ARMY MIL-C-48254 A (1)-1991 CHARGES EXPELLING FOR PROJECTILE 155MM ILLUMINATING M485A2 LOADING ASSEMBLING AND PACKING《M485A2型155MM照明弹用排除弹药装药器的装卸 组装和包装》.pdf

1、c MIL-C-48254A (1) W 9999906 1251997 367 W b NCH-POUNDI MIL-C-48254A (AR) AMENDMENT 1 ? 22 May 1991 MILITARY SPECIFICATION CHARGES, EXPELLING, FOR PROJECTILE, 155MM, ILLUMINATING, M485A2 LOADING, ASSEMBLING AND PACKING This Amendment forms a part of Military Specification MIL-C-48254A (AR), dated 30

2、 July 1984, and is approved for use by the US Army Armament, Munitions and Chemical Command and is available for use by all Departments and Agencies of the Department of Defense. PAGE 8 4.4.2.1 Delete Major Defects 101, 102, 103 and substitute the following: “Major 101 Total length .40% 3.1 Gage 102

3、 Shell wall thickness .40% 3.1 Gage 103 Presence of 4 slots 104 Presence of protrusion 105 Inside diameter .40% 3.1 Gage 106 inverted weight test at inner bottom of cup .40% 3.1 Vi sua1 at bottom of cup .40% 3.1 Visual (Note i) .40% 3.1 4.4.3.3/4.5.3“ Delete Minor Defects 201 through 211, and substi

4、tute the following : I M i nor 201 Evidence of poor Wor kmanshi p .65% 3.5 Visual“ Add note to bottom of page: “1. Test to be performed after expelling charge cover is snap fitted onto expelling charge cup.“ 0 AMSC N/A 1 of 3 FSC 1320 DISTIRBUTION STATEMENT A. Approved for public release; distributi

5、on is unlimited. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-C-48254A (AR) AMENDMENT 1 PAGE 9 4.4.2.2 Delete Major Defect 101 and substitute the following: “Ma j or 101 Thickness of inside rim .40% Gage 102 Thickness at center .40% Gage 103 I

6、nverted weight test (Note 1) .40% 4 .4 .3 .3 /4 .5 .3 Delete Minor Defects 201 through 205 and substitute the f o 1 lowi ng : “Minor 201 Radii or chamfer missing 202 Evidence of poor or incorrect 0.65% 3.1 Visual workmanship 0.65% 3.5 Visual“ Add note to bottom of page: “1. Test to be performed afte

7、r expelling charge cover is snap fitted onto expelling charge cup.“ PAGE 11 4.4.2.4 Delete Minor Defect 202. PAGE 15 Add the following paragraph: “4.4.3.3 Inverted weight test. The expelling charge assembly (less black powder and an ultrasonic seal) shall be subjected to an inverted weight gravity t

8、est in accordance with 4.5.3. Any assembly that fails to comply with the applicable requirements shall be cause for rejection of the lot .II 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-C-48254A (AR) AMENDMENT 1 PAGE i6 Change 4.5.3 to read

9、as follows: “4.6 Dimensional control of molded or plastic parts.“ Add the following paragraph: “4.5.3 Inverted weight test procedure. The expelling- charge cup shall be loaded with a 100 gram weight (sand optional) and a cover pressed and snap fitted completely onto the cup. Then the cup is inverted

10、 so that the cover of the cup is on the bottom (i.e. the stand off projection is on the top) and held for 3 seconds. The cover shall remain completely snap fitted to the cup.“ Custodian: Army-AR preparing activity : Army-AR ( Pr oj ec t 13 2 0-AC 5 9 ) 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-