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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.
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
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
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
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