1、MIL-C-60458 (AR) Amendment 1 15 September 1981 MILITARY SPECIFICATION CARTRIDGE, 105MM, HE, ROCKET ASSISTED, XM548, DELAY ASSEMBLY FOR This amendment forms a part of Military Sepcification MIL-C-60458 (MU), dated 27 October 1967, and is approved for use by the US Army Armament Research and Developme
2、nt Command, Department of the Army and is available for use by all Departments and Agencies of the Department of Defense. PAGE 1 Add the following preamble underneath the title: “This specification is approved by the U.S. Army Armament Research and Development Command, and is available for use by al
3、l Departments and Agencies of the Department of De fe n se . II Delete “XM548“ and substitute “XM548El“ wherever referenced in specification. 2.1: Specifications Military: Delete “MIL-C-13739 - Composition Delay.“ Standards: Add “MIL-STD-1234“ as follows: “MIL-STD-1234 - Pyrotechnics: Sampling, Insp
4、ection and Testing.“ PAGE 2 Line 1: Delete “Moisture Content“ in both places and substitute “total volatiles.“ Line 3: Delete “0.05 percent“ and substitute “0.1 percent. Page 1 of 5 FSC: 1315 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- - - MIL-C
5、-60458 (1) 13 W 7799706 0338645 9 MIL-(2-60458 (AR) Amendment 1 PAGE 3 3.4.2.2: Delete last sentence and substitute the following: lThe average delay time shall be 19.5 seconds plus or minus 1.5 seconds and the standard deviation shall be no greater than 1.25 seconds.“ PAGE 7 4.3.2.1: Major Category
6、: Major Defect 103: Delete in its entirety and substitute “103. Diameter of two holes at threaded end.Gage the following : 01003 . “ Major Defect 106: Delete in its entirety and substitute as follows: “106. Depth of two holes at threaded end. Gage 01006. Minor Category: Minor Defect 206: Delete in i
7、ts entirety and substitute the following: “206. True position of two holes at threaded end.Gage 01014 . I Minor Defect 218: Delete in its entirety. Minor Defect 221: Delete in its entirety and substitute “221. Surface finish of 2 holes at threaded end improper the following: . Gage 01029.“ Ada Minor
8、 Defects 223 and 224 as follows: “223. Diameter of two pilot holes at end containing counterbore.Gage 01031.“ “224. True position of two pilot holes at end containing counterbore . . .Gage 01032 . It Page 2 of 5 c) . : Provided by IHSNot for ResaleNo reproduction or networking permitted without lice
9、nse from IHS-,-,- MIL-C-60458 (1) 13 7779906 O338646 O = MIL-C-60458 (AR) Amendment 1 PAGE 8 4.3.2.3: Change Minor Defect 201 as follows: “201. Flash composition not removed from sidewall . Visual 03001.“ PAGE 9 4.3.2.5: Delete Major Defect 102 in its entirety and substitute the following: “Major 10
10、0% Inspection 102. Pyrotechnic Composition in evidence on surface tttl . . .Visual 05004 . II Ad new paragraph 4.3.2.6 as follows: “4.3.2.6 Sealed Barrier Bag (See Improvised Packing No. 57/69) Categories Defects Method of Inspection Code No. Critical: None defined Major AQL 0.40 percent 101. Seal i
11、mproper or incomplete. Visual 102. Bag, punctured, torn or cut. Visual 10001 10002 Minor: None defined . I PAGE 10 4.3.3.4.2.1: Line 1: Delete “Seven loaded delays“ and substitute “Twenty loaded delays. Add the following sentence: “A minimum of fifteen (15) delay assemblies at this temperature shall
12、 be recorded on radar to be used in calculating the average and standard deviation of the lot.“ Page 3 of 5 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-C- 604 58 (AR) Amendment 1 Line 1: Delete “Seven loaded delays“ and substitute “Twenty loa
13、ded delays. II AdLi the following sentence: “A minimum of fifteen (15) delay assemblies at this temperature shall be recorded on radar to be used in cal- culating the average and standard deviation of the lot. PAGE 11 Add new paragraph 4.3.3.6 as follows: “4.3.3.6 Determination of average particle s
14、ize. 4.3.3.6.1 Molybdenum Trioxide-Major defect - Code No. 09002. - A sample shall be selected from each lot of molybdenum trioxide and tested in accordance with MIL-STB- 1234. If the sample fails to meet the requirements of drawing 9212470 for particle size the lots shall be rejected. The tests sha
15、ll be conducted in accordance with 4.4.4.1. 4.3.3.6.2 Chromium Oxide - Major defect - Code No. 09003 -A sample shall be selected from each lot of chromium oxide and tested in accordance with MIL-STD-1234. If the sample fails to meet the requirements of drawing 9212469 for particle size the lot shall
16、 be rejected. The test shall be conductea in accordance with 4.4.4.2.“ PAGE 12 4.4.1.2.2, line 2: Delete “4.4.2.1“ and substitute l4. 4.1.2.1 . I 4.4.2: Delete first sentence and substitute the following: “After conditioning at 140F for 12 hours minimum, the delay assembly shall be assembled to the
17、required test equipment specified on the applicable equipment list .It 4.4.3: Delete in its entirety and substitute the following: “4.4.3 Determination of Moisture. The moisture content of the flash, delay, and igniter composition shall be determineu in accordance with Method 102.1 of MIL-STD-1234.“
18、 Page 4 of 5 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-C-60458 (AR) Amendment 1 Add new paragraph 4.4.4 as follows: “4.4.4 Particle size 4.4.4.1 Particle size (molybdenum trioxide). This test shall be conducted in accordance with MIL-STD-12
19、34, method 202.1. 4.4.4.2 Particle size (Chromium oxide) This test shall be conducted in accordance with MIL-STD-1234, method 202.1. Ada new paragraph 6.7 as follows: “6.7 Hanuling of Delay Assemblies. Precaution should be taken during loading, subsequent to loading and prior to packing to insure de
20、lay assemblies are not exposed to conditions which would adversely affect their moisture con tent . It Cus toian: Army -AR Preparing Activity: Army-AR Project No. 1315-A440 Page 5 of 5 * O.S. GOVERNMENT PRINTING OFFICE: 1Si-705-023/677S 2-1 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
