1、 MIL-P-51479A (2) 13 7777706 0963779 O W MIL-P-51474A( EA AMENDMENT 2 SU PERS ED ING AMENDMENT 1 28 May 1986 , % - f. 2 October 1986 MILITARY SPECIFICATION PROJECTILE, 64 MM, RIOT CONTROL, KE M743 This amendment forms a part of MIL-P-51474A( EA) , dated 25 April 1984, and is approved for use within
2、the Chemical Research, Development and Engineering Center, Department of the Arny and is available for use by all Departments and Agencies of the Department of Defense. PAGE 3 Delete paragraph 3.3.1 in its entirety and substitute the following: “3.3.1 Wra assembl . The wrap assembly shall have a max
3、imum tensile strength of BE,-y. 1.0 pounds when tested in accordance with 4.4.4.1. PAGE 7 Delete paragraph 4.4.4.1 in its entirety and substitute the following: “4.4.4.1 Wrap assembly. (a) Fixture. Use a test fixture consisting of two 1/4-inch- diameter pins which are parallel to each other and are
4、oriented normal to the pull axis of the tensile tester. ports and have a free span pin length of 0.75 2 0.01 inch. The pins must be free to rotate in their sup- (b) Procedure. (1) (2) (3) Precondition the assembled projectile for 24 hours at Cool the projectile to room temperature in a low humid- Cu
5、t a 0.50 2 0.01 inch wide test band from the break- 130“ - + 5F. ity environment such as a desiccator. band over the cavity area. the projectile. Test the breakband within 5 minutes of removal from FSC 1310 DISTRIBUTION STATEMENT A. Approved for public release; distribution is unlimited. 1 of 2 Prov
6、ided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- MIL-P-5L474A (2) 13 = 7Ob 04b4000 L r MIL-P-5 14 74A( EA) AMENDMENT 2 (4) (5) (6) (7) (8) Mount the test band in the test fixture. Set the pins 3-25 to 3.50 inches apart at the start of Use a crosshead rat
7、e for the test band of 10 inches per Set the recorder at 200 pounds full scale and use a Record the ultimate load (maximum tensile strength) to the test. minute. recorder time constant of no greater than 1 second full scale. the nearest 0.5 pound.“ PAGE 8 4.4.4.2(c),. conducted under nil wind condit
8、ions in an indoor range constructed to contain the projectile. Delete last sentence and substitute “These test firings shall be All access to the range shall be controlled during firing.“ PAGE 9 Delete paragraph 6.3(b) in its entirety. Custodian : Am - EA Preparing activity: Am - EA Project No. 131O-Ak22 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
