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An advanced weapon and space systems company

1APPROVED FOR PUBLIC RELEASE OSR# 08-S-1194

LW30mm (30 x 113mm) Spotter Charge Prototype

2008 NDIA

42nd Annual Armament Systems:

Gun & Missile Systems Conference & Exhibition

21 24 Apri l 2008

New Orleans, LA

Jim RothDesign EngineerMedium Caliber AmmunitionATK Medium Caliber SystemsPhone: 763-712-7722Email: [email protected]

Contact info:

Curtis FieldingATK Launch SystemsPEP, Research and DevelopmentPhone: 435-863-6188Email: [email protected]

Fred StecherATK Advanced WeaponsWarheadsPhone: 763- 744-5117Email: [email protected]

Dan NielsonATK Launch SystemsOrdnance&EnergeticsPhone: 435-863-6687Email: [email protected]

APPROVED FOR PUBLIC RELEASE OSR# 08-S-1194

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Background and Need

Technical Approach

ATK Testing

Testing at Ft. Rucker

Acknowledgements/Contacts

Questions & Answers

LW30mm Spotter Charge - Outline

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LW30 Ammunition 30mm X 113mm

M789 HEDP

High Explosive Dual Purpose

M788 TP

Training Projectile matched to M789

Length (max): 113 mmWeight: 343 gProjectile Mass: 234 g

Muzzle Velocity: 805 m/sMax Range: ~ 3000 mDispersion: 1.35 mils

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30mm M230 Chain Gun Automatic Cannon

Caliber: 30mm X 113mm - LW30 Linkless

Max Range: ~ 4000 meters

Rate of Fire: 625 25 Shots per Minute

Platforms:

AH-64 / AH64A Apache Attack Helicopters

MH-60 Variants - SOAR

Targets:

Light Armored Vehicles

Deployed Infantry

M230 Weapon System

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LW30mm Spotter Charge IRD Schedule Challenge

Phase 1 Preliminary

Design(Test 2457)

Phase 2 DetailedDesign

(Test 2465)

Phase 3

Build and Test(Ft. Rucker Demo)

Approx. 8 month schedule from Concept Definition to Govt Demo

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LW30 Spotter Charge ATK Team

ATK Medium

Caliber Systems(Ammunition & Gun

Design, Chem/Met Lab)

ATK Launch

Systems(Spotter Material /

Candidate Selection)

ATPG(Load, Test and

Evaluation)

ATK Advanced

Weapons(CTH modeling,ANSYS, Rapid

Prototype)

LW30 Spotter

ChargeDevelopment

Ammunition

Systems

Radford(Cartridge Hardware)

ATK Tactical

Propulsion and

Controls (ABL)

(Projectile Hardware)

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Spotter Charge Design Challenges

M788 TP Projectile Velocity vs. Range

0

100

200

300

400

500

600

700

800

900

0 500 1000 1500 2000 2500 3000 3500Range (m)

Velocity

(m/s)

Solid AL NoseSteel Body

Marking Material

Hollow AL Nose

Potential Spotter Fill

Potential Spotter Fill

Short-rangedemonstration 05

Desired range for demonstration

Impact velocity and target media are key parameters for Spotter Design

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Material Selection Approach

Technical:

Approach driven by the desired capabilityrequirements

Key challenges: Spotter material sensitivity

against soft ground target and reaction againstplywood

Schedule

Off the shelf material currently in use at ATK-LS

Castable material due to time constraints of loadtooling and integration with projectile geometrychanges

Selection

Identified 3 initial material candidates to beevaluated in ballistic capability testing

Down selected to most viable materials forhighest probability of success on target media

ID Description

X-9 Magnesium powder

Strontium Nitrate (Red

marker)

ATK-LS proprietary binder

X-5 ATK-LS proprietary Flareformulation

Potassium perchlorate

X-8 Magnesium powder

Sodium Nitrate (Whitemarker)

ATK-LS proprietary binder

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Spotter Charge Projectile Assy Configurations Phase 1

M759 Ogive

M759 Probe

Cap

M789 BodyCastable spotter material

-101 , -102, -103

Base Plug

Spotter Material in Projectile Body & Nose Assembly

Spotter Material in & Nose only

To address the aggressive

schedule for demonstration,

existing M788 or M789 projectile

hardware will be used or altered

to accommodate spotter material

cast loading.

As-mixed

Dispensing guninto Projectiles

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PRODAS Modeling for Ballistic Match to M788/M789

Baseline M789 Model in PRODAS Library

Baseline M788 Model in PRODAS Library

Initial LW30 Spotter Charge Model

Projectile Assy (grams) -Measured - All Samples Config 1 and Config 2

LW30 Spotter Charge Demonstration Projectile Build

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Serial Number

Mass(grams)

Spotter ChargePrototype Projectile

Mass~222 grams

M788 / M789 ProjectileMass 234 grams typical

PRODAS Trajectory Comparison for 1500m &3000m

1500m: QE 31.4 Gunners Mils

3000m: QE 148.8 Gunners Mils

Muzzle Velocity 805 m/sec for all projectiles

0

50

100

150

200

250

300

0 500 1000 1500 2000 2500 3000

Range (m)

Altitude(m)

M788 TP Baseline

Design 4 LW30 Spotter DL-Q219

M788 TP Baseline (Muz Vel 805m/sec)

Design 4 LW30 Spotter DL-Q219 (MuzVel 805 m/sec)

Trajectory at 3000m short for same QE and 805m/s muzzle velocity; increase MV to attain

match for spotter to 3000m

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PRODAS Trajectory Comparison for 1500m - QE 31.4 Gunners MilsMuzzle Velocity 805 m/sec

Muzzle Velocity 833 m/sec for match to 1500 for Design 4 (~220 gram projectile)

0

5

10

15

20

25

30

35

40

0 100 200 300 400 500 600 700 800 900 1000 1100 1200 1300 1400 1500

Range (m)

Altitude

(m)

M788 TP Baseline (MuzVel 805 m/sec)

Design 4 LW30 SpotterDL-Q219 (Muz Vel 805m/sec)

Design 4 LW30 SpotterDL-Q219 (Muz Vel833m/s)

Ballistic Match PRODAS Trajectory Plots for 1500m

M788 at Standard

temp conditions,QE#1

For same QE set for M788,trajectory of spotter if targetingsame muzzle velocity

Spotter at Standardtemp conditions,

sameQE#1,increasedMuzzle Velocity

PRODAS modeling used to establish muzzlevelocity needed to attain match to 1500mand 3000m.

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ANSYS Stress Analysis for Ogive

Von MisesStress (psi)

Max. PrincipalStress (psi)

Max. ShearStress (psi)

Plastic Equiv.StrainC

L

InitialGeometry Ogive wall thickness will survive gun launch loads

Ground Impact Trajectory Plots

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Ground Impact Trajectory Plots1500m / 2000m / 3000m Gun at 0 vs. Altitude

Firing at Ground Elevation(Ft. Rucker Demo)

Firing fromAltitude

PRODAS Output for M788 TP

Angle of impact at

3000m similar forboth ground and

altitude firingscenarios

1500m 3000mShallow Angle of impact at1500m for ground firing

CTH M d li f G d I t 1500

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CTH Modeling of Ground Impact 1500m

DRY CLAY

Time=3 sec Time=3sec

Time=40 sec

DRY CLAY

Time=40 sec

75 0 C

14.5 ksi

1500m test at Ft. Rucker fired from ground-mount will produce shallowangle of impact that will make it difficult to initiate spotter fill.

(ksi)

14.5

1.45

0.145

(ksi)

14.5

1.45

0.145

(ksi)14.5

1.45

0.145

(ksi)14.5

1.45

0.145

PyrophoricfillCase

CTH M d li f G d I t 3000

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CTH Modeling of Ground Impact 3000m

Time=3 usec

Time=120 usec

Pressure Fringes

Temperature Fringes

Time=3 usec

Time=120 usec

Increased angle of impact at 3000m may provide increased shear orthermal stress upon impact; however the impact velocity is reduced

DRY CLAY

(ksi)14.5

1.45

0.145

(ksi)14.5

1.45

0.145

(ksi)

14.5

1.45

0.145

(ksi)

14.5

1.45

0.145

1800

C

Pyrophoricfill

Case

2000 T t R t ATPG

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2000m Test Range at ATPG

500 m

2000 m

2000m

Gun Pad

Target Area

Aerial ViewSource: Google Earth

View from high-speed camerato target

ATPG Test Setup Photos Gun to Target

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ATPG Test Setup Photos Gun to Target

500m Gun Firing Position Viewpoint

2000m Observation Viewpoint

Target

LW30mm Spotter Charge IR&D

M788 TP Drift vs. Range - PRODAS Eval for Cross-Wind

Firing at 2000m vs 16' wide RHA plate

-12-10

-8-6

-4-202468

10121416182022242628303234363840424446485052545658606264666870

0 200 400 600 800 1000 1200 1400 1600 1800 2000

Range (m)

Drift(ft)

0 cross-wind-10mph cross-wind

-5mph cross-wind

-3mph cross-wind

+3mph cross-wind

+5mph cross-wind

PRODAS Modeling for cross-winds showed risk

for missing test target at 2000m; thereforeconducted initial capability testing at 500m

ATPG Hi h S d Vid 500 t ti i t t l t t

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ATPG High Speed Video 500m testing against steel target

Serial Number: 2-101-1Material:X5Projectile Config: Nose only9/4/07 (Frame 100)

Serial Number: n/aHEDP baseline/ CartLot NRE07B001S9089/4/07 (Frame 150)

Serial Number: 2-102-1Material:X-8Projectile Config: Nose only9/4/07 (Frame 140)


ATPG High Speed Video 500m testing against steel target

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ATPG High Speed Video - 500m testing against steel target

Serial Number: n/aHEDP baseline/ CartLot NRE07B001S9089/4/07 (Frame 150)


Serial Number: 6-103-1

Material:X-9Projectile Config: Nose&Body9/5/07 (Frame 420)

Serial Number: 6-103-2

Material:X-9Projectile Config: Nose&Body9/5/07 (Frame 200)

ATPG High Speed Video - 500m testing vs plywood target

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ATPG High Speed Video - 500m testing vs. plywood target

These 2 tests were conducted at 500m with full propellant load andshow reaction on plywood in high-speed video, but not visible to unaided

eye at gun (500m).

When fired at 500m with 40% propellant load (simulating 1500m impact)there was no reaction seen on high speed video.

Demonstration Test Plan Example of 27-Round test block

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Demonstration Test Plan Example of 27-Round test block

Day or

Night

Firing

Distance

Viewing

Distance

Apache Gunner

View

Apache Pilot

View TargetConfig 1 Config 2

Day 1 Day 1500m 1500m Unaided Unaided Steel X



Day 1 Day 1500m 1500m Day TV PNVS FLIR Steel X



Day 1 Day 1500m 1500m TADS FLIR Unaided Steel XDay 1 Day 1500m 1500m TADS FLIR Unaided Steel X

Day 1 Day 1500m 1500m TADS FLIR Unaided Steel X

Day 1 Day 1500m 1500m Unaided Unaided Plywood X



Day 1 Day 1500m 1500m Day TV PNVS FLIR Plywood X



Day 1 Day 1500m 1500m TADS FLIR Unaided Plywood X



Day 1 Day 1500m 1500m Unaided Unaided Earth X



Day 1 Day 1500m 1500m Day TV PNVS FLIR Earth X



Day 1 Day 1500m 1500m TADS FLIR Unaided Earth X

Day 1 Day 1500m 1500m TADS FLIR Unaided Earth XDay 1 Day 1500m 1500m TADS FLIR Unaided Earth X

ATK Projectile Config

3 TargetTypes

Day &Night

firing

3 viewingscenarios

1500 & 3000mviewing range

1500 & 3000mfiring range

Total of 170 cartr idges shipped for Demo

LW30 Spotter Charge - Ft Rucker Demonstration Test Setup

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LW30 Spotter Charge Ft. Rucker Demonstration Test Setup

Source: Google Earth

3000m

3000m

Target

Area

1500m

1500m

TargetArea

Fixed

Gun Pad

Location

Apache

viewingControltower

ATK M230 LF Gun / ROI Raven system used at Ft. Rucker

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ATK M230 LF Gun / ROI Raven system used at Ft. Rucker

3000m target

1500m target

Recon Optical's RAVEN R-400

is used for common remotelyoperated weapon station(CROWS) program.

Example of Steel Impact Day and Night Testing

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Example of Steel Impact Day and Night Testing

Camera #54

Day Testing

Camera #54

Night Testing

Summary

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Summary

A prototype spotter charge for the 30x113mm LW30mm Ammunition family was

evaluated against multiple target media and ranges of trajectory

Modeling tools were used for analysis of mass properties, aeroballistic performance,stress analysis and impact thermal stress.

PRODAS modeling provided ballistic match that was verified with radar tracking in ATK

test. CTH hydrocode modeling indicated that predicted reaction of spotter material on ground

impact would be marginal depending on impact angle and velocity.

ANSYS stress analysis modeling provided design safety that was verified in structuralintegrity ballistic tests.

Demonstration testing conducted at Ft. Rucker tracked with the results from ATKtesting:

Reliable visible reaction when impacting Steel target, day and night at 1500m, and night at 3000m. Dayimpact at 3000 not available.

Impact on Plywood target showed delay reaction behind target; at times was evident and scored by pilotas sufficiently visible allowing for adjustment. More evident at night.

Limited frequency / Marginal short duration visible day / night when impacting ground at 1500m.

3000m testing did not reliably impact visible target area due to drift from cross winds (PRODAS)

Further development efforts on hold pending government evaluation of thedemonstration testing and updated User need assessment.

Acknowledgements

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Acknowledgements

OPM-MASMaj. Glenn Dean

Bill Wong

Scott Bryan

ARDEC

John Hirlinger

Jeff Darbig

Rich Schrum

Anthony CorteseDameon Gabriel

Ft. Rucker

Maj. Kevin BeldenBob Smithson

Joe Webers

CW3 Patrick Backmann

ATK MCS Design

Larry DoumaJim Lamb

Linda Heuer

Gary Wittmer

Don GloudeVince Martinez

Recon OpticalDoug Hagie

ATK ATPG LAP

John KraljicDennis Martinson

Scott Larson

Rich Johnson

Clayton Weitnauer

John KraljicTony Teale

Sandy Ohotto

George Berning

Eric Severson

ATK ATPG Test

Bret George

Dave Steffenhagen

Don Newman

Jim Raivala

Cary Whetstone

Tom Lorentz

Joe Lamon

Mike Cypher

ATK MCS Programs / BDScott Teigen

Rodney Ward

Butch Nery

Chris Stewart

Ellis Clark

Matt Berg

ATK LSCurtis Fielding

Dan Nielson

Rick Tanner

Steve Glaittli

ATK AW

Fred StecherWayne Hierlmaier

Mark Krueger

Dave Fehr

ATK ABL

Dave Starr

Annette Staggs

ATK AW

Dave Geiss

Dave Darden

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