1、/- S-37-/. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-C-12926E (AR) STANDARDS MILITARY MIL-STD-105 - Sampling Procedures and Tables for Inspection by Attributes DRAWINGS (see 6.4) US ARMY ARMAMENT RESEARCH AND DEVELOPMENT COMMAND ( ARRADCOM)
2、 7549247 - 7549248 - 8886595 - Container, Ammunition, Fiber, M251A1 for 4.2 Inch Mortar Ammo., Assembly, Details and Packina Box, Packing, Ammunition for 4.2 Inch Mortar Ammo., in Fiber Container M251A1 in Jungle Wrap Cartridge, 4.2 Inch, Illum., M335A2 Assembly 3 0 REQUIREMENTS 3.1 Materials. Mater
3、iais shall be in accordance with applicable drawings and specifications. 3 ,- 3.2 Components and assemblies. The components and assemblies shall comply with all requirements specified on drawing (dwg.) 8886595 and with all requirements specified in applicable specification and standards. 3.3 Proving
4、 ground. The cartridge shall comply with the following requirements when tested as specified in 4.5.1. 3.3.1 Functioning. The cartridge shall fire and function satisfactorily (see 6.5) and shall provide effective illumina- tion (see 6.6) for 60 seconds (sec.) minimum (min.) 3.3.2 Premature burst and
5、 security of parts. There shall be no premature burst or evidence of metal parts failure in the bore of the weapon or in the first 200 yards. horzontal range. side the gun bore is not considered a safety hazard. Separation of the cartridge container extension out- 3.4 Ignition cartridge check test f
6、or deterioration. If the total elapsed time between original acceptance of the . 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-C-12926E (AR) - - ._ . ,_ - -.- I. .=-. CI. . ,vu-*- . . - .-._ ignition cartridge lot and the assembly of that lot
7、 into the complete round exceeds two years, or if the ignition cartridge time since previous tests, the ignition cartridge shall be subjected to, and must satisfactorily comply with the tests specified in MIL-C-50513 before the ignition cartridges are assembled into the complete round (see 6.9) . .
8、i, - has been subjected to adverse conditions for any period of 3.5 First article inspection. This specification contains technical provisions for first article inspection. Require- mentS.for the submission of first article samples by the con- tractor shall be as specified in the contract. 3.6 Workm
9、anship. The parts and assemblies shall be free from chips, dirt, grease and other foreign matter that may impair proper functioning. The cleaning method used shall not be injurious to any of the parts, nor- shall the parts be con- taminated by the cleaning agent. .- . -. 4 QUALITY ASSURANCE PROVIS I
10、ONS 4,l Responsibility. for inspection and standard quality assurance provisions. Unless otherwise specified herein or in the contract, the provisions of MIL-A-48078 shall apply and are hereby made a part of this detail specification. . . - . 4.2 Classification of inspection. The following types of
11、inspection shall1 be conducted on this item: a. First article inspection b. Quality conformance inspection 4.3 First article inspection 4.3.1 Submission. The contractor shall submit a first article sample as designated by the contracting officer for evaluation in accordance with provisions of 4.3.2.
12、 This requirement is applicable when loading of projectile and assembly of cartridge is accomplished at the same contractor facility. The first article sample shall consist of fifteen cartridge assemblies. 4.3.2 Inspections to be performed. See MIL-A-48078 and Table I specified herein. 4.3.3 Rejecti
13、on. See MIL-A-48078. a Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-1 MIL-C-1272bE 13 9777906 0294646 9 M nim mm e. Y 1 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- 1 HIL-C-L2926E 13 9979906 02
14、74647 O MIL-C-12926E (AR) 4.4 Quality conformance inspection 4.4.1 Inspection lot formation. Inspection lots shall comply with the lot formation provisions of- MIL-A-48078. addition, inspection lots shall contain: In . a. Loaded items of one lot interfix from one manu- fact urer 1. Projectiles 2. Fu
15、zes 3. Ignition cartridges 4. Expelling charges b. Items from one lot 1. Propellant 2. Bag loading assemblies 4.4.2 Examination. .See MIL-A-48078. Unless otherwise specified in the Classification of Defects and Test tables, sampling plans and procedures for major and minor defects shall be in accord
16、ance with MIL-STD-105, Inspection Level II. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-o a, c .d YI aJ 5 cu c O z 6 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-rl % t rl w I H 3 c 4 ii-i al a
17、 a, c !-IO up: a O PI o b c 4 rl m o) 10 s E : $ -li 10 o x o) w O al u c al a 4 3 M ill 7 q . I. .: Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-C-LZ726E 13 7797706 0274650 O W - rl rl 15 o .A .s.- .-=. *-*.i_._ . - . MIL-C-12926E CAR) 4.4.3
18、Testing. 4.4.3.1 Proving qround. - 4.4.3.1.1 First article. The fifteen sample cartridge assemblies shall be fired in three groups of five rounds each in accordance with 4.5.1. compliance with the criteria specified in Table I. Observations shall be made for 4 . 4 . 3 . 1.2 Produc tion 4.4.3.1.2.1 B
19、eginining with the first lot produced and continuing until three consecutive lots have been found to be acceptable, forty eight sample cartridges shall be randomly selected from each lot for this test. The cartridges shall be fired in three groups of sixteen rounds each in accordance Observatons sha
20、ll be made for compliance with the criteria specified in Table I. .with 4.5.1. 4.4.3.1.2.2 After three consecutive lots have complied . with the criteria of 4.4.3.1.2.1, fifteen sample cartridges shall be randomly selected from each lot for this test. The cartridges shall be fired in three groups of
21、 five rounds each in accordance with 4.5.1. Observations shall e made for com- pliance with the criteria specified in Table I. In the event that three successive lots fail to comply with the requirements the acceptance criteria shall revert to 4.4.3.1.2.1. I 18 n Provided by IHSNot for ResaleNo repr
22、oduction or networking permitted without license from IHS-,-,-MIL-C-L272hE L3.W 7777906 0274bhL 5 MIL-C-12 92 6E (AR) TABLE I Category Critical Major Ma j or Major Ma j or Minor Defect Acceptance Criteria sampie size 48 Accept Reject Premat Ure burst .- o 1 Separation of cartridge container ex tensi
23、on out- side bore of the mortar 2 3 Failure to fire O 1 Functioning 2 3 Effective illumination for 40 seconds or less (see a) Effective illuminating for more than 40 sec. but -less .than 60 sec. (see a) Sample Size 15 Accept Reject O 1 1 2 O 1 1 2 (see b) (see b) a. The.lot shall be rejected if the
24、total number of major and minor defects is 7 or more or the number of major defects is 3 or more. b. The lot shall be rejected if the total number of major and minor defects is 5 or more or the number of major defects is 2 or more. 4.4.4 Inspection equipment. The inspection equipment required to per
25、form the examinations and tests prescribed herein is described in the “Paragraph Reference/Inspection Method“ column in the tables starting with paragraph 4.4.2.1. The contractor shall submit for approval inspection equipment designs in accordance with the terms of the contract. See Section 6 of MIL
26、-A-48078 and 6.3 herein. 4.5 Methods of inspection 4.5.1. Proving ground. The cartridge shall be fired from a 4.2“ mortar for which the round is standard and in accordance with Table II. However, if meteorological con- ditions or time of fuze functioning so dictate, the proving ground shall adjust t
27、he fuze in order to increase the height of burst and insure effective illumination (see 6.6). Obser- vation shall be made for compliance with the requirements 19 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-specified for fuze functioning, failure
28、to fire, premature burst, security of parts, parachute functioning and effective illumination (see 6.6). In addition, muzzle velocity, time of fuze functioning, height of first light, delay time from fuze functioning to chute opening and rate of descent shall be recorded for information only for eac
29、h round tested. Any malfunction occuring during the test shall be reported in the firing record. Meteorological data shall also be reported in the official firing record. TABLE II i Propellant Phase Fuze Setting (sec) Mortar Elevation (mils) 12 . 25 1/2 41. 8.5 26.0 32.0 900 800 800 4.5.2 Refiring.
30、If for any reason the proof director considers the test conditions have detrimentally affected the test results, he shall declare the results invalid and perform a new test. 5. PACKAGING 5.1 Packaging requirements. Packaging shall be as specified on dwg. 7549247. 5.2 Packinq and marking. Packing and
31、 marking shall be as specified on dwgs. 7549247 and 7549248. 6. NOTES 6.1 Intended use. The cartridge covered by this spec- ification is intended for use in the 4.2“ Mortar System. 6.2 Ordering data. . See MIL-A-48078. 6.3 Submission of inspection equipment for design approvals. See MIL-A-48078. Sub
32、mit designs as required to Commander, US Army Armament Research and Development Command, Dover, NJ 07801. ATTN: DRDAR-QAR-, 6,4 Drawings. specification under Development Command Drawings listed in Section 2 of this the heading US Army Armament Research and (ARRADCOM) may also include drawings 20 Pro
33、vided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-C-1272bE 13 7777406 O274663 9 prepared by, and identified as Edgewood Arsenal, Frankford Arsenal, Rock Island Arsenal or Picatinny Arsenal drawings. Technical data originally prepared by these activiti
34、es is now under the cognizance of ARRADCOM. 6.5 Satisfactory functioning. Satisfactory functioning shall be defined as ejection of the parachute and illuminant assembly and proper suspension and ignition of the illuminant. 6.6 Effective illumination. Effective illumination is defined as burning of t
35、he canister without exploding or break- ing up while suspended by the parachute. The time recorded from the appearance of first light from the candle to either (1) burnout of the candle while still in the air (normal burst) or (2) burning of the candle until ground impact. Burning of Che canister af
36、ter striking the ground shall not be considered as Iteffective illumination“. Any occurrences which detract from “effective illumination“ as herein defined, shall be recorded on the official firing record. 1 for “effective illumination“ shall be considered as the time 6.7 Combining of proving ground
37、 tests. When the contrac- tor for the cartridge is the contractor for one or more of the components thereof ,-the proving ground tests of the components may be combined with the proving ground tests of the cartridge, upon agreement between the procuring activity and the contrac- tor. In all cases wh
38、ere the cartridge specification does not cover all the proving ground tests specified for the component, the additional tests specified in the component specifications shall be conducted. make the necessary arrangements to recover all malfunctions which may occur during the ballistic test unless oth
39、erwise directed by the procuring activity. The terrain from the gun site down range to impact shall be suitable so that all rounds fired including malfunctions will be accessible for recovery. 6.8 Recovery of malfunctions. The proving ground shall 6.9 Cost of deterioration check test. The contractin
40、g officer shall arrange to have the contractor reimbursed for costs incurred in the performance of the check test. Custodian: ARMY-AR Preparing Activity: ARMY-AR Project Number: 1315-A345 u.s. GOVERNMENT PRINTING OFFICE: SBI-O-OZFI/ZP i 21 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
