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DISCLAIMER NOTICE

THIS DOCUMENT IS BEST

QUALITY AVAILABLE. THE COPY

FURNISHED TO DTIC CONTAINEDA SIGNIFICANT NUMBER OF

PAGES WHICH DO NOTREPRODUCE LEGIBLY.

'234

an be vv.0

for~~~ ~ ~ ~ pu*.pla"cdM

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W v w w T

RVPORT No. 71o/23

BICOND RVPOR? OF TEBS

of

(OmposITE PLATIS

A eso o

'NTISGRA&

DTIC TAUnnnune

AvailabilityCe

D j. m~TI

I* .

Four typos of oomposite plate were tested in

an effort to find a more suit~ble combination of

pl~ates and Bpaoiflge.

The-results indioate that 1/4~ spaces are

too largeq The 1./80 spacing used in the first

Acomposite plate We A. Report 710/14 was m-ore

efficiento

Tneose combinations were not as good as that

shown In V# A, Report 710/14. A'1ho platea were,

therefore, -not submitted to test with calt .30,

A. Po, High Vol. ammiu°ition

0

Respoctfully subimittcd, 0

Do, J, Uartin18t Lt., Ord* Dopt.

0

0 W W W W ?v W v W W W 0

~~No. C -1

DATE 5-28-34

1/4"1 50C. Homogeneous Diaston plate

Heat treated by Disston Go. in standard I.

manner, oil quench 1600 0 F Draw 1100 0F

Ilk Brinell 400 to 430.

-apce.

.AfMOR PLATE CCIIPOSITION

C. un. PO so 1 Cr. Mo. va,..45/Ji3., ).j.6o ---03 -c.03 .15/.25 1.10/1.30 -60/.50 .200/,,Y

______________ROM STND GRIKING

at (1 (service)2488( Partial exc."".front (2 1 lo (to back p 1.

at (3 " " About the3x backC4 " same as at t

(5 " front.

4X Holes Marked 0 fired at front ofPlate.

" X " " back ofPlate.

.5x

PLALJL NOBUL,1 100 YD. RLNGEv .30 CAL. 3(1922 A.P. BULLETS,-WaxammUNLESS NO=E OTHERISE.

Springfield Rifle

I

2~

I

I

A

0y .c' ~

I - -

4---

V

<I"11*I!

I.

HMII~~E

K-1*

Vf~ PLAT NL1o. C -2

DlATE 528-34

1/4" 50C. Homogeneous Disston Plate

Heat Treated by Disston Co. in standard

manner, oi:l quench 1600 0 Fand Draw 1100 0F.

Brinell 400 to 430.

Spacing of 1/4"1 found to be to great

combination C-4 in this report tried

with 1/811 spaces, to see if improvement -

could be obtained.

ARMIOR PLATE COMPOSITION

C. Mn, P. S. Si. Cr. Mo. vz -

ROUND STRIKINGNO.~ VELOCITY EPQWXS

at (1 2488 Nat as goodfront(2 " as C-1

at (4 " About sameback (5 "as front.

03 (6

Holes marked 0 fired at front of 0Plate.

X " "back ofPlate.

PLATE NOB.MAJJ, 100 YD. RANGE, 030 CAL. M1922 A.P. BULLETSSX9=ZI aMUNLESS NOTE OTHERWISE.Springfield Rifle0

e S

oee

S7..

100

rV

b

4

* 4~..

A-

r~~- '.'.

)

D

K

K

C /kmoAJ? PLAkTE NO0.

0 ,, /44 Wo 0. com nus -Most= plalte. ,

lat treated by Diton &Co. in

o mmar, oil q . 1O , ""W

awo no' ', Drimu 400 to 45O.

I p t../4- .. too =0h C-..

0

ARMR PLA1TE COMPOSITION

C. Yn. P. S. sCr. Mo. V.

- .'"r5 L.).6o -.03 <-03 -,.5.-25 1.. 0/1. 30 6o/,o .2C-,-. ')

____________ OTJND STRIKING=NO. VELOCITY PA , -S

at ( M2 pata

0 o

a~et fro cc

PLAT~E NORMaJ, 100 YDl. RANGE, .30 CALL. M1922 A.P. BULLETS,

M14 UNIJFSS NOTD OTHERWISE,sprwuIc~ ml- 91

2>L

Mill

;N11

(NA7

I..-

I

_______

~ IF

__ ___ _____ ____ _______________ k ______

__

__

F

I-

5-o CA6,,o PLATE o . 6

7_ .__o A ____ _'__'"-

e~"~~t,1e a Plate 6-9 wth

the 6oxptica of th .paces.

the Ip.ce en tbio plate amo

V1, PUA 't /4' o& Plato 6-2.

Us reuts we about the w=

au those of ,@1, C2-. rand

Mlato. Eat treated In the etd-

*v oil qu oh !600017 , .

w 100p, sawn 400 to 4w.

AF.dOR PLATE COMPOSITION

C, L,:. p. S. r. r. Mo. Vao45/,S5 4-)/.6o --.03 -r-03 -15/.25 1.10/1.30 .60/.90 .20,".30 c

ROUND STRIKINGNO. VELOCITY mgR .S

- CorVIC oY 0.1.P.) c :Pr c ..

( 0. 31.P. )platr

O x4

PLATE NORMAL, 100 YD. RANGE, .30 CAL. M1922 A.P. BULLETS,MNT BARREL UNLESS NOTED OTHERWISE.

__-_____i

S

- A

* .7

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. 1( oI.

ye 0

q-7

.~~~~~~ .ii .... .

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