(1945) Recoilless Weapons T15E13 T15E9 T21 T9

8/16/2019 (1945) Recoilless Weapons T15E13 T15E9 T21 T9

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HILE the necessity of pr

..., ,. .. -= superior fire power has lo .- 7. .-". perience in this war has sharply em

Warfare today is not st ati c warfararmies confronting each ot her alonrelatively small fronts; rath er i t ichangingpanoramaof break-throuhead actions, and frequent isolatthe need for highly mobile and p

became apparent and has resultevelopments as the rifle grenade, launcher, mort ars and similar li ghtfor improved accuracy and increasthis type grew apace, the Ordnan e t s to provide equipment-

~ Jo@j e shell with these character" "'"?' :. , s ,.-f -, : ; ? :: -. - - . *i 0 ik&mpany infantry in almost4 ,, t . , r q< - *. . ?+?; i *- yE -+

I, +-L- controlling factor in weapoth at of weight, and weight is inev


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THE 57-mm rif les T15E13 and T15E9 operat ingrecoilless principle hav e been designed to provant ipersonnel an d an t i tan k weapon of l ighter weigreater range and accuracy than other comparablweight weapons.

This rifle operates on principles similar to thosconventional gun except in th e characteristics of th eUpon ignition of the propelling charge a controlled of gas is a l lowed to escape to the rear which w

forward mome ntum of th e shell creates equal anding forces within th e r i fle . The force exerted b y tjectile in its for\vard passage through the tube counthe force of t he gas escaping through Y enturi opin the breech. IIence since these two forces are bathe r i f le does not move appreciably. nIoreover the 1openings are tlesigncd to e xert a rotation al reactionoffsets the torq ue induced in th e r i fle by th e movof t he projectile thr ough the rifling.

Th e cartridge case of t he round for this rifle is


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O n Mount Tripod30 91 7A

Bipod T3E1 FFiring from Shoul


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C H A R A C T E R

RIFLE 57=MM T15E13

Weight (gun complete-for mounting on tripod). . . . . . . . . . 40.45 Ib.

Length, over-all . . . . . . . . . . . .. . . . . . . . . . . .. . . . . . . . . . . .. . . . .60 in.Recoil mechanism.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .None, recoilless H

Muzzle velocity. . . . . . . . . . . .. . . . . . . . . . . .. . . . . . . . . . . .. .1,200 f/sMaximum range. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4,400 yd.

with Shell, H.E., 57-mm, TPP

Type of breechblock. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Interrupted lugFiring mechanism. . . . . . . . . .Spring loa ded hammer, floating firing pin,

trigger operated sear

Rifling.. . . . . . . . . . . . . . . . . urn in 30 calibers-uniform, right handMount. . .Bipod, T3E1 forms rest for shoulder Firing or bip od for prone

firing used in conjuncfion with extendable front Handle, T3E1

Alternate Mount. . . . . . . . . . . . . . Mount, Tripod, Cal. .30, MI91 7 A 1

sights when telescope is not used 5.Iron Sights. .Sight, Front, T91 and Mount, Sight, T1 POEP provide iron


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Carried y Two Me n T27E2 with Slings. Rounds Carrie d in Bag

vas Rocket


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C H R C T E R I S T I C S

Shell Shell FuzeWe i g h t

Fuzep e

Primer Cartr idgeCase w / o

CompRd. Ww/cont

H E 57-mmlT22H E A T57-mm, T2OE2

Smoke WP)57-mm, T23

9.75 Ib.

9.75 Ib.

9.75 Ib.

P.D.

P.I.

P.D.

Perc., T37

Perc., T37

Perc., T37

Steel, T i

Steel, T i

Steel, T i

5.30

5.30

5.30

7.1

7.19

7.19


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R I=-

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C H A R A C T E R I S T I C S

Wei ght (gun w/o sights or tripod). . . . . . . . . . . . . . . . . . . . . . . . . I 0 5 Ib.

Length, over-all. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .81.78 in.

Recoil mechanism.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .None, recoilless

Muzzle velocity.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1,000 f/s

Type of breechblock.. . . . . . . . . . . . . . . . . . . . . . . . . . . . .Interrupted lug

Firing mechanism. .Spring loaded hammer, floating firing pin, triggeroperated sear

Rifling. . . . . . . . . . . . . . . . . 1 turn in 22 calibers-uniform, right hand

Elevation (on Mount, Tripod, caliber .30, M I9 1 A 1). . . . . . . . +27"

Depression (on Mount, Tripod, cali ber .30, M i91 7A 1) . . . . . . . . -65"

Traverse (on Mount, Tripod, caliber .30, M I91 7 A 1 . . . . . . . . . . 360°

C C E S S O R

1. Mount, Tripod, M

2. Jacks, Leveling, T

3. Cover, T39 (Muzzl

OPTICAL FIRE CONTRO

Telescope, T12

Quadrant, Elevation

Breec


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Cartridge, H.E., 75-mm, T38


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H O W I T Z R105=MM, T9 nd CARRIAGE 105-MM,

H O W I T Z E R 105-mmT9 and CARRIAGET9 in traveling positionbehind 1 4 ton 4x4 truck


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HOWITZE

in firing positio


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A M M U N I T I O N

t is anticipated tha t d l standard shell now fired in 105-mmhowitzers will be satisfactory lor use in the T9. The cartridgecase which has a plastic blow-out plug in the base has a ca-pacity of approximately 300 cubic inches. Due t o its largerdiameter there is no likelihood of its being mistaken for regular105-mm ammunition.

Initi al firing tests t o date indicate th at velocities of approxi-mately 1 050 I/s with t he 105-mm Shell H.E. IZ1 are obtainedwith granular powder within the pressure limits of th e T9Howitzer. Range is approximately 7 500 yards. Th e ammuniti onis semi-fixed and the complete round will weigh approximately51.5 pounds.

The fragments o the plastic blow-out plug in the base ofthe cartridge case t he rearward flash of the propellant andthe dust and stones picked up by the gases creates an unsafearea directly in back of t he howitzer for about 100 yards. Saf etyrestrictions will be determined.


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(1945) Recoilless Weapons T15E13 T15E9 T21 T9

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