UNCLASSIFIED

AD268 164

ARMED SERVICES TECHNICAL INFORON AGENCYARLINGTON HALL STATIONARLINGTON 12, VIRGINIA

UNCLASSIFIED

NOTICE: When governent or other drawings, speci-fications or other data are used for any purposeother than in connection with a definitely relatedgovernment procureent operation, the U. S.Government thereby incurs no responsibility, nor anyobligation whatsoever; and the fact that the Govern-ment may have forulated, furnished., or in any waysupplied the said drawings, specifications., or otherdata is not to be regarded by implication or other-wise as in any anner licensing the holder or anyother person or corporation, or conveying any rightsor permission to munufacture, use or sell anypatented invention that may in any way be relatedthereto.

.0OY-T*-G-47 NOVEMBER 19S1

AINUUTISS TEST KMTcam_ SERVICEABILITY AND

FUNCTION TEST OFPRIMER DETONATORs M14

SERVICEABILITY AND FUNCTION TEST

OF

PRIMER DETONATOR, M14

by

James L. Higgins

PUBLICATION REVIEW

This report has been reviewed and is approved

AE .PERESICKChief, Eragineering T rest Division2705th Airmunitions Wing

NOVEMBER 1961

2705TH AIRMUNITIONS WINGOGDEN AIR MATERIEL AREA

AIR FORCE LOGISTICS QWMANDUNITED STATES AIR FORCE

Hill Air Force Base, Utah

OOY-TR- 51-47

NOTICES

The information furnished herewith is made available for studywith the understanding that the Government's proprietary interestsin and relation thereto shall not be impaired. It is desired thatthe Judge Advocate's Office, (WCJ), Aeronautical Systems Division,Wright-Patterson Air Force Base, Ohio, be promptly notified of anyapparent conflict between the Government's proprietary interestsand those of others.

The conclusions and recommendations made in this report are notto be considered directive in nature. This type information becomesofficial only when published in Technical Orders and/or other appli-cable Air Force publications.

ii

OOY-TR-61-47

ADMINISrRATIVE DATA

PURPOSE OF TESTs

The purpose of this test was to determine the serviceability ofthe Primer Detonators M14 stored in two overseas and two Zone of

* Interior Ammun. tion Depots.

* MkNUFACrURERt

Picatinny Arsenal, NJArkansas Ordnance Plant, Arkansas

FEDERAL STOCK NUMBERS:

1325-028-5634-G300 Non-Delay1325-028-5632-G302 .011325-125-0665-G299 .0251325-301-1115-G305 .10

.1325-028-5636-G306 .24

DRAWING, SPECIFICATIONS AND TECHNICAL ORDERS:

Drawing Number 73-8-70Specification MIL-P-2D365ATechnical Order IlAl-1-7

SECURITY CLASSIFICATION:

Unclassified

DATE COMPLETEDo

9 August 1961

TEST CONDUCTED BY:

OCAMA (OOYET - Test Branch, Engineering and Test Division)

Test Directors Hoyt 0. Brown, Major, USAF

Project Engineers James L. Higgins, Electronics Engineer

iii

OOY-TR-6 1-47

DISPOSITION OF SPECIMENS$

All metal parts generated were inspected and certified inert andthen turned over to the Redistribution and Marketing Division inaccordance with Technical Order 11C3-1-3 and HAFER 136-2.

iv

OOY-TR-61-47

ABSrRACT

The purpose of this test was to determine the serviceability ofPrimer Detonators, M14, stored at two Air Force Anurnition Depotsoverseas and two U.S. Army Ammunition Depots within the United States.

These detonators are used in conjunction with bomb tail fuzes (MI100,Ml60 and M190 Series) and consist of five delays. Samples wereselected from 28 lots stored at depots, which were considered to bethe best storage conditions and representative of various climaticconditions.

All primer detonators were visually inspected, function testedand the time delays recorded. Only 3 out of 28 lots were withinspecification.

Based on the results of this test it is recomended thata Alllots of the delay type Primer Detonator, M14 manufactured in 1945by the Arkansas Ordnance Plant (AOP) be declared unserviceable; LotsPA-24-10, PA-35-15, PA-24-16 and PA-35-19 (delay type) manufacturedby Picatinny Arsenal be declared unserviceable; and Lots PA-26-10,PA-26-32 and PA-26-36 (non-delay) also be declared unserviceable.

v

OOY-TR-61-47

TABLE OF CONTENTS

PAGENotices . .... . . . . .. . . . .. lAdministrative Data . . . . . .. . . . .;Abstract .i.e. D . . . . . . . . . . . . . . . . . . . . . .

Table of Contents . . . . . . . . . . . . . . . . . . . . . . . viIntroduction . . . . . . . . . . . . . . . . . . . . . . . . 1Description . . . . . . . . . . . . .. . . . .. 1Figure 1 sc 0. . . . .. . . . . . . . . . .. . . . . 2Figure 2 .. i . . . . . . . . . . . . . . . . . . . . . . . 3Equipment .. .. .. .. .. .... . . .. .. 1

Figure 3 . . . . . . . . . . . .. .. 4Figure 4 . . . . . . . . . . . . . . . . . . . . . . . . . . 5Figure 5 .............. ...... .... 6Visual Inspection *.. .. .. .. . . . . . ......... 7Function Testing . .. .. .. .. .. .. .. .. .. .. ... 7Test Results . .. .. .. .. .. .. .. . .. 6. . .. ... 8Table 1 .. .. .. .. .. .. .. .. .. .. .. . .. • • • 9Table 2 .. .. .. .. .. .. .. .. .. . .. 0. . .. ... 10Figure 6 .. .. .. .. . . .. .. .. .. .. . ..... 11Conclusions . .. .. .. .. .. .. .. .. .. .... . 12Recommendations . .. . *. .. . ... .. .. . 12Distribution List .. .. .. .. .. .. .. .. .. .. . .. 14

vi

OOY-TR-61-47

I NTRODUCT ION

The purpose of this test was to determine the serviceability ofall lots of Primer Detonators, M14, stored at two Air Force overseasammunition depots and two U.S. Army ammunition depots within theUnited States.

Test Diiective OOY-52-60 was established to accomplish the test.The directive was prepared by the Explosives Evaluation Branch (OOYEE),and tests were conducted by the Test Branch (OoY5T), Engineering andTest Division (OOYE), 2705th Airmunitiona Wing (OOY), OOMA.

Test samples were obtained from the following inatallationesSt Mihiel Ammunition Storage Station, France; Anderson Air Force Base,Guam; Sierra Ordnance Depot, California and Anniston Ordnance Depot,Alabama.

DESCRIPTION

Primer Detonators, M14, are used in conjunction with bomb tailfuzes (M10, M160, and M190 Series) and are available in five delays;non-delay, .01, .02:, .10 and .24 seconds. The primer detonatorsare interchangeable in order to obtain the desired delay.

Upon impact of the bomb, the firing pin in the tail fuze strikesthe M39 Primer. The flame from the exploding primer ignites thedelay charge, which burns the required time, and ignites the ignitercharge. The igniter charge functions the relay charge which explodesthe M1? detonator (Figures 1 and 2).

EQUIPMENT

The following equipment was used to accomplish the tests

Firing Jig (Figures 3 and 4)Potter Electric Counter (Figure 5)C-6 Press Camera

OOY-TR-61-47

0 m~

2~

OOY-TR*b6l-47

Tetryl (1.24 Grains)

Detonator Relay Charge (Lead Aside)Holder

Washer

Percussion

M17 Detonator

-Delay Charg'eLead Aze /-(Black Powder)

(3 .35 rainz- 1 ;iter Charge(Black Powder)

FIGURE 2. Prxiu,,: Detozcstor, 1414, Assembly

3

OOY- TR-6 1-47

4 FIGURE 3. Test Stand.

RIOLADING LANYARD

F1iig jig for obtaining Kfunction data and time delayUNEof the M14 Primer Detonator. (9"X1"

FIRINGOPINN

PI SETR 0-W

Load (036w x 30FI URE

CLAMPPIE ETW

OOY-TR-6 1-47

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6

OOY-TR-61-47

VISUAL INSPBCrIO

All primer detonators (1378 samples) were externally inspectedfor correct marking, physical damage, rust, corrosion or other dete-rioration. Fifteen per cent of primer detonators were disassembled(except for the M39 Primer) and the compoent parts inspected forany deterioration and completeness of assembly. These were reassem-bled for function testing.

FUNCTION TESTING

Eighty-five per cent of the total samples of primer detonatorswere function tested with the Ml? detonator removed in accordancewith specification MIL-P-20365A. The remaining fifteen per centwere function tested intact for comparison purposes with primer det-onators with the M17 detonator removed. The following criteria wasused to determine the serviceability of the primer detonators asspecified in specification MIL-P-20365A.

NON-DELAY.

The maximum allowable time delay of the non-delay primer det-onators is .003 seconds.

DELAY.

The allowable mean square deviations when measured from theapplicable time delays are as follows for primer detonators loadedwith one of the indlicated time delays.

DELAY MEAN SQUARE DIVIATIN, MAXIMUM.01 6.25 Square milliseconds.025 12.25 Square milliseconds.10 1.7 Square centiseconds.24 5.0 Square centiseconds

The mean square deviation shall be computed as followss

The deviation or difference of each sample delay is obtainedfrom the desired average delay. The squares of these deviations areadded and divided by the number of sample delays. The quotient is themean square deviation. A sample which fails to function is not includedin the computation of the man square deviation. The failure ratecannot exceed one in thirty.

7

OOY-TR-61-47

TEST RESULTS

The visual inspection revealed no defects except for a slightamount of rust on the delay holder and detonator holder of some ofthe primer detonators. This deterioration was present on approxi-mately 2 per cent of the 1378 primer detonators tested and was notprevalent in any one lot nor did it affect the functionability ofthe test samples.

Table 1 contains the data on time delay and functionabilityof delay type primer detonators. Table 2 contains similar data onthe non-delay primer detonators tested.

All failures were complete in that the primer did not functionand therefore neither the delay element or detonator functioned.In no instance did the primer function and fail to cause completefunctioning of the remaining explosives contained in the primerdetonator. Figure 6 shows an expended M14 Primer Detonator.

All lots of delay type primer detonators tested exceeded thespecification limits with regard to time delay (Table 1).

Three of the six lots of non-delay primer detonators exceededthe specification with regari to time delay. Two of the remainingthree lots of non-delay detonators met the specification with regardto failure rate and time delay. The sixth lot (PA-26-14) was sat-isfactory for the fifteen samples tested, however, at least thirty(30) samples should have been tested in order to obtain a definiteconclusion (Table 2).

8 ;

OY- TR-6 1-47

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OOY-TR-61-47

**FUNC-SAM- TION TPLE FAIL- TIME DELAY MFG

LOT NUMBER SIZE URES *MAX AVG STORAGE LOCATION DATE

PA-26-10 40 0 .008 .006 St Mihielg France 7-53

PA-26-32 72 3 .009 .008 Anderson AFB, Guam 2-54

PA-26-36 74 3 .008 .008 Sierra Ord, Calif 3-54

PA-26-14 15 0 .003 .002 Anniston Ord, Ala 8-53

PA-26-40 110 1 .003 .002 Sierra Ord, Calif 8-53

AOP-80-23 30 0 .003 .001 Anniston Ord, Ala 3-54

TABLE 2. Results of Tests conducted on Non-delay Primer Detonators.

* Maximum allowable time delay is .003 sec. There is no minimumfunctioning time (ORD-SIP-M6-101)

* The allowable failure rate is one in 30 (MIL-P-20365A).Only 15 samples were available for testing from Lot PA-26-14.

10

OOY-TR-61-47

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OOY-TR-61-47

CONCLUSIONS

It is concluded thats

All lots of delay type Primer Detonators, M14,'tosted andmanufactured by the Arkansas Ordnance Plant (AOP) in 1945, exceededspecification limits and therefore are considered unserviceable.Eight lots also exceeded the failure rate limit. Four lots of delaytype Primer Detonators, M14, manufactured by Picatinny Arsenal (PA)in 1950 and 1955 exceeded specification limits and are considered'unserviceable. One lot also exceeded the failure rate limit.

Three of the five lots of non-delay Primer Detonators,M14, manufactured by Picatinny Arsenal in 1953 and 1954 exceeded thespecification limits and are considered unserviceable. Two of thesethree lots also exceeded the failure rate limits. One lot (PA-26-40)was satisfactory in all respects. The fifth lot (CPA-26-14) wassatisfactory for the fifteen (15) samples tested, however, at leastthirty (30) detonators should have been tested before a definiteconclusion is made.

RECCMMENDAT IONS

It is recommended thats

1. All lots of delay type Primer Detonators, M14, manu-factured by the Arkansas Ordnance Plant (AOP) in 1945 be declaredunserviceable.

2. Primer Detonators, M14, .025 second delay, Lot NumberPA-35-15, manufactured in 1950, be declared unserviceable.

3. Primer Detonator, M14, non-delay, Lot Numbers PA-26-10,PA-26-32 and PA-26-36, manufactured in 1953 and 1954 be declaredunserviceable.

4. Primer Detonators, M14, non-delay, Lot Numbers PA-26-40and AOP-80-23, manufactured in 1953 and 1954 be considered serviceableand available for issue and use.

5. At least fifteen (15) more samples of Lot PA-26-14,manufactured in 1953 be tested in order to determine serviceabilityas defined in MIL-P-20365A.

12

OOY-TR-61-47

6. A world-wide inventory be accomplished for all PrimerDetonators, M14, (all delays). Inventory should include location,quantity, lot number and manufacturer's initials, delay and date ofmanufacture. From this inventory suitable size test samples shouldbe selected and further testing conducted. Additional testing willbe necessary to determine the serviceability status of Air Forcestocks.

13

OOY-TR-61-47

DISTRIBUTION LIST

1 Dep IG of Safety, Hq USAF (AFIGS-B), Norton AFB, Calif1 Hq USAF (AFMSS-AE), Wash 25, DC1 AFLC (MCMTC), Wright-Patterson AFB, Ohio1 Dot 4, ASD (ACR), Eglin AFB, Fla2 AU Lib, Maxwell AFB, Ale1 USAFA, Colorado Springs, Colo10 ASTIA, Arlington Hall Station, Arlington 12, Va1 ASESB, DOD, Wash 25, DC1 Bureau of Naval Weapons (Mtal Div), Dep of the Navy, Wash 25, DC1 Ord Fld Safety Ofc, Box 600, Jeffersonville, Ind1 Ofc of the Ch of Ord, Dept of the Army (ORDGU-SA), Wash 25, DC1 Ord Ammo Comd (ORDLY-Q), Joliet, Ill1 Pictinny Arsenal (Tech Lib), Dover, NJ1 00 US Naval Torpedo Station (QEL Tech Lib), Keyport, Wash1 Hq AFSC, Andrews AFB, Md11 OOAMA, Hill AFB, Utah (l-OOY, 1-OOYIT, 1-OOYS, 1-OOYET, 5-OOYEE,

1-OOYID, 1-(K)1 ASD, Wright-Patterson AFB, Ohio1 TAC (Dir of Requirements), Langley AFB, Va1 SAC (DM4E), Offutt AFB, Nebr1 ADC (ADUME-DE), Ent AFB, Colo1 ATC, Randolph AFB, Tex1 USAFE, APO 633, New York, NY1 PACAF, APO 953, San Francisco, Calif1 AMFEA, APO 10, New York, NY1 AAC, APO 942, Seattle, Wash1 NGB (NG-AFMS), Wash 25, DC1 QeLAB, Naval Ammo & Net Depot, Seal Beach, Calif1 QeLAB, Naval Ammo Depot, Concord, Calif1 Naval Ord Test Station, China Lake, Cali:1 R-l, Naval Propellant Plant, Indian Head, Md1 WEL, NAD, Crane, Ind

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