NAVY MIL-L-22624 A (2)-1966 LINK AMMUNITION 20MM MARK 6 MODS 4 5 AND 6《 MARK 6 MODS 4 5 及 6型20MM弹炼》.pdf

1、-= - MIL-Z-2 26242(m P) WNDmNT 2 4 April 1966 Superseding Amendment - 1 3 January 1966 MILITARY SPECIFICATIO+ LINK, AMMUNITION, ZOMM, MARK 6 MODS 4, 5 AND 6 This amendment forms a part of Military Specification MIL-L-22624A(WEP) dated 13 June 1964 and has been approved by the Bureau of Naval Weapons

2、, Department of the Navy. Page 2, revise paragraph 3.1to read as follows: 3,l Preproduction sample. Unless otherwise specified in the contract or order, a preproduction sample of links shall be delivered for testing at a facility designated in the contract or order (see 6.2). The links shall be deli

3、vered as follows: (a) 7,486 links shall be Mod 4 links. (b) 56 links shall be Mod 5 links. (c) 56 links shall be Mod 6 links. Fifty-two of the Mod 4 links shall be delivered unbelted. links shall also be belted into one length of 60 links, seven lengths of 50 links, one length of 13 links, and one l

4、ength of 11 links. The remainder of the Mod 4 links (7,000) shall be supplied in belts of 50 links. methods proposed for production. to approval of the preproduction sample shall be at the suppliers risk. The Mod 4 The preproduction sample shall be manufactured using the Any production by the suppli

5、er prior Page 5, add the followinq: 3.5.4 Endurance. When tested as specified in 4.6.3.6, the ammunition links shall be capable of functioning in the Mk 4 pod without a stoppage for 7,000 rounds and shall meet the requirements of 3.5.1, 3.5.2, and 3.5.3. Provided by IHSNot for ResaleNo reproduction

6、or networking permitted without license from IHS-,-,-MIL- E 2 2 6 24A (WE P ) AMENDMENT 2 Page 5, revise paragraph 3.6.1 to read as follows: 3.6.1 Resistance to salt spray. Each link tested in accordance with 4.6.1.2 shall be examined visually for evidence of rust. Rust staining and rust drainage sh

7、all not be considered when measuring the area of rust spots. show not more than six rust spots, each measuring not more than 1/8 inch in diameter or equivalent area. not more than three rust spots of the specified diameter. Each lug, rivet and spring shall show not more than one rust spot of the spe

8、cified diameter. not be considered in the determination of failure to pass the salt spray test. Each carrier assembly shall Each loop shall show Any edge rust on the link components shall Page 7, revise paragraph 4.6.1.2 to read as follows: 4.6.1.2 Salt spray resistance test. link have received the

9、phosphate coating of specification MIL-P-16232, Type M, Class 1, ten samples of the assembled unbelted Mod 4 link with supplemental coating (VV-L-800 oil) will be subjected to the test of Federal Test Method Standard No. 151, Method 811.1 for twenty-four hours. Test links shall not be reused for oth

10、er tests nor shall they be delivered to the Government as units of production. tion by mechanical tumbling is permitted prior to phosphate coating and immersion times in phosphate solutions will be adequate to pro- vide proper coating weight and thickness (MIL-P-16232), provided the aforementioned m

11、eets the requirements of 3.6.1. After components of the Mk 6 The link shall meet the requirements of 3.6.1. Part prepara- Page 8, revise paragraph 4.6.1.8 to read as follows: 4.6.1.8 Pitch distance test. Eleven Mod 4 links shall be linked and loaded with dummy rounds (see 3.7) and suspended vertical

12、ly by the rivet of the first link from an appropriate holding device. The distance between the rivet of the first link and the rivet of the last link shall be measured and divided by ten. meet the requirements of 3.4.6. The link shall Page 9, add the following: 4.6.1.14 Gunfire performance tests. A

13、successful gunfire per- formance test is required for each increment of 250,000 Mk 6 Mod 4 links (approximately 10 lots). The tests shall be conducted in accordance with 4.6.3.3 wherein a sample of 256 Mod 4 links shall Provided by IHSNot for ResaleNo reproduction or networking permitted without lic

14、ense from IHS-,-,-MIL-L- 22624A(WEP) LQENDMENT 2 be tested. 250,000 links produced. each performance test shall extend to the lot from which the next performance test link sample is selected. conducted prior to the completion of fabrication of the 250,000 link increment. 3.5.1, 3.5.2 or 3.5.3 shall

15、be cause for rejection of the 250,000 link increment. submitted for test under this paragraph, 4.6.1.14, after corrective action has been taken. The link shall not be judged defective if , it is verified to the satisfaction of the Government representative that a stoppage or other malfunction was ca

16、used by a component other than the links under test, or that the stoppage occurred in the last five rounds of the belt. The preproduction tests shall suffice for the first Thereafter, production lots accepted by These tests may be Failure of any link to meet the requirements of The rejected 250,000

17、link increment may be re- Page 11, add the following: 4.6.3.6 Endurance test. Pod shall be completely filled with Mk 6 Mod 4 ammunition links containing Mk 105 target practice rounds. The rounds shall be fired in bursts of approximately 125 rounds. After the first, second, fourth and fifth bursts th

18、e gun shall be allowed to cool for 3 minutes 2 15 seconds. After the third and sixth bursts, the gun pod shall be cooled until the entire mass of the gun pod has been stabilized at the ambient temperature of the test facility. The ammunition magazine shall be refilled and the test repeated. Gun pod

19、maintenance shall be performed as specified in Publication OP 2719. endurance firing to simplify stoppage analysis. meet the requirements of 3.5.4. defective if it is verified to the satisfaction of the Government representative that a stoppage or other malfunction was caused by a component other th

20、an the links under test, or that the stoppage occurred in the last five rounds of a belt. The ammunition magazine of the Mk 4 Gun The automatic charge feature may be disconnected during The links shall The link shall not be judged 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-