1、I MIL-C-83409 (1) 84 999990b 0428148 7 I . . . . . _. MIL-C-83409 (USAI?) AMENDMENT- 1 . 5 February 1974 MILITARY SPECIFICATION COATINGS VISOR, POLYCARBONATE, ,- FLYING HETXET This amendment forms a part of Military Speci- fication MIL-C-83409(USAF) dated 9 February 1973. Page 2, paragraph 3.5: Dele
2、te and substitute: “3.5. Performance. The coated visor shall meet the optical requirements of MIL-V-43511, Page 2, paragraph 3.6.1: Delete and substitute: “3.6.1 Abrasion rsistance. After being subjected to the abrasion tests in accordance with Section 4, the increase in shall not exceed 4 percent.“
3、. haze shall not exceed 6“percent and the deckease in transmittance Page 3, paragraph 4.2.2: Delete the last sentence and substitute: ,) “The abrasion test will be performed in accordance with Method 1092 of Fed-STD-406 using CSlOF calibrase wheels for 50 cycles under a 500 gram load.“. Page 3, para
4、graph 4.2.3.1: Delete.and substitute: “4.2.3.1 Adhesion test method. A tape, 3M670 (made by the 3M Company), is firmly applied to the test specimen The tape is removed using a snap motion applied at 90 degrees to the test spec imen . I. -_ Page 3, paragraph 4.2.3.2: Delete: “240 hours (10 cycles)“ and substitute: “120 hours (5 cycles)“. . CUSTODIAN: . 5- PREPARING ACTIVITY: -= . Air Force - 11 Air Force - 11 PROJECT NIMBER: 8415-F908 -*US. GOVERNMENT PRINTING OFF!CE: 1974-713152/3875- FSC 8415 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
