UNCLASSIFIED ^ • ^ JUL 3 0 19^3

1 5 9 1

i ^afe^te.^ ' !

Case No. A33-00 Ref. Sym: 1612 (753) P r o j e c t No. TM-799 F i l e : H-525, 3-2

m. L. A. DUNN - 128i!

Re: Drop Test of t h e H-525 wi thout Shear Pads

Surtnarv of Resu l t s

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An H-525 atomic weapon t r a i l e r wi thout shear pads and wj.th an XW-27 dummy warhead mounted in t h e H-525 atomic weapon t r a i l e r was suo jec ted t o d rop t e s t s t o de te rmine , by drop t e s t i n g , t h e amount of shock m i t i g a t i o n i n h e r ­e n t i n a con ta ine r wiTchout shear pads . Drops a t ^ , 6, 3 , 10, and 12 inches were made without c a s t e r s mounted t o t h e H-525 and a drop from 12 inches was made with c a s t e r s i n s t a l l e d on t h e H-525. F a i l u r e occurred in a l l c a s t e r s dur ing the x 2 - i n c h d rop . No v i s i b l e f a i l u r e s were appa ren t t o the H-525 atomic weapon t r a i l e r or to t h e X\-/-27 dummy warhead a s a r e s u l t of the drop t e s t i n g . For t h e 12- inch drop wi th c a s t e r s , 52 per cen t of t h e 0-peak a c c e l e r a t i o n measured on the t r a i l e r base was t r a n s m i t t e d to the c r a d l e , 110.0 per c e n t of the 0-peak a c c e l e r a t i o n measured on t h e a f t end of t h e c r ad le was t r a n s m i t t e d t o the X\/-27 CG, and A^,B per cen t of the 0-peak a c c e l e r a t i o n measured on the fwd, end of the c r a d l e was t r a n s m i t t e d to the T^-Zl CG. 57 ,0 per cent of the 0-peak a c c e l e r a t i o n measured on t ^ | ( / g j

^"^cc^v

t r a i l e r base was t r a n s m i t t e d t o tne JOJ-27 CG.

3427-1

i^*//

3428-3

Mi. fin For drops without c a s t e r s from . t o 12 i n c h e s , 20 .0 per cen t t o 125-0 per '^^^HL cen t of the 0-peak a c c e l e r a t i o n s measured on the t r a i l e r base was t r a n s ­mi t ted t o the c r a d l e , 21.A per cent t o 50 ,0 per cen t of the 0-peak a c c e l ­e r a t i o n s joeasured on the t r a i l e r c r a d l e was t r a n s m i t t e d t o the CG of the XVT-27, and 8 , ^ per c e n t to 30.0 per c e n t of t h e 0-peak a c c e l e r a t i o n s measured on the base of the H-525 t r a i l e r was ^-r°'^°"^*^'•^^^ ^'i.,'\^ yiT.ov CG of the r W 7 . |Jl_-:^ '2" ' ^ FILEf

Object of Tej t

weapon t r a i l e r The o b j e c t of t h i s t e s t was t o sub jec t an H-525 atomic (wi thout shock in i t i ga t i on^ ^'^ i t s con ten t s to droo tesjbs^ from h e i g h t s of 5'_2,--A , 6, 8 , 10, and 12 inches t o determine t h e amount of shock mi i iga t lOT -* i n h e r e n t in a con t a ine r without shear pads .

This t e s t was reques ted in a Request for r f e t e r i a l s l a b o r a t o r y I n v e s t i g a t i o n , from Leo A. Dunn, 128^, t o Paul H. Adams, 1612, dated February 2 , 1956. John J . Colwell , 128/V-l, was the c o n s u l t a n t .

- /^ PAGECS)

. "^f^^Oj^^^ \\ !! i ^ ^^r^^'^^L'._:./^7^^: J ITT' Ui.CI.ASolFIEI\

Ui\CLASSIFIED * "' ^ Hef. Sym: i a 2 (753)

Mr. L- A. Dunn - 1284 ~2 - Project No. TM-799

Function of Oblect Tgsted

The H-525 atomic weapon t r a i l e r i s a shipping and storage t r a i l e r for the XW-27 or TX-27.

Suromarv of Past Tests.

Previous t e s t s of the H-525 atomic weapon t r a i l e r have been conducted by Depar-taient 1610, The resxilts of these t e a t s are published in memoran­dums, Drop Test of the H-525 Tra i l e r with Albion Casters . Project No. TM-717, Ref. Sym: 1612 (668), hy R. VJ, Sargent, 1612-3, dated January 28, 1958, no instrumentation was requested for t h i s t e s t , and Ramp Test of tJie H-'525. Project No. Tr^-433, Ref, Sym: 1612 (372), ty D. F. Hil lyer and J . H. Stoever, dated January 23 , 1957. The maxirnimi faired v e r t i c a l accelera t ions recorded on the warhead dialing the drops without cas te r s were: 3.7 g a t the CG, 4.5 g a t the fwd. end, ard 3.6 g a t the aft end for the 4-inch drop and the TTwiriTmnn faired v e r t i c a l accelerat ions measured a t the XW-27 CG were 4 ,8 , 4 . 3 , and 5.3 g, respect ively , for the 6, S, and 10-inch drops.

The maximum fa i red v e r t i c a l acce le ra t ions measured on the Xl*/-27 during the 12-inch drop t e s t were: 6.5 g a t the CG, 7.5 g a t the fxiA, end, and 6.5 g a t the a f t , end.

These t e s t s were conducted in accordance with SCS-5, paragraph 3 . 4 . 1 . The only f a i l u r e noted dtiring these t e s t s was the fa i lu re of the H-525 t r a i l e r cas te r s during the 12-inch and 4-inch drop t e s t , respec t ive ly .

Setup for Test

Figure 1 shows setup for the drop t e s t s without cas t e r s .

Figure 2 shows setup for the drop t e s t with cas te r s . Components t e s ted were:

1 . H-525 atomic weaoon t r a i l e r , Dwg. No. DS(1284)61314, Ser ia l No, 6.

2 . X'J-27 dummy warhead, Dwg, Wo. 125564.

3. Albion cas t e r s , Dwg. No. 136987.

Test equipment used:

Consolidated - Power supply and amplif iers . Type 2-105, Serial "o. ^03Y8. _^

UNCLASSIi ii ^ ./

U l S U L f ^ b ^ . l i ^ l E D Ref. sym: I6l2 (753) Mr* L* A. Dunn, 128U - 3 - Project No. TM-799

Consolidated Oscillograph, Type 5-llii-P3

Se r i a l No. 5O8AM13

Quick Release Mechanism

Foijr Cable Sling

Stathpjn accelerometers used for the t e s t are l i s ted in Table I and shown in Figures 1, 2, and 3»

Procedure

The j ^ s i c a l arrangement for the drop t e s t i s shown in Figures 1 and 2 , A four cable s l ing was attached to a chain h o i s t through a quick re lease mechanism, and connected to the H-525. The H-525 atomic weapon t r a i l e r without shear pads and the contained XW-27 duimny warhead was raised to the proper h e i s t s , released by means of the e l e c t r i c a l quick release mechanism, and allowed to impact on the concrete f loor . The t e s t un i t was aberrated from a l eve l posit ion in order t h a t the af t end would impact before the fwd. end. This was done by having the fwd. end about 3 A " higher than the af t end when in the drop pos i t ion .

Drops were made from h, 6, 8, 10 and 12 inches without c a s t e r s . The cas te r s were then mounted on the H-525 and a 12-inch drop was made. Visual inspection procedure was followed for a l l drop t e s t s . During the 12—inch drop t e s t with cas ters mounted a f a i l u r e occurred as shown in Figure h and t e s t ing was concluded.

Res\ilts

For the drops made without c a s t e r s . Figures S, 6 and 7 are p lots of the per cent of the O-peak accelerat ions measured on the t r a i l e r base t ransmit ted t o the cradle vs drop h e i ^ t , per cent of the 0-peak accelerat ions measured on the t r a i l e r cradlB transmitted to the Xff-27 CG vs drop height , and per cent of the 0-peak accelerat ions measured on the t r a i l e r base transmitted to the XW-27 GC vs drop b e i ^ t respect ively . On the basis of the plots i t appears t h a t when dropping an H-525 t r a i l e r without shear pads or c a s t e r s , from neights of from U to 12 inches tha t 20,0% to 125.C^ of the accelerat ions measured on the base of the H-525 t r a i l e r w i l l be transmitted to the t r a i l e r c rad le , 21,U^ to 50.C^ of the accelerat ions measured on the t r a i l e r cradle w i l l be transmitted to the CG of the XW-27, and 8.9^ to 30.0^ of the accelerations measured on the base of the H-525 t r a i l e r w i l l be transmitted to the XW-27 CG. For the 12-inch drop with c a s t e r s , 52,0 per cent of the 0-peak accelerat ion measured on the t r a i l e r base was transmitted to the cradlw, 110,0 per cent

1594

la*. L* A. Dunn, 1281i ~ h ~ Project No. T>t-799

of the 0-peak accelera t ion measured on the a f t end of the cradle was t ransmit ted to the XW-27 CG, and U9,8 per cent of the 0-peak accelerat ion measured on the fwd. end of the cradle was transmitted to the XW-27 CXJ. 57,0^ of the 0-peak accelera t ion measured on the t r a i l e r base was t ransmit ted to the XW-27 CG. No damage was manifest t o v i sua l inspection during and af ter a l l drop t e s t i n g v/ithout the cas ters mounted t o the H-525. During the 12-inch drop with casters mounted to the H-525, fa i lure occurred in the s t r u c t u r a l members of a l l cas te rs as shown in Figiipe h» Table H tabula tes the acce lera t ions , r i s e times and pulse durations measured during the drop t e s t s . I t should be noted tha t the accelerometers used to measure the accelerat ions are a seiamic mass type accelerometer and therefore have a f l a t frequency response to approximately 0,6 the i r na tura l frequency ( i . e . , any accelerat ion measured a t a frequency in excess of 0,6 the na tu ra l frequency of the accelerometer w i l l be a t tenua ted) , Figiu^e 5 i l l u s t r a t e s typ ica l oscillograph records of the drop t e s t without c a s t e r s . Figure 6 is the oscil lograph record of the drop t e s t with cas ters mounted on the K-525.

/^ lO ^ '^y-^^'^^nTC R. W. SARCSNT - 1612-3

Approved by; ' r , H. ADAiS - 1612

RWS; 1612-3 s mad

Dis t r ibu t ion : a/5A - L. A, Dunn, 1231; J^$k - W. A. Gardner, l6lO a/5A - D. M, Bruce, 1282 vil/5A - C. L. Gomel, 5523 jr/5A - R, K. Smeltzer, 7221-3

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UNCLASSIFIED

FIG. I — H-525 TRAILER WITH THE X\S-27 DLMMY ^ARHE/" D SUPFORTED IN POSITION FOR DROP TEST .VITHOLTT CASTERS — DROP TEST OF THE H-525 WITHOUT SHEAR PADS.

-5 -REF. SVT/: 1612 (753) PROJECT NC, B ' -799

'I Ux'-s v^ '^- j i -^ fO^ i-JL FIED

A ^ UFIED

FIG. 2 — H-525 TRAILER .VITH CARTERS INSTALLED SUPPCPTED IN POSITION FOR DROP TEST -DRCP TEST OF THE H-525 WlTHOLn SHEA'R: PADS.

REF. SY^.': 1612 (753) - ^ PROJECT NO. -^1-799

•

UNCLASSIFIED

UNCLASSIFIED

f l G 3 — H-525 TRAILER MND XW-27 DLIVY .VA^HE/ D I N S F R U ' E N T A T E D FOR DPCF TEST — D= Cf TEST CF THE H-525 .VITHCUT SHE/F F A D S .

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PEF. SV^': 1612 (753) FRCJECT NC . Tf.'-799

•

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FIG A _- TYPICI G/.STEP FAlL i rL 1 :CLF •EX) DLPirjG THE 12-K--CH • ipCF -MTH C>.STEPS - D CF TEST OF THE H-525 ;IT-CUT

SHEAR F,J)S.

^^lolL^x^ - 8 -PEF. SY . : 1612 (753) PPCJECT NC . Tr/-799

UNCLASSIFIE

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U-INCFDRCP WITH CASTERS

FIG. 9 — TYPIC. L CSCIlLOGPMfH PECCf D CF THE DPCP TEST .VITH CAriEPS VOUNTEI} CM THE 1-525 — DPCF TEST CF THE H-5P5 .ITHCLTT iHOF Pf-DS.

-13-PEF. SV: 1612 (753) r COECT ^'C. T7'-799

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IJ1> ' X l ILD iWf. Syni 1612 (753) P r o j e c t No. TM-799

TABLE I

ACCii:LERO>ETKRS USE) DURING DROP TEST OF THE H-525 WITHOUT SHKAP. PADS

\su

1 2 3 A 5 5 6 7 8 9

Vert . , T t r t . , Lonj?., Vert . , Vert . . Vert . , Vert . , Ver t . , Vert . . U t . ,

Location

?wd. Trailer Bftse rwd. End XW.27 CG r i -27 FVi, Trailer Cradle Aft . Trailer Base Aft , Trailer Base Aft. Trailer Cradle Aft XW-27 CG XW-27 CG XW.27

Seria l

3 ^ 2 15 A

1669 3999 3989 5379 153

6020 6018 1665

Model No.

A5A-. 500-2 500 A5A-500-700 A5A-aOO-335 A5A-500-350 A5A-500-350 A5A-1000~350 A5A-500-700 A5A-500-350 A5A-200-350 A5A-200-335

Natural Frea.

1000 1500

9i;o 1500 2100 1500 lAOO 1500

820 9^0

B&Mfi

+500 +500 +200 +500 +500

+1000 "+500

+500 +200 +200

I'lg.

1 1»2,3 1 , 2 , 3

1 2 .3

3 2 .3

1 . 2 . 3 1 , 2 , 3

2 ,3

Teat Uaed

All dropa except 12" drop with caatore All Drops All Drops All Dropa i" , 6", 3" , and 10" Dropa 12" Drop with Caatera All Dropa All Drops All Drops All Dropa

UKCLASSIPiiiD Rsf. Sy»i 1612 (753)

Vert. Vert. Lon«. Vsrt. Vsrt, Vert. Vsrt. Vsrt. U t .

Vert. Vert. Long. Vert. Vert. Vert. Vsrt. Vert. Ut.

• -15-

TAR2.R II

MAXIMUM ACCK.KRATIONS MSASURKD DURING DROP TOST OF

- Pwd. Trailer Base - fwd. Rnd XW-27 - CO XW-27 - rwd. TrsUer Crsdls - Aft . Trai ler Bsss - Aft . Trai ler Cradle - Aft . Rnrt IW-27 - OG XW-27 - OG XW-27

r Pwd. Trai ler BsM - rwd. Kad XW-27 - OG XIM7 - Pl«d, Trai ler Cradls - Aft . Trai ler Bass - Aft . TraUer Cradle - Aft . Kol XW-27 - CO XW-27 - CO XW^7

Max. +

160 75 18 80

120 95 54 36 30

160 75 25

UO ido

96 50 id 12

MiT. -

80 25 22 i5 20

150 30 0

39

152 iO

0 0 0 0 0 0 0

^- loch Dron Max.

Flair ed Pulss

+160 +75 -17

— +120

— +5X +36 -30

Riss Tlas IMBI

1 2 1

1

2 2 1

S-Tnoh Dron

+160 +75 +25

+U0 +480

+96 +50 +48 +12

1 1 4 1 6 2 2

THE H-525

Pulss Duration

2 5

12

2

12 3 2

1 4 2 8 7

10 8 7 1

project No. TM-799

TRAILHI WITHOUT SHEAR PADS

Max. +

200 100

30 150 156 180

85 40 30

240 85 25

125 620 160

50 55 20

Max. —

(i)

100 25 32 90 40

175 40

0 40

176 25

0 0 0 0 0 0 5

6-Inch Dron i^x.

Falrsd Pules

(8)

+200 +100

-30 —

+156 —

+85 +30 -35

Rise Tins

1 2 1

1

2 1 1

lO-Innh Dron

+?;o +85 +25

+125 +620 +160 +50 +55 +20

1 1

10 1 1 1 2

Pulse Duration

/

2 4

10

2

11 24 2

1 3 2

20 6 1 4 2 1

positive vsrtioal acoslsrations ara up. ' Positive longitudinal aoo«lsrations ars toward ths fwd. and. Positive lateral aooslaratlont ars toward the right i^nd aida looking into tbs fwd. snd of ths }'W-27.

-16 -

Z'^xil l^LJ TABLE I I (Continued)

Ref. Sym: 1612 (753) Project No. TK-799

HAXn-iUM ACCLiiRATlONS MEASURED DURING DROP TEST OF THE H-525 TPAILiiR WITHOUT SHEAR PADS

Ver t . Ver t . Long. Vert , Vert . Ver t . Ver t . Ver t . U t .

Ver t . Long. Ver t . Ver t . Ver t . Ver t . Ver t . La t .

^ c a t i o Q

- Pwd. T r a i l e r Base - i wd. Eod XW-27 - CG XW-27 - JNd. T r a i l e r Cradle - Aft , T r a i l e r B^ise - Aft. T r a i l e r Cradle - Aft. End XW-27 - CG XW-27 - CG r^-27

- ?wd. Rnri XW-27 - CG XW-27 - ^Jd. T r a i l e r CraCle - Aft, T r a i l e r Cradle - Aft . T r a i l e r Baae - Aft , Snd IW-27 - CG XW-27 - CG rv-27

Max. +

(e)

2d0 100

38 170

- . 250 100

75 50

12-Iiich DroD .

Max, —

(g)

172 50 50

120 - «

350 50 57 50

Max. Fa i r ed Pulae

(g)

+280 +100

-50 — — - .

+100 +75 +30

Riae Tine

1 2 1

— - . — 1 4 2

Pulae Durat ion _ ( M )

1 4

11 — — - « 12 14

4

. . . 12-Incb DroDWithCt tBt s ra . _

73.9 27 .9 9 3 . 6 42 .5 81 ,7 42 .3 46 .6 lA.O

23 .1 20 .3 50.5 29.5 55.3 2 6 . i 14.0 13 .7

41 .6 18 .5 30.a 35.7 40 ,1 38 .3 27 .5 1 3 . 4

6 6 1 1 1 3

10 2

19 16

4 3 3

15 35

5

NOTEi The acceleroiaetera uaed are a aeiaaic aaaa type acce le r -ou-ieter and, therefore, have a f l a t frequency responae to approximately 0.6 the natural frequency of the accelerometer.

M5

Positive ver t ical accelerationa are up. Poaitlve longitudinal accelerationa are tov;ard the fwd. end, Poaitlve la tora l accelerat ions are toward the r igh t hand side looking in to the fwd. end of the XW-27.

V -v > i - d . . i . X. X -tlj, X-^