.m. " 8:05 a.m.

" 8:10 a.m. " 8:15 a.m.

Dry bulb 83°F. Wet bulb 81°F.

Shut test down and opened chamber and shelter doors.

C02 Vol. 10,300#, Pressure 295 Shelter inspected.

Coin sound test OK; straight edge test OK. Moisture inside shelter - None Cramer Min. Meter Reading - 1520.2

32

of Ä

Systems, Inc. LAWKKNCX, MAU.


Teat Report #010-B-6

1. TITLE: Heat Transfer Teat

B-250(XE-2)/G Shelter - Itea 2a Contract DA-28-043-AilC-01604(E) Perfomed August 8, 1966

2. PURPOSE : To tost shelter design.

3* APPLICABLE SPECIFICATION: SCL-4608A, Amend. #2 dated Dec. 9, 1905

4. REQUIREMENT : (Specificatlon Paragraph 4.3.2.3)

Heat Transfer - The shelter shall be placed in a temperature controlled room which shall maintain a constant temperature environment of -40°F outside the shelter. An electrical heat source which has sufficient power to maintain a stabilized temperature inside the shelter of not less than 100°F above the outside temperature shall be placed in the shelter. Air circulation shall be sufficient to provide tempeia ture uniformities inside and outside the shelter within 5°Fi as measured by thermocouples placed aa specified by the COTR. Under the conditions, the electrical power input shall equal the heat loss, and the average inside and outside temperatures and the inside area of the shelter shall be used in calculating the overall coefficient of heat transfer which shall be no greater than 0.40 BTU per hour per square foot per degree Fahrenheit.

5. EQUIPMENT REQUIRED AND USED:

‘ Craig Environmental Test Chamber #1774 (front section only, partitioned off from rear section) Bristol Controller (Model TE-2T500FFFS2-1A) Calibration dated 7/15/66' Leads and Northrup Double Range

Potentiometer Indicator Model 8657-C Craig Theraocuple Switch Panel 12 Copper-Constantan Thermocouples 2 heaters - Chromalo* Model #6 (3000 watts each) Kilowattmeter - Weston Model 432

Percentage timer - Cramer Model 610E-60S Craig Wiring Harness and Control Panel

Paffe 2 of 3

LAWMMCE. MAU.


Toat loport »010-B-g

PiOdPimi;

6.2 Haat Tranafar Taat 6.2.1 Inatall the sbaltar in Test Chaaber #1774 and

connact tha following aquApuant: (1) Locata aiz coppar constantan theraocouplaa

incida tha aheltar on tha aide walls a ainiaua of 12" froa any aurface ae ahown in Figure 2.

(2) Locata four coppar constantan thermocouples outaida tha ahalter on tha side walla a minimum of 6" froa any surface as shown in Figura 2.

(3) Wire the abova theraocuples to the switch '' panal and connect the switch panel to the potentiometer indicator. An icewater bath may be used for the reference junction.

(4) Install two Chroaalox heaters inside shelter and connect with wiring harness through switch panel and kilowattmeter to 120 volt AC supply as ahown in Figure 1.

(5) Calculate Inside area of shelter and record on data sheet page 11.

(6) Insulate and seal all opsnings to prevent circulation of air froa inside to outside of the shelter.

6.2.2 Reduce chamber temperature to -40°F in three hours. During and after pulldown, monitor temperature inside shelter and maintain at 65°F.

6.2.3 Maintain chamber temperature at -40°F and shelter inside temperature at 65°F until no further change in electrical power input is required to produce these conditions.

6.2.4 Take four temperature readings at 15 miaute intervals and record on data sheet. Record the power input at each Interval.

6.2.5 Average the recorded temperatures and calculate the Vfactor in the space provided.

TfT RISULTB ;

V s 0.314 Btu/Mr/V/rt3

Pftfe 3 of 3

Systems,Inc. LAWMNC«, KAM.


Test Roport fOJUMMI

ÇOMCLOSIOW i Th« «h»ltor M«t th* roquirooent* of this tsst.

Legend:

Ü - Oversll h*at trsnsfer factoie ln Btu/Är/Sq. Ft/°F W - Power Input in Watts

.293 - Conversión Factor in Watt hours AT - Teape.rature Differential in *F

A - Inside area of shelter in oq. ft.

Data sheets and chart #01109, as provided by the Bristol Controller Recording Equipment, are attached along with diagrasua showing the heater and therao- r.ouplo junction locations.

Roportod by: W. J. Brown

Qusllty Control

Engineering

35

Crà\$ ETS 276 FIGURE 1

HEATER WIRING DIAGRAM

FOR

HEAT TRANSFER TEST

Switchbox 3 KW Heaters

% Timer Cramer Model 61ÛE-60S

Cr¿\a tS¿18 FIoURE l

THERMOCOUPLE LOCATIONS lor

HEAT TRANSFER TEST

©

©

i if a 2.

©

© “Vû

1 29 r-©

©■

©

©

1¾¾

t oO

©

Õ 0

i)A7UH

HEAT TRANSFER TEST

TEST DATA SHEET NO. 1

Date Time

TEMPERATURES RECORDED

OUTSIDE 17:45 18:00 18;15 18:30

Bristol -37

Thermo 7 -41

Couples 8 -42

9 -45

10 -45

Total Average

173 -43

to

-41

-41

-41

-41

164 -41

-40

-42

-42

-42

-42

168 -42

-39

-39

-39

-39

156 -39

Total Average 165 -41

Total Average

66 64 65 65 65 64.5

389.5 64.9

INSIDE

68 64 66 66 66 66 39.6 66.0

64 61 64 64 64 64 38. 1 63.5

66 64 65.5 65.5 65.5 65.5

392.0 65.3

Tota 259.7

Average 64.9

Watts

TEMPERATURE DIFFERENTIAL=

2140 2140 2140 2140 8560 2140

U = _W_ .293 X A X T

U = _2140_ .293 X 220.x 105.9

U = 0.314

U = Overall heat transfer factor in BTU/HR/°F/FT2 W = Power Input In Watts .293 = Conversion factor in watt hours

T= Temperature differential in F A = Area óf shelter in Ft2

38

SOLAR RADIATION CHECK

DATA SHEET NO. 2

Measurement No.

1

2

3

j

6

Total

Average

Millivolts

16.0

16. 2

14. 8

13. 8

11.5

12.9

85.2

14.2 X 25.42 =

Location

Under lamp

Under lamp

Under lamp - outer bank

Between lamps

Between lamps

Between lamps

360. 96 BTU/Hr/Ft2

39

! Fil i’- "'HT!'¡ R''"

,-,-,:-

WIND VELOCITY CHECK

DATA SHEET NO. 3

Measurement No# Ft/Min

1 655

2 ** 665

3 500

Total 1820

Average 606, 6

Shall not exceed 616 ft/min (7 MPH)

40

iwinwmiiiMiiwniiiwitWKJwÉmt1

MID

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43

■VK’ri Hi’ R.Tr Hi-nrTPPîwr’

LA WREN CK« MAM.


TEST REPORT #010-B-7

X. TITLE : High Température Test 8-250(XE-2)/G Shelter - Item 2a Contract DA-28-043-AJfC-01604(E) P«riora«d August 10, 1966 through August 16, 1966

2. PMtPOeS: To test shelter design.

APPkECABlil SPKCiriCATIW: SCL-4608A, Amend. #2 dated Dec 9, 1965 MIli-STD-169(Sig C)

4. RSQUIEIMAKT: (Specification Paragraph 4.3.2.4) High Temperature - The shelter, with doors closed, shall be placed in a chamber with air maintained at 1201¾1 to 125°F e The air shall be recirculated with a velocity not exceeding seven miles per hour in the vicinity of the shelter. After the outside shelter skin has stabilized between 120^ and 125°F, the doors and their hinges and latches shall * operate freely. The full solar load shall then be applied to the roof. If the end or side walls are constructed of different composition, type, or density of core material than the roof, each different wall shall also be subjected to the full solar load simultaneously with the roof or in a separate cycling. The solar load shall be applied as rapidly as possible using at least twenty-eight number 1000T3, 230 volt bulbs (as made by G.E., Sylvania, or equal) per panel. The bulbs shall be arranged in four rows of seven bulbs each, or more as required, and shall operate within 10 percent of their rated voltage. The solar load shall be applied a period of four hours after all portions of the outside skin of the panel being tested have reached a minimum temperature of 195°F. After completion of the four-hour solar load, the air- temperature shall be raised so that all portions of the Inside skin shall be between 160°F to 165°r. The shelter temperature shall then ’ ~~reduced as rapidly as possible to 77° ± 10°f. "

The above cycle shall be repeated three times. There shall be no core growth, délamination, buckling, or deterioration of structural strength during or as a result of the teiting.

44'

Systems, Inc. UiWRCfC*. HAH.


TEST REPORT #010-8-7

5. EQÜIPMIHT REQUIRED AND PBED:

Craig EnvlroiuMntal Test Chamber #1774 (Front aad rear dividing partition and seal removed aa entire chamber is required for High Temperature Test. Divider is re-installed for Lov Temperature Teat.) Calibration dated 7/15/66, Lead and Northrup Double Range Potentiometer Indicator Model 8657-C Craig Thermocouple Switch Panel 12 Copper-Conatantan Thermocouples Pyrheliometer, Eppley 50 Junction Craig teat stand for mounting Eppley cell

5" Biram Davis Anenemeter-Super-Sensitive Hind Gauge Craig Hiring Harness and Control Panel

6. PROCEDURE:

6.1 High Temperature Test

6.1.1. Thermocouple locations. Locate 10 thermocouples on the ahslter roof aa shown in Figure 3. Nine thermocouples to be attached to the outside akin and one to be located in the free air six inches above the roof in the geometric center and shielded from radiation. Locate two thermocouples on the inside skin on the side walls as shown.

6.1.2 Solar Loading - The solar source shall be twenty-eight 1000-T3 lamps spaced proportionately over an area of 8' X 12'. Prior to running the first cycle, the solar intensity must be checked using the following procedure:

(1) Locate the 50 junction Eppley cell with the detecting alaaant at the height of the object undergoing teat.

(2) Record readings in table as follows: a. Three each directly under lamps of which one

shall be on aa, outer bank. b. Three each between lamps.

c. Average the readings in the apace provided. Results shall be within 10* of 360 Btu/fcr/; c*.

(3) Place shelter in chamber frith chamber doors closed. Check wind velocity as follows and record results

in table.

45 .

♦

s, Inc. LAWRENCE, MA33.



6. PROCEDURE ; (cont'd)

a. Locate anemometer In three random positions on the shelter roof and measure irlnd velocity for 60 seconds in each position.

b. Average the readings in the space provided. Results shall not exceed 616 Ft/min (7 mph).

6.1.3 Solar exposure And high temperature. Perform the solar exposure and high temperature tests as follows : (1) Place the shelter in the rear of the test chamber

clear of the solar radiation with the doors closed and the floor drain plug removed. Raisechamber temperature to 120°F to 125°F in less than four hrs.

(2) Maintain in the above condition until the shelter outside roof skin temperature has stabilized at 120°F to 125°F. After stabilization is reached, check that doors and latches operate freely.

(3) Move shelter to solar exposure location and immediately apply the full solar load of 360 Btu/Hr/Ft2 with a wind velocity not exceeding 7 mph. Maintain this condition for four hours after the roof skin temperature has stabilized. Ambient temperature inside chamber to be 120°F to 125°F. The free air thermocouple located sifc inches above the roof shall be the determinant for chamber ambient temperature regulation.

(4) At the conclusion of the four hour period and while 1 at 120°F to 125°F, return the shelter to the rear of

the chamber clear of the solar radiation. (5) Raise chamber ambient temperature to 160°F to 165°F

in less than four hours and maintain in this condition until the Inside skin temperature has stabilized.

(6) After the above condition has been satisfied, open the chamber door and move the shelter to ambient room conditions as quickly as pos£>..ble and operate shelter doors.

(7) Maintain at room ambient conditions for a minimum of four hours.

(8) Repeat steps 1 through 7 until three cycles have been completed.

jË-ôbat Systems, Inc.

7. TEST RESULTS:

8. CONCLUSION:



Thrae cycles parfonwd of High Te»perftture Tast. Checks aada during the cycling and following each test revealed no shelter daaage such as delanlna- tlon of core to skin aaterial, buckling, or deterioration of the' structural strength of the shelter as a result of these tests. The doors, latches, hinges, hardware, etc. showed no malfunction, all operating freely at each teat.

The shelter set the requirements of these tests.

Data sheets, charts #01109, notes, etc* as records of these tests are attached. Also included is the themocouple Junction location diagram, the Bolar Radiation Check and the Wind Velocity Check.

7. TEST RESULTS:

8. CONCLUSION:

47

FIGURE 3

*¡

THERMOCOUPLE LOCATIONS for

HIGH TEMPERATURE TEST

T

+-©

DATUM

Notes: Thermocouples #16 and # 8 to be attached to inner skin on side walls as shown 40 inches from floor«, Thermocouple #4 to be located in free air shielded from radiatoxi. All others attached to outside skin on roof as shown.

I

48

EHVIRONMENTAL TEST DATA SH

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ENVIRONMENTAL TEST DATA SHEET

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uiwaaaicB. uaeo. OUALITY CONTROL DEPARTMENT

. TEST gjgpQiay #oio-b»®

*. TITÏÆ i Low Témpora tus» Toot 8-3B0<XB-s;/5 SlMlter - Itea 2a Coatmct M-28“043~AMC-01604 (B) Poriornod Auguot 10, 1966 throupîî August 16, 1Ü6

2. PTOPOflE: To toot oholtor donlgn.

3. APPLICABLE SPBCSFICATIOiT: SCL-4308&, Aaood. §2 d»t#i Dm. 9, 19®!* ... " MlL-STD>169(Sia; C)

1 - RF,qnnilMBOT; (Specification Paragraph 4.3.2,5) Low Tomporature - Tho closed oholtor «hall be subjected to throe óyeles of tho low tnsperator® portion of tJIL~2STl>-2.69 (Steps 5 through 10). The doors, ateha®, and hinges shall operate freely whî.n tasted <m step 7. Them shall be no change in tha core asterial, and sc delaainatlng, tackling, or deteriorating of the structural strength of the shelter as a result of this teat.

5. BgüIPKKKT REQITIRED AND ÜMD:

Craig Enviroaaental Test Chamber #1774 Calibration dated 7/15/66. Load and Northrop Doable Range Potantloaoter Indicator Modal 8637-0 Craig Theraecouple Switch Panel 12 Copper-^hmstantan Themoeouples

e. pftoosmmis;

0.1 Low Tçiaperatur® Test Install SEiltar in tost ehmar.lwr #1774 at ro<m .sablent conditions and attach two t'Tomoceupies to tha inaiè» ■ skin on the aids »11«. Clot'« the shelter doors and subject to the following low temperature cyclo (xjef. ' MIL-frD-168). The floor drain plug aunt be roaoWd for this test. r - ' i I (1) Deduce ohsaber tenporatare et 39* per hour to -80%. (2) Maintain at -90¾ for M fcattr* ear to prnationi

thexnel equilibriwt wHlohewer eoeurs first. The

LAWRENCE, KAM,


TEST REPORT #O10-B-8 e

6. PROCEDURE: (cont'd)

(3) (4)

thermocouplGE locatod on sido vimlls may be used to determine thermal ©quilibrium. Raise chamber temperature at 39° per hour to -65®?. Maintain at -65°F until practical thermal equilibrium is attained. At the concluoion of this period and while at the teat temperature, check that the doors and latches operate properly.

7. TEST RESULTS: Three cycles performed per Paragraph 4.4 of EE 278, Low Temperature Test. Checks made during the cycling and following each test revealed no shelter damage such as delamination of core to skin material, buckling, or deterioration of the str '.ctural strength of the shelter as a result o.f these tests. The doors, latches, hinges, hardware, etc. showed no malfunction, all operating freely at each test.

8. CONCLUSION : The shelter met the requirements of these testa.

Data sheets, charts #01109, notes, etc. as records of these tests are attached.

Approved by:

Quality Control

Engineering

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S^tem s, Inc. LAWBKHCB. MAM.

QUAUTY CONTROL DEPARTMENT

TEST BEFQBT #010-B-9

1. TITLE: Railroad Transport

S-250(XE-2)/G Bholtor - Itoa 2a Contract DA-28-04S-AMC-01604(E) Porfonaod August 18 and 19, 1966

2. PURPOSE : To test shelter design.

3.

4.

APPjJCmt BPBCIFICATIOH! S0L-4S0a», i.endnwt #2. d»t.a D.c. Í, 1965

Il I REQUIREMENT: (Specification Paragraph 4.3.3.2)

Railroad Transport - The shelter shall be loaded in the manner normally used for shipment en a railroad flat car. The test shall 1» conducted

. on a flat stretch of track. A 165,000 pound car traveling at 9 miles per hour shall be impacted against the test car coupled to two other oars. These cars shall be stationary with brakes off. Four impacts shall be performed, two with the shelter positioned longitudinally to the flat car and two positioned laterally. The direction of each impact shall be selected by the Government If blocking or tie-downs holding the shelter in place are torn loose by the Impact, the tost shall be repeated.

EQUIPMENT REQUIRED :

1 Railroad Switch Engine 1 Railroad Flat Car 2 Railroad Freight Cars

1 Railroad Car with total weight of 165,000 lbs IjStop Watch

As required - Railroad torpedoes

TESTING PROCEDURE AND RESULTS:

Testing was conducted at the Lawrence Freight Terminal of the Boston & Maine Railroad. Equipment used inoluded Boston & Maine switch engine No, 111Ô, one flat car loaded with the 8-250 shelter, two other cars attached to the flat car with weights of 31,000 and »3,600 lbs. respectively, and a loaded freight

piFannwwrîmi

lystems.Iivc. LAWRENCE, UAS3.


TEST EEPCBT #010-8-9

6. TEÜTIMG PROCEDURE AND RESULTS (cont’d)

car of lime with grosE weight of 175,800 lbs.

Railroad torpodoam were positioned 100 ft. apart close to but bofor© th® impact point. Trial runs wore mad® with an additional freight car to allow the railroad crow to get th® engine mettingo that would give them approximately 9 miles per hour. Time measurements were taken in seconds to determine the speed of all runs.

The shoring of the shelter was performed in the normal manner for shipment. The direction of impact of th* shelter during the longitudinal and lateral position was designated by the Government representative.

!:;v|''Í! 1 |H! ■ r. lÎjillïÉ ft imM.. ¡ill:«'« 'vihüi^ • hi:1

! :r

Measurements taken were as follows:

Seconds

Longitudinal 7.70 7.77

Lateral 7.00 8.00

MFH 8.9

8.85 ¡p:S:;

9.75

8.5

if

After each impact, inspection of the shoring and the shelter was performed with a detailed Inspection at the completion of the fourth impact. There was no evidence of any physical effsct on the shelter by the results of this test. Specific areas of inspection included around the lifting eyes at the changes in section from side to knee to floor panels and the door and end panels.

7. COMCLUBlOKS; The shelter design met the requirements of this test

Approved by:

Quality Control

Engineering

75

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LAWRENCE, MASS.



1. ÎTLBi Sling Drop S~250(XE-2)/G Shelter — Item 2q Contract DA~2ã-043>MC-01604(E) Ferformod Aufuut 22, 1966

2. ‘ PIIEP03B; To test shelter design.

3* APPLICABLE SPECIFICATION : SCL-460M, Amendment #2 dmted Dec. 9, 1966

IP!;

4. RB^PBMiWT: (Specification Paragraph 4.3.3,3) Sling Drop - The shelter shall b© suspended approximately 1/2 inch fren the ground by means of the lifting sling assembly at its fully

s extended height. The sling assembly and the shelter shall be dropped in free fall so that the assembly strikes the roof of the shelter. This test shall be repeated five times.

5. BQUIPMgWT REQUIRED;

Concrete pad, power winch, quick release hook.

6. TEST PROCEDURE AND RESULTS;

• The shelter m® raised and sling released as specified in requirement («I) above. Results of the five drops wi» indentations in the roof skin, none of which ruptured or penetrated the aluminum skin.

7. CONCLUSIQKg Shelter design utot the requirements of this test.

' ^PPôv®«1 by: fc •

Quality Control ÆÙà KpgiDaerlng__^

76 *

LAWRCNC2C, IIAB&


TEST MPCitT #010-B-11

1. YTO»S; Bkiû Boarinß feat i-250(lE-2>/G Sholtor - lUm 2a

« Contract DA-2ß-043-AIC-01G04<S) Porfomud Auguat 22, 1066

2. PURPOSE : To teat aholtor doslffin.

3. IPPLICABLI OPECIFICATIOH: SCL-4608A, Aasnd»®nt ¢2 dated Dec. 9, 1965

i, BlOTMMSITi (Specification Paragraph 4.3.3.4) Skid Bearing - The shelter shall he balanced on a 3 Inch pipe anywhere along the skids.

5. EQUIP MEUT KEqiJIBED;

Concrete pad, 2" diameter pipe, sling and power winch

3. TESTING PROCEDURE

The shelter with 1900# dummy load shall be balanced on a 2 inch pipe anywhere along the skids.

7. TEST RESULTS:

Shelter balanced properly along its length çith stops made at locations specified by the witnessing Government representative. Th® only result end the effect on the skids from this test was a dimpling on th® outside edge of the curbside skid caused by the shelter being in a "cocked" position when it was initially lowered to the 2 inch pipe.

8* CCWCLPBIOW:Tbe skids are acceptable to the requirement® of the .. specification.

Annroved bv

77

#íí&I Systems,lue. LAWRKMCE. MASS.


TEST BSP«®? #010-8,-12

i. tram: Thww-point support 0-250(IE-2)/¡G Oholtor - It©« 2a CoEtnact Dá~2®-04S-üaC-01SC4 <3) Psrfomed äupiot 22, 1066

2. ■If.PWE; To toot oholtor doolgn.

3. AIPPL£CâI5LS SPECIFICATgiMi SO-4S08&, Anendacnt #2 «toted Dec. 9, 1966

4. MfiiagW: (Specification JPamgraph 4.3.3.9) Three-Point iupport - Th® eheltor shall bn

V ®upport®d on any thre® bott«» ceradriB. In this position, the door shall operate freely.

5. HqCTMBMT BgggjggDi ' <

Concrete pad, power winch, sling, wooden blocks (3).

6. TBffiTXKO PßOCBDDBE:

The shelter with a d-assay payload of 1900# shall b® supported on any thre© bottom corners. The door shall be opened and closed.

1 !

7. TBETING BBBPLTB: ^

The door was opened and closed In the testing position without any evidence of binding. Latch functioned properly and secured door.

®. COfcfePBlCM: The shelter design met the requlreaents of this test.

Approved by:

Quality Control

Engineering

78

-#¿Sa> S^tems,Inc. lawp.ence. mabb.


TIÍST REPORT #010-B-13

1. Tïag: Flat is Rotational Drop Tost» S‘-250(XE-2)/G Sh®lt©r - Itoia 2a Contract DA-26-043-AMC-01604(E) Poríorraod August 22, 1900

» • * \

2. gTOPOSE; To tost shaltor design.

3. APPLICABLE SPECIFICATION; 3CL-40O8Af Araendraont #2 dated Doc. 9, 19G5

4. REQUIREMENT : (Specification Paragraphs 4.3.3.6 & 4.3.3.7) Flat Drop - The sh®lt®r »hall bo lifted to a height of 18 inches above a hard concreto surface (Measured frosa the bottom of the skids) and »hail be allowed to fall freely with the skids impacting onto the concrete. This test shall be performed onco.

RctSbional Drop - The shelter shall be placed on a hard concrete surface with a 4 inch by 4 inch member along one edge under the skids. The

* opposite edge shall be raised to a height of 18 inches above the concrete (measured from the bottom of the skids) and shall be allowed to fall freely onto the concrete. This test shall be performed once on each bottom edge for a total of four drops.

, <*■

5. EgUmggT REQUIRED:

Concrete pad, sling, power, winch with quick- release hook, rule, 4x4 timber.

6. TEST PROCEDURE:

a. Flat Drop - The shelter with a 1900# dummy ¿Ml«shall bo lifted t© a height of 18 inches above a hard concrete surface (measured from the bottom of the skids) and shall be allowed to fall freely with the skids impacting on to the concrete. This test shall be performed

once.

^-^System s, Inc. LAWBENCE. WASfl.



6. TEST PROCEDURE : (con+,d) .1..-.1. h—..i., i i i. ..i i .i i

b. Rotational Prep - Th® aholtor with a 1900# dummy load shall bo placed on a hard concrete surface with m 4 inch by 4 inch member along one edge under the skids. The opposite edge shall be raised to a height of 18 inches above the concrete (measured from the bottum» of the skids) and shall bo allowed to fall freely on to the concrete. This test shall be performed once on each bottom edge for a total of four drops.

7. TK8T RESULTS: Testing was performed as specified above with no visual damage to the shelter body. There was one noticeable effect of the drop teat on the skids. Th® outside edges of the lower part of the outboard skids for a distance of approximately 3 inches from the front and rear ends open slightly in th© rubber retaining groove. Subsequent testing, including towing testo, did not amplify or change this opening. It was considered that this effect did not alter th© functionability of the skid.

0* CUWCLUSION: The shelter design met the requirements of this test.

NOTE: Future skids will incorporate heavier walji sections to preclude skid retaining groove opening under similar tests.

Approved by:

Quality Control

EngiQ(BM»ring

80

T • -

ku i£?l System s.Inc.

LAWRENCE, HASS.



1. TITLEî Towing Test S-250(XE-2)/G Shelter - Itera 2a Contract DA-28-043-AMC-01604(R) Performed August 23, 1966

2. PURPOSEi To test shelter design.

3. APPLICABLE SPECIFICATION; SCL-4608A, Amendment #2 dated .. " ‘ Dec. 9, 1965

4. REQUIREMENT: (Specification Paragraph 4.3.3.8) " - --- - Towing - The shelter shall bo towed for a minimum

of 1400 feet in each direction (front and rear) on the skids at u speed of five miles per hour over rough terrain. As part of the towing test, four right angle turns in sand shall be atad®.

1 The turns shall be mad® with the initial position of th© longitudinal amis of the shelter perpendicu¬ lar to the truck, and the towing eye of th® truck directly in line with th© leading edge of th© shelter. The pull shall b® on on® towing eye of the shelter.

5. EQUIPMENT :

5.1 11-35 Military Truck 5.2 3-250 lifting and tie-down sling 5.3 Mobile Crane

6. TESTING PROCEDURE:

The shelter with a dummy fayload of 1900# shall be towed for a minimum of 1400 feet in each direction (front and roar) on the ski (is at a speed of five miles per hour over rough terrain. As part of the towing test, four right angle turns in sand shall he made. The turns shall be made with the initial position of th® longitudinal axis of the shelter perpendicular to the truck, and the towing eye of th® truck directly in line with th®

. leading edge of th® shelter. The pull shall be on one towing eye of the shelter.

81

< prînnnnwwpwnîipiTOmwH rrawin wnfiiw^iimifiir

/%!IÄ '^System s,Inc,

LAWRENOÎ, UAB8.


TEST REPMT #010-0-14

7. TEW RESULTS:

8 COUCLUSICM:

Tostiug mo perfoitEod at Suellotte'a Sand Pit in Mathuen, Mass, with the 1400 feet' towing performed in 3-1/2 cycled on a meantlrea 400 ft. long flection. After towing the 1400 feet in each direction, four right angle turns were mad® in the sand.

There was no evidence of any deformation either in the «kids or the main shelter structure. Paint was worn off of the skids and off of the part of the exterior floor.

Shelter design met the requirement of thim test.

Approved by:

Quality Control

Engineering-^/_

82

System s, Inc LAWRENCE. MASS.


TEST REPORT ¢/010-0-15

1. TITLE: Lifting Test “ S-250(XE-2)/G Shelter - Item 3a

. Contract M-28-043-AMC-01604ÍE) Per formed August 22, 1966

2. PURPOSE : To tost shelter design.

3. APPLICABLE SPECIFICATION: BCL-4608A, Amendment #2 dated Dec. 9, 1965

A

4. REQUIREMENT : (Specification Paragraph 4.3.3.9) Lifting - The shelter, with an additional 6230 pounds of weight uniformly distributed over the floor, shall be suspended by the four lifting eyes for a period of 30 minutes. During the test the shelter shall show no undue distortion.

5. EQUIPMENT :

5.1 Plywood 5.2 Lead weights 5.3 Weighing Scale 5.4 Special Test Structure

6. TESTING PROCEDURE :

6.1 Locate shelter in special testing structure. 0.2 Lift shelter into position and attach chains from

testing structure to lifting eyes. 6.3 Lower hoist so that all weight is suspended from

lifting eyes. 6.4 Install plywood insert on floor. 6.5 Us® weighing scale and/or count lead weight® as they

are placed into shelter and record, equally distribute over entire floor 6,250 pounds.

6.6 Allow shelter to stand 30 minutes after total weight has been installed.

6.7 Remove weights, lower shelter on to platform of test structure.

Systems, Inc. LAWRŒNCE, UASS.


TUST EKPOKT <ÿ010-B-15

7. TESTING RESULTS : After removing th® woight from th© shelter, .... ther® ms no ©vidonc® of parußnont defoma- .

tion or material woalmoss. ►

B. CONCLUSION: Shelter design oat th® r®quireiMint0 of this tost.

Approved by:

Quality Control ¿CM Engineering jj ^ /7^ (

84

V

System s, Inc. LAWRENCE, HASS.



1. TITLE : Deep Fording Test S-250(XE-2)/G Shelter - Item 2a Contract DA-28-043-AMC-01604(E) Performed August 2®, 1966

2. PURPOSE : To test shelter design. "

3. APPLICABLE SPECIFICATION: SCL-460SA, Amendment #2 dated Dec. 9, 1965

4. REQUIREMENT : Spécification Paragraph 4.3.3.10 Deep Fording - The shelter, secured by its

* tiedowns to a suitable platform serving as the sinking device, shall be immersed for a period of one hour in water to a depth of 32 inches above the bottom of the skids. There shall be no leakage during this test. No special fording kits or additional caulking, taping, etc., shall be

, * used in the performance of this test.

5. EQUIPMENT : Special plywood tank 8 ft. x 8 ft. x 36 inches deep. Attaching hold-down hardware. 1


6.1 Close shelter door and verify that drain plug is installed, 6.2 Place shelter in tank and tie it in place. 6.3 Fill tank with water to 32 inch level. 6.4 Allow shelter to remain in water 1 hour. 6.5 Remove shelter from tank and dry area around door

(us® air if necessary).

7. TESTING RESULTS:

After some false starts where water entered the shelter because of drain plug leaking (sand in the threads) and two areas where sealer was not complete, shelter remained immersed for 1 hour without any entrance of water.

85

i"" PüTWfw™"”'®!; '' ’ .7 . ï-i Tw«'ir

*

8. CONCLUSION:

Systems,Inc. LA WHENCE, MABa.



Shelter design met the requirements of this test.

Approved by

Quality Control

Engineering

!\,C £J2lC

----w:'[irríTrv~' v-rr-^ -.-1''^ r^TT^]

V

System s,Inc. LAWRENCE, MASS


TEST REPOET #010-8-17

1. TITLE: Roof Test S-250(XE-:î)/G Shelter - Item 2a Contract DA-28-043-AMC-0l604(E) Performed August 23, 1966

\


3 APPLICABLE SPECIF I CAT ION : SCL-4608A, Amendment #2 dated Dec . 9, 1965

4. REQUIREMENT: (Specification Paragraph 4.3.4.1) Roof - The shelter roof shall be loaded with a static load of 1860 pounds uniformly distributed over the entire roof area. During the test the shelter shall show no undue distortion.

5. EQUIPMENT:

5.1 Craig Systems Concrete Tost Pad 5.2 1860 lbs. of lead weight 5.3 Plywood Panel

6. TESTING PROCEDURES:

Place plywood panel on shelter roof. Uniformly place lead weights on panel.

The shelter roof shall be loaded with a load of 1860 pounds of lead uniformly distributed over the entire roof area.

7. TESTING RESULTS:

With the load on the roof, it was noted by a dimensional check that the center of the roof deflected approximately 1/8 inch. After weights were removed, roof returned to a level condition.

87

.V

8. CONCLUSION:

System s. Inc. LAWRENCE. MASS.


TEST REP0®TS#010-B-17

Shelter design met the requirements of this test.

Approved by:

Quality Control

Engineering

88

'.«¿aiiatíiciiitófíit' rí««*

U.

- -w Systems, Imc. LAWRENCI, MABS.


TEST REPOET 0010-B-lO

1. TITLE : Door Test B-250(XE-2)/G Shelter - Item 2a Contract DA-28-043-MC-01604(E) Performed August 2®, 1966


3. APPLICABLE SPECIFICATIOM: SCL-4608A, Amendment #2 dated “ ... . ' Dec. 9, 1965

4. REQUIREMENT: (Spécification Paragraph 4.3.4.2) Door - A 200 pound load shall be placed separately on each door in its fully opened position. The load shall be located at the maximum distance

from the hinge line.

5. EQUIPMENT :

5.1 Special Carrier for Weights 5.2 200 lb®, of load weight

6. TB8TIK0 PROCEDURE:

6.1 Apply load a® specified in 4. above. 6.2 Remove load and inspect for deformation and proper

function of door and latch mechanism.

7 . TESTING RESULTS:

After weights were removed, there was no deformation in the hinges and door, and latch mechanism functioned properly.

8. CONCLUSION: belter design met the requirement® of this test.

Approved by:

Quality Control

Engineering LjL '> M:

89

V I

f

Systems, Inc. LAWRENCE, MASS.



1. TITLE: Lifting Eyes T®st 3-250(EE-2)/G Shelter - Item 2ai Contract DA-28-043-01904(E) Performed August 25, 1966

2. PURPOSE : To test sheltor design.

3. APPLICABLE SPECIFICATION: SCL-40O8A, Amendment #2 dated ...... Dec. 9, 1965

4. RKQUIREMEMT: (Specification Paragraph 4.3.4.3) Lifting Eyes - The shelter shall bo firmly secured in a place, and a 5000 pound tensile load shall be applied to all four of the lifting eyes in each of the following directions: (a) upward, (b) down¬ ward, (c) horizontally in the plane of the eye, and (d) horizontally at right angles to the plane of the eye.

5. EQUIPMENT:

. Special Testing Structure Simplex Hydraulic (4 valve) Pump Model 3 HPB4089 Hydraulic Cylinder - Rogers #C2-3CK-l-3/4xl4

(effective area 4.66 square inches) Special Pressure Gage calibrated in pounds

force for above cylinder Attaching and Hold-down hardware


6.1 Attach hydraulic cylinder to one of forward lifting eyes, and to test structure.

6.2 Attach holding hardware to opposite lifting ©y© (door end) and to test structure.

6.3 Apply force in an outward horizontal direction by means of the hydraulic cylinder.

6.4 Vhen force reaches 5000 pounds, release pressure. 6.5 Inspect for permanent deformation or damage. 6.6 Disconnect cylinder and all attaching hardware. 6.7 Repeat for other two lifting eyes. 6.8 Repeat complete cycle for each direction on all lifting

eyes (Reference 4. above).

«te System s, Inc.

LAWRENCE, MASS.



r v£gTIBG RESULTS :

paring end ssiftior sill of tht? tosting cycles were completed, ther© w&s ©vldôDce of permanent d©foraimtion in the- shelter or in the Q>rs3,

COBCHJSIOT: Shelte: design met the requirements of this te®t.

Approved by:

Quality Control

Engineering // //?

91

V

Systems.Inc. LAWRENCE. HASS.



1. TITLE i Towing Eyes Test S-250(XE-2)/G Shelter - Item 2a Contract DA-28-043-0JS04(E) Performed August 25, 1966

PURPOSE.i To test shelter design.

3. APPLICABLE SPECIFICATION: SCL-4608A, Amendment #2 dated Dec. 9, 1965

4. REQUIREMENT: (Specification Paragraph 4.3.4.4) . Towing Eyes - The shelter shall be firmly secured

in place and a 5000 pound tensile load shall be applied to all four of the towing eyes in each of the following directions: (a) upward, (b) downward, (c) horizontally in ¿he plane of the ®y®, and (d) horizontally at right angles to the plan© of

the ey®.

5. EQUIPMENT : Special Testing Structure Simplex Hydraulic (4 valve) Pump Model 3 HPB4089 Hydraulic Cylinder - Rogers #C2-3CK-l-3/4xl4

(effective area 4.66 square inches) Special Pressure Gage calibrated in pounds force

for above cylinder Attaching and Hold-down hardware

6. TESTING PROCEDURE :

6.1 Attach hydraulic cylinder to one of forward towing eyes,

and to test structure. 6.2 Attach holding hardware to opposite towing oye (door ®nd)

and to test structure. 6.3 Apply force in an outward horizontal direction by means

of the hydraulic cylinder. 6.4 When force reaches 5000 pounds, release pressure. 0.5 Inspect for permanent deformation or damage. 6.6 Disconnect cylinder and all attaching hardware. 6.7 Repeat for other two towing eyes,. 6.8 Repeat complete cycle for each direction on all lifting

eyes (Reference 4. above).

Note: This test performed In conjunction with lifting Hy«s Test.

92

LAWRENCE. MASS.


TEST REPOET #010-B-20

%

l. TESTING RESULTS:

During and after all of th© tomting cycloo

were completed, there too no evidence of

permanent deformation in the shelter or in

the eyes.

8. CONCLUSION : Shelter design met the requirements of this toot.

Approved by:

Quality Control

Engineering ^ ^

93

V

System s, Inc. lAWRENCE, MASS.


TEST REPORT ^OlO-B-21

1. TITLE: Folding Steps Test S-250(XE-2)/G Shelter - Item 2a Contract DA-28-043-AMC-01604(E)

Performed August 23, 1966

2. PURPOSE: To test shelter design.

3. APPLICABLE SPECIFICATION: 8CL-4608A, Amendment #2 dated ... “ Dec. 9, 1965

4. REQUIREMENT: (Specification Paragraph 4.3.4.5) Folding Steps - A 400 pound load shall be applied on the outer section of the step.

5. EQUIPMENT:

5.1 Special fixture to carry 400 pounds of lead weight while attached to a Folding Step.

6. TESTING PROCEDURE AND RESULTS:

Special fixture was attached to the lower folding step. Four hundred pounds of lead weight were loaded into the fixture. Weight was then removed and shelter was inspected for any detrimental

affect of the test.

There was no evidence of any permanent deformation or physical damage as a result of this test.

7. CONCLUSITO : Shelter design met the requirements of this teat.

Approved by:

• Quality Control

Engineering ^

Systems, Inc. ] LAWRENCE. HA*«.


TEST RBA'Hpl&T #010-B-22

1. TITLE: Wall Ine®rt Test 8-250(XE-2)/G Shelter - Item 2m Contract DA-28-043-MC-01604(E) Performed August 25^ 1966

2. PPBPQSE: To tost shelter d^ijlgn.

3. APPLICABLE SPECIFICATION: 3CL-4608A, Amendment #2 dated Doc. 9, 1965

i

4. REQUIREMENT: (Specification Paragraph 4.3.4.6) Wall Insert - 5/16 inch steel rivnuto shall b© installed in wall members on opposite walls of the shelter in locations selected by the COTR.

’ No bunding material of any kind shall be employed to assist in securing the Rivnut in place. The inserts shall be connected together by suitable means and a 1200 pound tensile load applied from one to the other. After the load has been removed, there shall be no distortion of the shelter at the attachment location. Upon conclusion of this test, the Rivnut shall withstand 100 inch pounds of torque without turning.

5. EQUIPMENT:

5.1 Simplex Hydraulic (4 valve) Pump Model 3HPB4089 5.2 Hydraulic Cylinder - Rogers 0C2-3CK-l-3/4xl4 (effect, area 4.66 5.3 Special Pressure Gag© calibrated in pounds sq.in.

force for above cylinder. 5.4 Attaching hardware 5.5 Torque Wrench

S. TESTING PROCEDURE AND RESULTS:

The Government representative selected locations in each side wall that wore approximately the geometric center. 5/16 inch steel rivnuis were installed at these locations. Test was performed using the hydraulic cylinder attached between the two mil insert®. A tonsil© load of 1200 lbs. was applied and then released.

95

LAWRENCE. MASS.


TEST REPORT mO-B-22

6. TESTING PROCEDURE AND RESULTS: (cont’d)

Bolts were Inserted into the insert holes. The torque wrench wes then used to exert 100 inch/lb@» of torque on the insert. The insert did not turn. There vas no evidence of any distortion.

After test wit© completed, the Government representative observed that the hat-shaped supports which held the loud in place during testing had not been removed. To insure that there would be no criticism of the test a© performed, the hat-shaped pieces were removed from the shelter and tests were performed on the same inserts as described above. The result© of this second test were the some as the first; that is, no permanent defoliation resulting with the inserts able to take lOU inch/lbs. of torque without turning.

7. CONCLUSION: Shelter design met the requirements of this test.

Approved by:

Quality Control

96

LAWRENCE, UA8B.

QUALITY CONTrtOL DEPARTMENT

TEST REPORT #010-8-23 ,1

1. TITLE: Floor Insert Toot S-250(XE-2)/G Shelter - Item 2a Contract DA-28-043-AMC-01604(E) Performed August 25, 1966

2. PURPOSE: To test shelter design.


4. REQUIREMENT: (Specification Paragraph 4.3.4.7) Floor Insert - A 5/10 inch ©teol rivnut atoll be installed in a floor member in a location oolöctod by the COTR. No bonding material of any kind ohmll be employed to anoint in securing the rivnut In place. A 1200 pound tonsil® load nhall bo applied to the rivnut. After the load has been removed, there shall be no distortion of the shelter at the attachment location. Upon conclusion of this test, the rivnut shall withstand 100 inch pounds of torque without turning.

5. EQUIPMENT:

5.1 Simplex Hydraulic (4 valvo) Pump Model 3HPB4Q89 5.2 Hydraulic Cylinder - Rogers #C2-3CK~l-3/4xl4

(effective area 4.66 sq. inch) 5.3 Special Pressure Gage calibrated in pounds


6. TESTING PROCEDURE AND RESULTS:

The Government representative selected a location in the floor that was approximately the geometric

4 center for the installation of the floor insert. , Insert mi® installed. Hydraulic cylinder wa®

then attached to the floor insert and supported across the knee® of the shelter. A tensile load

97

System s, Inc. LAWRENCE HAm



6. TESTING PROCEDURE AND RESULTS : (cant'd)

of 1200 lbs. was exerted on the floor inioort. There was no distortion of th® ®h©lt®r. Testing the insert with a torque wrench on a bolt that was inserted into th® rivnut. Th® insert took 100 iach pounds of torque without turning.

7. CONCLUSION : The shelter design met the requirenente of- this tost.

Approved by:

Quality Control

Engineering }?7 ^

♦

98

LAWRENCE. MASS.

■QUALITY CONTROL DEPARTMENT


1. TITLE: Lift and Tiedown Assembly Test 3-250(308-2)/0 Shelter - Item 2a Contract DÀ-28-043-AMC-01604 (E) Performed August 25, 1966

2. PURPOSEî To test shelter design.


4. REQUIREMENTS : (Specification Paragraph 4.3.4.8) Lift and Tiedown Assembly - The combination lift and tiedown assembly shall be subjected to a tensile load of 5500 pounds.

5. EQUIPMENT:

5.1 Simplejc Hydraulic (4 valve) Pump Model ^HPBdOSÖ 5.2 Hydraulic Cylinder - Rogers #C2-3CK-l-3/4xl4

(effective area 4.66 sq. inches) 5.3 Special Pressure Gage calibrated in pounds


6. TESTING PROCEDURE AND RESULTS :

One leg of the lifting and tiedown assembly was selected by the Government representative for tests to these requirements. Tensile loading of 5500 lbs. was applied to this leg twice. Pirat on the longer segment of the two-part leg and then to the complete length of the sling leg which included this longer segment. There was no slippage of the cable in its fittings nor was there any evidence of breaking strands in the cable.

7. CCWCLUBICN: Shelter design met the requirements of this test.

Approved by:

Quality Control

Engineering 99

LAWRŒNCr, HAU.


TEST REPOET #010-0-25

T1TLB: Wat©rt±ghtn®0s Tost 0~25O(XK-2)/G Sh®lt®r - It®m 2a Contract DA-28-043-AMC-01604(E) PorfoniMää July 20, I960 and August 30, 1900

2. PURPOSE: To tost aholtor design.

3. APPLICABLE SPECIFICATION: 3CL-4608â, Amendment #2 dated Dec. 9, 1965

4. MggPIggMgHTi (Specification Paragraphs 4.3.5 and 4.3.2.1) Watertightness *» Th® «tortightnoos test »hall b® performed a second tim® mm outlined in 4.3.2.1.

Watortightness - Spray th® surface® of th® shelter with water from Nozzles Model G293Q or 6G208Q, as made by Spraying Systems Co., Bellwood, Illinois, or equal. The nozzles shall operate at 40 pounds per square inch dynamic pressure meanueed adjacent to the nozzles, shall be approximately nineteen inches from the shelter, shall point directly at the shelter panel under test, and shall be located in a pattern to provide uniform coverage of the panel under test. Niue nozzles shall be used for each end panel and for each side or roof panel. All five exposed panels shall bo tested for forty minutes each and more than one panel may p® tested at one time, if desired. There shall be no visible evidence of leakage. No additional caulking, taping, etc., la permitted during thim test.

5. EQUIPMENT:

Spider Fixture with nine (9) nozzle» . Hose (connecting to fresh water source).

Rater Testing Chamber. Rater Pressure Gage.

1 Attaching Hardware and Lifting fixture.

100

LAWpMft'mis. QUALITY CONTROL DEPARTMENT

System §,IEIC. la^&'Bäbs.

TEST REPCET #010-S*35

TEST PROCEDURE : (All doors, port® »rad olndon closed)

0.1 Placo shelter in test chamber At room tomporaturo. 0.2 Place nine noæzlc spider approximately nineteen inches

fron panel to be tostad. 6.3 Attach hose to spider and ivti mtwr &BOurce» 3.4 Turn on wmtor and verify gauio raiding to be 40 pel ± 3 pni. 0.5 Spray panol under test for a total time of 40 minutes each. ©.3 Turn off <mt®r. 0.7 Tost the vertical panols of ©belter in any convenient

sequence. 6.8 Disconnect spider from water source and position spider

, horizontally by attaching to lifting fixture. 6.9 Position spider above shelter a*5? described in 6.2. 6.10 Repeat stop© 6.3 through 6.7,

7. TSivi RESULTS : There ms no entrance of water during the test.

8. CWChVBKM: The shelter design met the requirements of this toot.

Approved by:

Quality Control

101

S3rstems,Inc. LAWRENCE. MASS.


TEST REP^T ^OlO-B-26

1. TITLE: Shielding Effectiveness Test S-250(XE-2)/G Shelter - Item 2a Contract DA-28-043-AMC-01604(E) Performed August 29, 1966


3 « APPLICABLE SPECIFICATION: SCL-4608A, Amendment #2 dated Dec. 9, 1965

4# REQUIREMENT: (Specification Paragraph 4.3.6) Shielding Effectiveness - The shelter shall be tested to determine its attenuation to electric and magnetic fields and to plane waves in the frequency range from 0.15 to 10,000 me with the doors closed. Testing shall be conducted in accordance with the basic methods of MIL-STD-285. The shelter shall attain a minimum attenuation of

f 60 db throughout the prescribed frequency range.

5. TEST PROCEDURE AND RESULTS:

See attachment of Testing Report No. 552 from Sanders Associates.

6. CONCLUSION: Shelter design met the requirements of this t©sta

Approved by:

Quality Control

Engineering ^ J/? CLtKu fri'

ELECTROMAGNETIC INTERFERENCE EVALUATION

OF A

CRAIG SYSTEMS, MODuL S-2$0 (XE-c.) /G SHIELDED ENCLOSURE

AUGUST 29, 1066

TEST REPORT NO. 5>-

PREPARED FOR:

CRAIG SYSTEMS, INC. 36O MERRIMACK STREET LAWRENCE, MASSACHUSETTS

PREPARED BY:

SANDERS ASSOCIATES, INC. 95 CANAL STREET NASHUA, NEW HAMPSHIRE

..

103

ADMINISTRATIVE DATA

PURPOSE: évaluâtp the s’ilelding elí'ectlvcncag oí' a Craii Syetems Miielded En. losure Model £-150 (XE-2)/G.

DATE TEST BEGAN. AuruBt 2?, 19^6

DATE TEST COMPLETED: August 29, 19'>h

MANUFACTURER: Cra ' g Systems, Inc.

TYPE OR MODEL: S-2D. vXE-2)/n CONTRACT NO.: ¿erial Mo. 6010-2

TEST SAMPLE SPECIFICATION OR DWG. NO.:

QUANTITY OF ITEMS TESTED. 1 (C^e)

SECURITY CLASSIFICATION OF TEST SAMPLE: Unclassified

INTERFERENCE SPECIFICATION: MIL-STD-289

TEST CONDUCTED BY: R" Burke, Technician

TEST APPROVED BY: Kicza, EMI Measurement Supervisor (Ac

DISPOSITION OF TES" SAMPuES- He alr.ed at Crait :ar., in

DEVIATIONS APPLICABLE TO INT”! I RENCi' CONTROL REQUIREMENTS: As modified by Craig Systems

Specification E3-334B

PAGE 2 OF 7 T.R. 33-

104

Test Report No. 552

TEST PROCEDURE

The shielding effectiveness of a Craig Systems Shielded Enclosure Model S-250(XE~2)/G was measured in accordance ..ith the procedures outlined in Specification MIL-STD-285 as modified by Craim Systems Specification ES-334B.

Th- attenuation of the cr, losure to Magnetic F .d Radiation was measured at I50KC at the .enter of the door .ir.c the center of each side of the shelter. The 12" loop antennas were placed in a vertical plane and were located 12 inches from the Insiie and outside walls of the enclosure.

The attenuation of the enclosure to Electric Field Radiation was measured at 150Kc, IMc and 18mc at each vertical corner and both sudes oí the main door. A 4l inch vertical rod antenna was used and was located 12 inches from the inside and outside walls of the enclosure.

The attenuation of the enclosure to Plane Wave Radiation was measured at 400MC, lOOüKc and 10,OOOMc at the center of each aide of che enclosure. Horizontally polarized dipoles and horn antennas were used. The antennas were located 3b inches from the ins_Je and outside walls of the enclosure.

A v'Odb reference was set during the reference measurements except at 150Kc where a reference level of 75db was used.

The test sample and test location are shown in Figure 1.

TEST RESULTS

The attenuated level for each test location Is given on Data Sheets 1 and 2. The attenuation of the enclosure is equal to the fre'- space reference level minus the shielded level. The minimum attenuation of the enclosure was 60db at 14Kc, magnetic f„eld, measured at the door.

CONCLUSIONS

Craig Systems Shielded Enclosure Model S-250(XE-2)/G Serial No. 6010-2 complies with the 60db requirement as outlined in Craim Systems Specification ESSS^-B.

R. BurkejTechnician ~

H _ H/ Kicza^Actlng EMI Measurement

Supervisor

-3-> 105

CURB SIDE

Teat Report No. 552

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106

SANDERS ASSOCIATES, INC. , NASHUA » N» H.

ELECTROMAGNETIC SHIELDING EVALUATION

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MODEL NO. £ri2 5#

SERIAL NO.

DATE

REPORT NO.

CONTRACT NO.

SPECIFICATION

TEST ENGINEER y , /

FREQUENCY ANTENNA

SEPARATION FREE SPACE REF. (dbp)

SHIELDED LEVEL (dbAi)

ATTENUATION DB

MAX. ATT. DB LOCATION

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TEST EQUIPMENT AND FACILITIES

TR Ü 552

-7- 109

«equip

used 1 »

Deecription Manufacturer Type- Serial CaL Datï

X Field Intenaity Mete r Empire DeviceiB NF-105 2020 8/66

X II It NF-105/TA 2020 8/66

X II « NF-105/T2 3348 4/66

X —

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NF-105/T3 1746 4/66

X H Polarad FIM-2 292 4/66

X II h FIMX2 269 4/66

X , Signal Generator Hewlett Packard 6o6a 038-03786 5/66

X Power Oscillator A.I.L. 124 12410 6/66

X

—

Antenna Kit

1

Empire Devices VA1Q5_ ..195.. ... _ —-r...

• X it h AC105 !-

X A.P.S. - 4 Radar Sanders Associates Í

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4. Factual Data - In the initial design of the S-250(XE-2)/G Shelter great emphasis was placed upon lightweight construction. To this end many design approaches which ultimately proved futile were incorporated into the Advance Development Model No. 1. The rejection of the first unit based on inadequate strength of knee panels, inadequate insert capability, dimensional tolerances and weight presented the major difficulty in this program. Each of these areas were corrected such that the resubmitted unit successfully met all of the previous deficiencies. The strength of the knee panels was reinforced by an external angle, the wall and floor insert torque requirements were increased by the substitution of wood thermal barriers rather than high density foam barriers. Dimensional tolerances were pin pointed by further definitioncf requirements and the weight problem was eliminated by increasing the allowable specification weight. The resubmitted unit demonstrated compliance with these specifications and also gave a firm basis for the preparation of Government format drawings.

5. Conclusions - It is concluded that the S-250(XE-2)/G Shelter as successfully tested under Contract Item 2a complies with Specification SCL-4608A with Amendment No, 2. Subsequent production testing indicates that units manufactured in accordance with the running set of drawings does yield a shelter which in all aspects meets specification requirements. Some 50 additional shelters have been manufactured by Craig Systems to these drawings and it is felt that the drawings fully represent the tested and approved unit.

6. Recommendations - It is recommended that future consideration be given to two possible areas of improvement. These are:

1. The use of extrusions in lieu of formed members.

NOTE: This woiild require an increase in the allowable weight of the shelter.

2. A simplified door with a possible consideration of eliminating the inner door.

It should be noted that in June of 1967 Craig Systems was awarded a contract by USAEC for a production quantity of S-250/G Shelters which will take into account the recommendations noted as 1 above. It is felt, however, that further investigation is warranted under 2 above.

110

1‘ IËg.ntii^-ation of Key Technical Personnel - The following key technical personnel have contributed to the success of the S-250(XE-2)/G Shelter program. 1

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^ÇMrU^Classification

DOCUMENT CONTROL DATA - R & D

Craig Systems Corporation, Lawrence, Massachusetts

morca wnen rne overall report Is clasell/edj

2S. REPORT SECURITY CLASSIFICATION 1

UNCLASSIFIED

Shelter, Electrical Equipment, S-250(XE-2)/G

4. DESCRIPTIVE NOTES ot report and Inclusive date») ----—--

Final Report - June 196? - September 19A7

DiPaolo, Ernest

NC\!£/7) /3£V2. /^6?

7«. TOTAL NO. OF PACES I7Ô. NO. OF REFS

120 1 f)

DA28-043 AMC-01604(E) Ò. PROJECT NO.

1E6-343-1 U 246

C'lE6-34301 D 246-06 d.

Ba. ORIGINATOR'S REPORT NUM^ER(S|

8b* Sj#Hr«pof/; POnT NO<S, other numbers that may be a#«/£nod

EC0M 01604-/=" I

Distribution of this report is unlimited

12. SPONSORING MILITARY ACTIVITY

U# S. Army Electronics Command Fort Monmouth, N# J# - (AMSEL-RD-GDO) /

v ^quipmQnL weiter ö-2^x&.2;/G is an altmdnum, lightweight,shelter fabricated of aluminum outer and inner skins with polyurethane slab insulation bonded to the aluminum skin to form a sandwich panel approximately l~V2J!'&ick. Aluminum hat members vdthin the panel provide mounting for equipment 0 lhe vdoor is provided with a door within a door# The inner door provides a means of escape from the inside#

The S-25O Shelter weighs 670 pounds and lias a payload capacity of 1900 pounds whei transported by 1-3/4 ton vehicles# / . , ^

_ The development of the S-250 Shelter was accomplished under Contract DA2Ö-043 .AMC-01604(E) issued 30 June 1965. Under this contract an Advance Development Mpdel was designed and succossfully tested# The configuration of this accepted unit was the basis for the preparation of a complete set of manufacturing drawings suitable for reprocurement. These drawings were further used for the actual fabrication of pr->- rarement models. The final set of drawings was submitted to USAEC on 30 June 196?. I

rnaJ°r accomplishments under this development were the successful design of & f lightweight, high strength-to-weight ratio, RF shielded shelter capable of withstand¬ ing worldwide environmental conditions. The S-250 Shelter was type classified STD ''A1' on 27 April 1966.

OH «’ow VMJ I MOV fO 1473

END. mtPLACES OD KOMM 147*. » JAM «4. WHICH IB OBBOLKTK KOM ARMY UBS.

Security ÒloBBlfication

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