1、MIL-C-I.lgOgA (PA) Amendrriei-it 2 11 Mar 76 SUPERCEDING Amendment 1 4 October 1974 MILITARY SPECIFICATION CARTRIDGE, ILLUMINATING M301A3 LOADING, ASSEMBLING AND PACKING WITH FUZE, TIME: M84A1 FOR 81MM MORTARS Thls Amenmenb forms a part of Military Specification ML-C-1490gA (PA) dated i5 March 1971.
2、 Paragraph 2.1 APPLICABLE DOCUMENTS 1. Mlltary Specification MIL-P-46568 change M71A1E1If to read 11M71A211. 2. Drawings 9220705 change 11M301A3Eln to read t1M301A3f1. Paragraph. 3.4,2 - Amend paragraph to read: ff3.4.2 tail cone shall separate from the body tube assernblyhf1 Fuze/Separation.-The fu
3、ze shall function and the Paragraph 4.2 - Inspection provisions - lot formation Delete Il4.2.1 C. Loaded time fuzes from one interfix lot number from one manufacturer“ and substitute: If4.2.1 c. Loaded time fuzes from not more than two serial lots of one lot lnterfix number from one manufacturerff .
4、 6 Paragraph 4.2.1.2 Submission of Ballistic Assemblies Under Irbt1 change llFourteentf to “Twenty-onet1 . Q Paragraph 4.2.1.4 Cartridge Functioning (First Article Ballistic Testing) Delete IfIfteen: and substitute Ifourteenf1. Add to end of paragraph: “The final 7 remaining 8anpleS shall be conditi
5、oned for a minimum of 4 hours at zero degrees F-enhet and fired at this temperature, charge 8 increment, with fuze setting to achieve burst height of 300-500 meters. Evaluation shall be made for fuze functioning and candle and parachute performance. for fuze function time per ML-STD-414. No evaluati
6、on shall be made PSC: 1315 . Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-I +I Paragraph 4 . 2.2 . 1 Cartridge prior to aseinbly . Delete the word8 Itand adapter“ In title. fi Paragraph 4.2.2.2 Holder, increment, front. Delete entire paragraph wlt
7、h no substftutlon. it Paragraph 4.2.2.3 - Cartridge Assembly Delete Critical defect It#4 propellant increment mssing It and add under 100% inspectlan. ltMajor 102. Propellant increment-7 missing Visual 03004“. Amend Critlcal Defect #5 to read: 115. Fin assembly broken or cracked (see 6.11) . Visual/
8、Manfie 03005tf Add tne following new Major defect: I11O9 Holder increment finger broken. . .Ylsual 03027t1. Paragraph 4.2.2.5 Sealed fiber container prior to wax Jungle wrap . Minor defect 204 add -Itor improperly oriented“. Paragraph 4.2.2.6 Sealed fiber container after waxing. Minor defect 201 ad
9、lor Improperly oriented1! Paragraph 4.2.2.7 Sesled wood packing box (see Bwg. 9241849). Add new Maj or defect ; “104. Absence of firing table (see dwg 7?41849), . Visual 07008tr. Paragraph 4.2.3.3.2 Proving Ground Testing. Under Table I, change Major defect (Code 03022) to read: “Major Fuze non-func
10、tion or non-separation of cartridge Accept 2 Reject 3“ 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MJL-C-1490gA (PA) Amendment 2 For Note 3 change 1t03021f1 and t1030!21t to n03025t1 and Ad the following new Note 4: lr O 30 26“ respect lvely .
11、ltNote 4: If a cartridge functions properly in all respects with the exception that the “effective illuminationt1 time is le8s than aixty (60) seconds because the illuminant an8 parachute assembly hit the ground while still burning and If the burst height, that Is, the height above ground level at w
12、hich the tail cone separated from the tube body was less than 457 meters the performance of the cartridge will not be considered in evaluating the acceptability of khe lot Por defects 03025 and 03026.! Paragraph 4.3.2 Proving Ground. Add the following special pre-testing procedure for charge 8 balli
13、sic testing at the end of paragraph 4.3.2. ltPre-test procedure for charge 8 ballistic testing-(a) Five rounds frein each lot submitted for ballistic acceptance shall be fired at approx. 1068 mls (or 60 degrees) quadrant elevation at th 30 second fuze setting. The five spotter rounds are in addition
14、 to the normal ballistic sample size. (b) The Proving around shall compute the mean burst height for %he five rounds. (c) Determine If the mean burst height falls within a 514/782 meter range for the five rounds. Adjust quadrant elevation if necessary to the above mean range of burst height and proc
15、eed to test the entire lot ballistic sample at this elevation. (d) Metro data consisting of air density, temperature and wind velocity, and direction shall be taken up to the maximum height of the trajectory for all of the pre-test and test rounds fired at both 4 and 8 Increments of propellants.tt P
16、aragraphs 6.10 and 6.11, Add the following new paragraphs: necessary arrangements to recover all malfunctions which may occur during ballistic test unless otherwise directed by the procuring agency. ballistic teat conditions from the gun alte to down range shall be suitable so that all rounds fired
17、incluing mal- functions will be accessible for recovery.“ ft6.10 Proving ground.-The proving ground shall make the The .terrain in the area specified by the 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-C-14909A (PA) Amendment 2 “6.11 Visual
18、Inspection.-Inspection of the ignition cartridge hOU8lng aid fin assembly after complete loading and aapiembly uhall be finde with the aid of 2-4X magnification. The inspection shali be made Just prior to the assembly of propellant increments. It I The margins of this Amendment are marked with an as
19、terisk to indicate where changes (additions, rnodificatlons , corrections, deletions) from the previous issue were made. This was done as a oonvenience only and the Government assumes no liability whatsoever for any inaccuracies In these notations. Bidders and contractors are cautioned to evaluate t
20、he requirements of this document based on the entire content Irrespective of the marginal notations and relationship to the last previous issue. Custodian : ARMY - PA 1 Preparing Activity: ARMY - PA * Project Numb.er: 1315-AO97 _- I. d I c Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
