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AD009499
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CONFIDENTIAL
Approved for public release; distribution isunlimited. Document partially illegible.
Distribution authorized to U.S. Gov't. agenciesand their contractors;Administrative/Operational Use; APR 1953. Otherrequests shall be referred to Naval ProvingGround, Dahlgren, VA 22448. Document partiallyillegible.
30 APR 1965, dodd 5200.10 gp-4; USNSWC LTR, 26APR 1976
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THIS REPORT HAS BEEN DELIMITED
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© COHPIOSNTUX. NPO RSPORT KO« 1117
Ballistieo of Hod-Llk« Fragment»
imjL
3Yf:Q?SI3
1« Tcatt of rod-producing warheads have Indloatad that rod-like frarnonts becoae ihoroasingly difficult to obtain in high length/ width ratios as fragnont voloeitie« rice above the 4000 ft*/a30* penge» This toot is the first of a series pl&nnod to further iavosti^ate this phonoaenon*
2, Un^.u« the conditions of this toat, 3/6* oqur,ro rods of 6~l/Z* and I'Z-l/S'* lengths wars eni^llsd frca eylindriasl Kirhoado at av-ra^o valoeitiea of 2430 ft./aoo« and 3595 ft»/foc., rcop^ctlväly. Thu «iily breaking of tha roda oeourrcd at tho estroua orda.
3» A r itxMur^ical onr.ainntion of tha roc'j vzs con4«ct<2d, iacl rJlnj » dötdVD.inatlott of tha Larüntioa jitt^ra cr.-endir.^ tJji'cti^Ii ths red fron tho c^.oslv« faoo to tha o-.rjr-ito oido« A cooalCcrctlo a.-.anut of c^id t^^lcicg of ths rod Rat«ric\l lo evident.
A« Tho dasiga of the warhond xfill bo ot:'.^cd for futura v.-orU to cors nearly opprosit'.ato ft "frea-rod1* varh^ad«
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COHFIÜ^KTIAL
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0 0 COJIFIDSNTUL NPO REPORT KO. 1117
Ballistlot of Rod-Lik« Fragment«
imj&M wmmt 2&2A
SYH0P3I3 • \ • • •••••• 1
TABLE OP COUTSHTS« •••••«•••« 2
AUTHORITY. •••;.«••••••••• 3
REFERSHCES «••••«•'••••••••••••• 3
BACKGEOUÜO AND OBJECT OP TEST, •• ^. •••••• • 3
ZSSCHIPTXON OP ITEMS U»D2R TEST« •••«••••• 4
PR0C3DURB, •«••«•»••,••_•«••••••• 5
RESULTS Ann Discassion •••«••^••••••» 5
concLuaions« •••••••• « 7
APP3ÜDU A - tfARHSAD DESIGN. • • • • • ^ • « • •FX0Cir:3 1-3 (Incl)
APP3:IDIX D - fVAoir.ivit.7iou &rr.fa • • • « • ^ « ,piGur::o A-5 (i.noi)
APr-^ÜOIX C - PHAOIOT VSLOCSTY DATA. «,,••• .TÄBZ.3 Z l«20(Xncl)
APPCKDIX 0 - PUTS in?ACX3 • . ,. TADLI3 II I (OnJy) . Piourra 6-17 (Inoi)
ZQWQ PACS, • • FXGUi 23 1C-19 (Jucl)
AP?3!:DIX P - cr-LOsivs ion:ai:3 OP ROD IIAT^XAL .VM*?.^ HI I (0.117) ^ FIGb:.-.3 20-^3 (i«i02.)
APPIillDIX 0 - DIOTRinTiJIOiU «•••«• l-JJ (Intl)
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COHPIDSNTIAL SECUnm INF0R1L\TI0M
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CORFIDSNTUt MFC REPORT NO. 111?
Ballistics of Red-Lik« Pr«£~entd
rART a
INTfiODUCTIOM
1« AUTHORITY!
This test was authorised by roference (a) and conducted under Task Aeolgnment Mos, NPG-Re3d-442-l-52 and KPC-ne3<l-442-l-53» established by references (b) and (c)«
2. REFERENCESi
«• DÜORD Conf Itr KP9 Ho3d-ÄMjbc Ser 9607 of 29 June 1950 b« BUORD Conf Itr IJP9 Ue3d-WKB:ha Sei- 23908 of 4 August 1951 o« BUORD Conf Itr HP9 Re3d-AHibc Ser 42653 of 29 July 1952 d« NPG Conf Report Ko« 1106 (To be published) e. NPG Conf Report Ho« 949 of 1 April 1952 f. KPO Conf Report Ko« 979 of 9 Hay 1952 g« MPG Conf Report Ho. 1009 of 14 July 1952
3. BACKGROUHD AHO OBJECT OF TEST I
Toots of rod-producing warheads by the Haval Proving Ground and othor activities have indleatod that rod-like fragiaonta beeono inoreasingly difficult to obtain in lon3th/vidth ratios of 24 or higher a» velocities rise abovo the 4000 ft./soe* range (refer- ences (•)( (f), and (g))v
Further inveatisaticn of this phononenon Indicated that while tapered rods would hold together at coaovhat higher velooitiea than would the usual rectangular rod, the porforaoneo at velocities proposed for nisolle warhoede was not yielding design length ivodo. If this difficulty wore insurmountablev the varhsad doelgnor would bo loft with two (2) alternativos} to reduce tho initial volocity of the fraguonts to that which would produce dosign length frag* sicnto, or to dooiga the varhoada for rod'like fragaonts of length/ width ratios of as low as 5 up to possibly 12.
To aid in reaolving this problem, it was desired to aocuro infornation ooncornlng tho break-up of rectangular rods expelled undor optima conditions at various velucitiee.
Tho Naval Proving Ground has doelgnod, fabrlcatod, and fired the first nodel of a warhoad designed to give soae indicaticn of the optinun obtainable length/width ratios in rod-like fragsionts fron warheads. CONFIDENTIAL SECURITY INFORMATION 3
>
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Ö CONFIDENTIAL NPQ REPORT »0# 1117
SallittloB of Rod-Llk« Fragnonts
4t DSSCRIFTION OF ITEMS UNDER TESTi
Th« warheads dealgnod and fabrloatad for thlt taet ar« shown in Figures 1-3, incluslvs«
Th« outer wall of each warhead was a single row of rodaf oado hy outtlng 3/Ö« square bar stock (hot rolled AZSI C-1C25 stool» as reoeivod) to tho desirod longth* The rods fit into 1/4" ddop grooves in the uppor and lower rings and wore voided wlft a single toad (one (1) pass) at each end, around the outside, to inousra rigidity of the asssably«
Tho innor vail, forsing the oontr&l void, was fabricated of 20 gau^e choot iron» The space botwoen the outer wall of rods and the innor ehoot iron vail was loaded with Canp-joltion C-3» Tho one (1) inch top space was also loaded with Cocpoaition 0-3 after dotoraliiinß the o.tploBive weight in the annular space*
The onapty and loaded woights wore as folZovei
If* Rd*
M &ta.
v\ h rl - h 1 '3 :
!ii -
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Rod Scpty
6-1/2» 31.16 lb.
6-1/2« 31.07 lb«
6-1/2«» 31.21 lb.
12-1/2" A^.94 lb.
Chg. Chg« Top
7,39 lb. 4.00 lb,
7.34 lb. 3.96 lb.
7,32 lb. 4.10 lb.
14,79 lb. 4.08 lb.
Ch.% Wt, Total t-rt.
12-1/2« 40,75 lb, 14.90 lb. 4.11 lb.
12-1/2» 4d.C0 lb. 14,33 lb. 3.69 lb.
11,39 lb. 42,56 lb.
11,30 lb. 4.1.36 lb.
11.42 lb, 42.61 lb,
10.67 lb, 67.^1 lb.
19,01 lb, 67.75 lb.
18,72 lb. 67.49 lb.
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COHJIDl^ITIAL SHCURITT IH/OR'rlWIOM
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CONFIDENTIAL NPG REPOHT NO« 1117
Ballistlos of Rod-Llka Fragments 3
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5« PROCSOURSi
Eaoh varhtad was placed vartioally on a stand, t or 7 faet high( at tho cantor of tha 30 foot radius fragnont voloeity arena* Tho fragnont valooltioa wore obtained by photographing, vith two (2) high opood eamaras, the detonation of the warhead and the subsequent impacts of tha fragaents on the steel flash plates at a distance of thirty (30) feat* An 1300 r,p»n« synehronoue motor clock, and a glow lanp and a one (1) kilocycle por second gunerator were used to eatabllah the film rates for the oemeras«
A pack of cane fiber-board was used to recover a sanplo of the rode«
After eaoh round the steel flash plates wore photographed to . show tha inpacha, and the lapacts wore then narked so that tha impacts of tha following round i;ould bo diotinguichable* Tho iciga of tho ir.jjact he« boon circled en the photo^rapho, eo that tho lapacti for a einglo round are rocvUly diacorniblo (Pisifrca 6~17)«
6« RESULTS AUO DISCUSSIONi
Ditailod valoclty dr.ta are given in Table X, Apponiix (C)« avorage velocitles wore ao followat
The
IM* 1
Rd0 2
Rd. 3
Rd. 4
Rd,
Rd«
5
6
6-1/2» rods
6-1/2» rodo
i-l/S»« rod»
12-1/2" rodo
12-1/25« rod«
12-1/2« rod»
3560 ft./oec«
3/>'>0 ft,/ooc»
3470 ft«/aoov
3450 ft./ooc»
roloclty uico'od becrAxso of failure of photo^rcphio oquipuont«
3600 ft«/ooo#
3oC0 ft«/eoe«
3560 ft./ooo«
3630 fts/soo«
3*610 ft./coo«
3520 ft«/soc«
Tho avorago value for tho 6-1/2** rods in 3'»ö0 ft«/ooo« and for the lZ"l/2n rod» 3595 ft»/öoo«
The ir.pccta on tho flach plate« wora noaaurod aftor noch round, and theoo Teacjuriroenta are given in Table II, Appondix (D), Photo« of the pl."xtoa ara Incinclod ao Piguros 6-17, inclurfivo« Tha rodo recovered from the canj fibar-board pack ore ehovm In Fi^urya 1U and 19*
CO;J?IP~IITIAL SSGUftiTI IKFORHATION 5
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© COUPISSMTIAL HPQ REPORT NO« 1117
Ballistlot of Rod-Lik« Pra^aent»
f^r*
Th« impact lengths» as moasured on the plates, indieato that a large percsntage of the rods were either tuabling or were tra?ol- ing with the long axis tilted at randoa ansles fron the normal to the trajectory,» Hole dismdious, where given in the table, indicate a complete penetration of the flash plate of the length given«
Neither the impacts on the plates nor the rods recovered indi- cate any break-up of rods oxcopt at the oxtreao ends« The combi- nation of the l/4n deep grooves in which the rod ends wore placed^ and the "singlo-pasa" welding bead at the corners fomsd by the rods and the end platea, olfered greater resistance to the release of the rods than was ozpeoted or desired« This caused the rods to bend and nock down before pulling out of the upper groove and to break at the veld at the louar end« The strength of the loint at the lower end of the rod probably rccentuated the tip-off of the rods, and tendsd to cause tuabling«
It was originally plennod that this first sot of »rfirhoada vould expol rods at a volooity v'.ure it vaa fairly certain tho roda would bo of design lencth« The n«xt step via thon to ba a Eiodiflc&tion of tho proeont (!o3ii;n onlj by incroasinjj tho thiclznoca of th« eEplo- sivo annnluo, until'tho jesÄitaua voloaity for dosica lorjth ro^a was obtained« Horrovor, tho condition of tho rod» ror;ovorod frou this firat firing indicate a that the doaisa of tho w.?,rhoad eußt bo ciiacjed to tioro noarly tpprorinato a "froo-rod^ vnrhoad if tha optiicun recults aro to bo obtainod«
Ono (1) of tho lÄ-l/2rt rods recovered frcra th^ fifeor-boord p^ck was sootionod at n point till ronoved fi.'on tli« endt;« A corico of Knoop hardnooa rocdings wao token acroro this c-sttion, fro^ a point as cloca BO pooclblo to the rod eurff.ca t.lilch h^d baoa toward tho explooivo to thi oiJ'ioaite OUD« Vi:3 valuoo obtained are li. ;iad in Table III and Ficuro 83, r.nd photoclcro-.^r.^ha of tho rod grain structuro nro inrlrubd Gü riguros MO» 21, önd S.l» TUo hnrt'noao of tho rod rr\torlr.l boforo firirf? was noc'vi.'jll D??-, corrs^pon-aing to a Knoop hr.rdnooo nu'-bor of 126 co that thora la oor.o incroaGo of hardnoüa throughout tho rod thickneaa, and a rasir.un hirdcnlns of epprcriuatGly 200 Knoop hardncos nunbara« It is Inlorootin? to note that this hardnio« pattorn clo-aly reooribles that obtained in single rod firings from the "rod guaf
M as sho-in in reforonco (d)«
CONFIDENTIAL SECUam IKFORMATIOM 6
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© CONPIDBNTTAL KPO nSPORT NO. 1117
Ballistics of Rod-Lllt« Frasmonls
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Chemical analysis of ths rod material indicated the following eompositionr
Chgmieal Analysis
& I 1 •22 - .27 .012 - .014
Srwctrograohle Analyei»
21 Ha ££ •16 - «18 «44 - .46 <4Q9
Although this natflrial vis ordered AS AISZ C-1020 stesl, the above anal/ois indicates that it was actually C-1025 ateal.
mut
7. Under the conditions of this teat, 3/Sn a^uar*» rods of fi~l/2* and 12~l/Z* lonstho vore expollaa from cylindrical t.^rhsads at avera-jo volocities of 34C0 ft#/eooe and 3595 ft./siui», rocpsotlvely« The only bro&Icing of the rods occurred at the u~tr0 J* onds.
A ootallui'ßi«Rl oxcaination of tho rods vas oont'utjd, including a dotorninition of tho hardneas pattern or.tor.ding through th<j rod from tho exnloslvo fac« to tho opposite oido» A oo.i^ldorabla a^oont of cold vorhin^ of ths rod ratorlal is ovidont«
The design of the warhead will be chanjjod for future work to more nearly approximate a "free-rod'* i/arhoad«
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CONFIDENTIAL SSCÜRITY INFORMATION
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O CONPIOENTUL
o . . NPO REPORT NO« 111?
BAlllitlos of Rod-tlk« Praga«ni»
The testa upon which this report is based vure conducted byt R« E« McGONKELL, Head Physics Division
Terminal Ballistics Department V» PHILIPCKUK, Head Fragiaentatlon Division
Terminal Ballistics Oepartasnt D« S. PARKER, Metallurgist
Terminal Ballistics Dispartaent
This report was prepared byt R. E* McCONNSLL, Head Physics Division
Terminal Ballistics Department
This report «ras reviewed byt R« H« LYDDAMS, Director of Research
Terminal Dallicties Department W« B« ROBERTSON9 Lieutenant Commander, USN
Terminal Ballistics Officer Terminal fiallietios Department
C« C» BRAM3L3, Director of Researcht Ordnance Group
APPROVEDi J« P. BIRNE Captain, ÜSM Comaander, Naval Proving Ground
E. A« RUCKilER Captain, USN Ordnance Officer By direction
CONFIDENTIAL SECURITY INPORMATIOIt
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6 KPQ REPORT NO* 1117
V« 3, NAVAL PROVING CHOUNO DAHLQRBN, VIRGINIA
Flfteonth Partial Report
on
War! oa4 Charactoristies
Fourth Partial Report'
on
Salllatics of Rod-Liho Fra^nanfeo
Probat No.i 2:rG-.r.e3d-A42-.'.-53 Copy 51 j,. i 14> No. ot Pago51 3
Date* nrv,» i tr ;..' t\ 1 «J i^:;^
CONFIDSHTtAL
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a^i-si.* •i«-'-.U«S.-
o o CONFIDENTIAL NPG ESPORT NO« 111?
Ballistics of Rod-Lik« Prägnants
35nun Fast ax Camera
Rd. 1, Camera 1
6-1/2" Rods
468O fraaas per see«
Prawe in Which Hit Occurred r'pt ,Fi«wwT«toft
33 7
39 14
40 3
41 2
42 1
43 3
Modian
Average
3700
3 600
3510
3WO
3340
3260
3530 ft./oeo.
3560 ft./c^o.
C0HFID3NTUL SiSCURITY IHPORKATIO» APPENDIX C
!
^^w^^.O^N^v^o^ ^>>^ •>. y^M. "• ' - •*»"'• -'• "^•J'"^'". "". ••••"- ■'•"*• •*.'"'■ ^,%^p'- •'
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w—*-'7-:,*%«i>.-^-ü
o o CONPIDSNTUL «PO m?OrAC KO. 1117
Ballistics of Rod-Lik» FrAgmentt
I41?lg I (Q'mU*wa<ÜL
35am Piatax Caaurt
Mf 1, C&r.era Z
6-1/2« Ho.'.a
FrAtiiö in '^hich HSJU .föf^mt-J!
39 7
W 9
41 2
42 * a
43 i
44 i
45 i
M«diAn
Averag«
4680 frarn«» p^r e«c#
VnTnoiVr (r/fl
3600
3510
3420
3340
3260
31V0
3120
5440 rtr/mcj«
3.'v70 fW-'^o»
COüFlOaüTIAL Ai'IC^DiX C
mi A -•■ - . -N -S -'. --. -N\ -V. .'. ...%.-....-,.-..-.
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o C0HFIDBKT1AL
O M?a RSPOÜT KO» 1117
Ballisfclc» of Rod-Llksjmmenti „..•.-
IMI^JLJ SssUaaa^l
35an Fastax Cftaer«
Rd« 2, Cftta«r* 1
6-1/2«» Rod»
Fr&ao in Which
39
40
Al
42
43
44
45
Uo^ian
4670 franco per 8«o*
4
11
5
1
2
1
1
3
3590
3500
3420
3340
3260
3130
3110
34.',.0 ffWsac»
3440 fu*/?'>**
APrEKiJlX C
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o o CONFIDENTIAL NPO RSPORT NO. jLll?
Ballletic« of Rod-Like Fragments
yABIB I (Continued)
35aa Fastax Caaera
Rd« 2, Camera 2
4713 frames per seo«
6-1/2« Rods
Frame in Which Hit i09curred
39
Mo,, F^aRment» I^locilxJ//?).
2 3620
40 11 3540
41 9 3450
42 2 3370
43 2 3290
44 1 3210
45 2 3140
Median 3450 ft./soo«
Avarase 3450 ft./woo.
^
C0IJ?irO?iTIAL SECURITY IIJPORI-SATIOS u??r^i)ix o
^ :.^>^^::N>-.>^-; V^ ■ ^_:i_;j_"."j^;i^'.'^i» ^'^ »«<*. ^V«". •". «vV-iftJ
-.3
o o COMFIDSMTIAL KPG R2P0RT NO. 1117
Ballistlos of Rod-Like Fragments
I^i&JUggn»togdi
35am Faatax Caaara
Kdm Ut Caaera 1
* 12-1/2» Rods
Frame in Which
37
3S
39
40
U
42
43
44
liodian
Avcrags
4730 frames per seo»
4
7
9
5
4 2
2
1
3ß40
3730
3ö40
3550
3^60
3^0
33C0
3n?.o
3S10 fto/coo«
3oC0 ftö/yso.
COiJFIDÜUTIAL sr.cuaiTX 1:: iroiütvriöN r API^:N!0IX C
*"iÄ^^N->>->>i'>>!.s>->:-->>i:.^-y->>>:^^^
■h^^^bfc-^Afr
0 O CONFIDBNTUL
WPG nSPORT HO. 1117
Ballistic« of Rod-Lik« Pragment»
35i&a Fa a tax Camara
Rd# 4, Canera 2
12-1/2» Roda
Fraüi« in Which H^t Onojrrnd..
37
39
40
41
42
Üodian
4763 Jfranea par aao«
6
7
5
2
3
3
3Ö60
3760
3660
3S70
3^C0 Jto/^vc*
SJ
CONPIDr.UXIAt, S&CUHITY IK?0SMATI0N
Ar?EKDIX 0
^>j;j^^^^^^^>;j^^ii^^x^i^^-i^^
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','^**TJf >•?.*-." ^7»*y *^«r •; v^
Q CONFIDSNTUl.
0 NPO RSPOP.T NO« 1117
Ballittlos ofRod-Llke Pragniants
35ma Faatax Camera
Rd» 5f Camora 1
12-1/2« Rode
FJfana In Which
37
3ö
39
40
kl
42
43
»lodian
Avorage
T*v^^ ^ (^«ntlnuedl
4690 fraoes par aac«
3 SCO
3700
3610
3520
3350
3270
36^0 ft#/eac«
3600 ft«/3QC.
^3 »"'3
CONFIDENTIAL S3CURITY INFORMATION
APPENDIX C
^J^^:,O,O.\\OAV>ä\-:>:VS:.V>>:-:V:>V . ■ l>JLa ' ■ '-- '-- '-*
^
o CONFIDENTIAL
NPG BEPORT NO« 1117
Balllatlce of Rod-Ilk« Fragment«
IABL§ I (??yitinuedl
35mm Fastax Camera
Rd» 5» Camera 2
12-1/2» Rod«
CONFIDENTIAL SECURITI INFORMATION
4775 frame« per see«
Frame in Which HO. Occu.rred Vtt fra^ent* SaXss&x (?/?)■
1 37 3Ö70
30 3770
39 3670
" 40 3580
41 3490
42 3410
43 2 3330
44 1 3160
1 Median 3650 ft./eoo«
Average 3610 fU/eee.
8 APPENDIX 0
£>fi>>v^.>y^^^^
T^y- V^l^ 'A'^^ -^'^W^\>L'-'^VVA '*.''J**\*'mms*~,'*.-^w-^vr'.^vny ^^ v^-^
■ —'■ •ViT>~^-^ ■i*,^'^Ä
Is.. .^-A*\^^-' .l*-^
O o COÜFIDENTUL NPG REPORT HO« 1117
Balllaties of Rod-Llfc« Fragments
yAppS I (Contlnu^dl
35nsi Faatax Camera
Rd* 6, Csaora 1 .
la-l/a» Rods
47^9 frame» per eeo«
Frame in Hit. Occi
Which ^9,t. Praenanti.»
38 2
39 11
40 4
41 2
42 4
43 3
44 2
Median
Average
3680
3590
3500
3420
3340
3260
3560 f4«/aoc»
3560 ft./soc«
CONFIDENTIAL SECURITY INFORKATIOM
^i*ä-*iai*i^^ ^I^L--^>^^:^
APPIiNÜIX C
.
■ .ni;y^v-r'Vr.
r» J m^vtmy n
'A.XAiZ^*.:.-.-' -'i^te^ ,^i w^.
0 o CONPIDSNT.UI KPO REPORT NO • 1117
B&lllstles of Rcd-Likt Fragmenta
TABLE I (Continue iU 35na Faatax Caaara 4692 fracas per see»
Rd, 6t Caaera 2
12-1/2» Rods
Frama in Which Hit Occurred Ho. Prartments Mp^y (f/ff)
3700
39 3610
40 3520
41 —* 3430
42 5 3350
43 3270
44 3200
Median 3510 fU/oce,
Average 3520 n#/aoo»
CONFiD^HTIAL sEcuaxxr INFORMATION 10 APPENDIX C
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Paillat.lcs of Rod« •Like Fragments
ww m HARD.fESS VS. DISTANCE ACP0SS ROD CROSS SECTIOW
Dlotanee from Specinon No« C-736 1 K«?» I*?a<l| iot 2^ <?V.1,?9UYA Explosiva - Knoop Faca (vm) „ R-l, £=2 f.tV«. Hardnoss
0*10 868 407 461 320 0.20 855 406 449 336 0,30 850 394 456 326 0.40 865 416 449 336 0*50 865 417 448 338 0,75 872 420 452 332 1*00 873 403 470 308 1.25 870 405 465 314 1.50 865 400 465 314 U75 865 403 462 317 2.00 865 404 461 320 2.25 871 402 469 308 2.50 876 396 480 294 2,75 878 396 482 291 3.00 872 398 474 302 3.25 877 388 489 284 3*50 868 390 478 297 3.75 876 388 488 286 4.00 869 383 486 289 4.25 868 385 483 291 4.50 867 385 482 291 4.75 870 390 480 294 • 5.00 869 389 480 29/ 5.25 863 384 479 297 5.50 661 389 472 305 _. 5.75 864 386 478 297 6*00 855 388 467 311 6*25 866 387 479 297 6.50 866 383 483 291 6.75 875 373 502 269 7.00 907 347 560 216 7.25 910 344. 566 211 7.50 906 347 559 217 7.75 895 347 548 226 8,00 892 348 544 229 8,25 887 347 540 232 8,50 886 345 541 231 8,75 900 318 582 19'.' 8*83 Edgo of Speolraon
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CONFIDENTIAL SECURITY INFORMATION APPENDIX F
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HP9-51571 1 Doceaber 1952 CONP1DEKTIAL SECURITY INPORMATIOH
Photomicrograph of crosa-acctlcn of rod after firing. Explosive fac« is at the left. Dark band at the rlRht is the soft region. (Hltel-plcral etch, 1$X).
Pigure 20
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KP9-515U9 1 n«««rh«r 19^2 C0HPIDCTT1AL 1 Docember 1952 SEoUnm IHPORMATIOH Photomlcrocraph of severely worked ration of rod (left-hand side of PlRure 20) showing considerable effects of o«" J^*i S2 dSk p?Sn8 are poarUte. the Ucht crain. forrlte (Hltal etch, 1000X).
Plcure 21
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HP9-51550 1 Deccmbep 1952 COKPIDnJTIA.T. SECUTtllY TXWRMATIOM
Photomlcrocraph of softer portion of ^ ^J^SLa^'oSld Fleure 20) showing sane twlnnlne and Indicating moderate ooia working, (Hltal etch, 1000X).
Figure 22
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0 COHPIDSMTUL KPG REPORT UO« 111?
Ballistics of Rod-Lik» FVagraorta
DTSTRIBOTION
Bureau of Ordnance
Ad3 Re2 Ro3 Re3d
Chief of Ordnance, Department of the Army Attnt ORDTZ-AR
Commanding General Aberdeen Proving Ground Aberdeen, Maryland Attnt technical Information Section
Development and Proof Services
Commanding Officer Prankford Arsenal Philadelphia, Pennsylvania
Navy Research Section Library of Congress Washington 25, 0« C* (Via BUORD Ra3d)
Bureau of Ordnance Technical Liaison Office Bell Telephone Laboratories Whippany, New Jersey
U« S« Haval Ordnance Test Station, Inyokern, China Lak«, California
Kaval Ordnance Laboratory, White Oak Silver Spring 19, Maryland Attnt Explosives Division
Coamamlkr, Operational Development Force U, S« Atlantic Fleet, U* St Naval Base Norfolk 11, Virginia
Pleatinny Arsenal Dover, New Jereey Attnt Technical Division
1 1 1 5
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CONFIDENT I A», S3CURITY INFORMATION APPENDIX 0
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Ballistics of Rod-Lik» Prägnants
DI3TRIB0TIOW (Continuad^
Inaiiiuts for Cooperativs Research JHU/1315 St. Paul Street Vlat District Chief, Philadelphia Ord. District 1500 Chestnut St., Philadelphia 2, Pa, Attnt Mr. Edward R. C. Miles
APL/JHU Silver Springs, Maryland Attnt Mr» H. S. Morton J
Institute \or Air Weapons Research University of Chicago Chicago, Illinois Viat Director, Office of Naval Research Branch Office
John Crerar Library Building - 10th Floor 66 East Randolph Street Chicago 1, Illinois 1
Locals OTX OTZ OT-1 OT File
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CONFIDENTIAL SECURITY INFORMATION APPSN
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