1、 E, i MIL-1-8 149 6 (AS) AMENDMENT 1 15 October 19 6 8 -1 MILITARY SPECIFIC ATION -* 1- INDICATOR, ATTITUDE, 2-INCH ID -1 6 O 2 /A This amendment forms a part of Military Specification MIL-I-81496(AS) dated 15 April 1968, and has been approved by the Naval Air Systems Command, Depart- ment of the
2、Navy. Page 2, Under Military: II MIL -M - 7 7 9 3 MIL -C -1 4 80 6 MIL4 -2 6482 MIL-G-8 15 5 9 Page 3, under Military: I MIL -ST D-8 3 8 Page 5, Paragraph 3.3: Add Meter, time totalizing Coating , Reflection reducing for instrument cover glasses and lighting wedges Connectors , Electric, Circular, M
3、iniature quick disconnect, enyironme nt testing Gyroscope Assemblies, Attitude and Directional Reference Instructions for Aircraft: Preservation and Packaging , procedures for“ Delete “MIL-STD-794“ and title and add: Lubrication of Military Equipment“ Add “The sphere shall not oscillate or jitter mo
4、re than 5 1/4 degree when subjected to 2G vibration“. E Page 6: Add 3.3.2.4 Time Totalizinq Meter - The indicator shall con- tain a time totalizing meter (4,000 hours) conforming to Specification MIL- M-7793. The reading of the meter shall not require unsealing of the indi- cator case. The time tota
5、lizer shall be installed within the present envelope Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-1-81496 (1) 66 9999906 OLLi3328 MIL-1-8 1 49 6 (AS) AMENDMENT 1 Page 7, paragraph 3.3.9.1: Delete and substitute: II 3.3.9.1 Vibration - The indi
6、cator shall operate satis- factorily without loose parts or internal damage when subjected to the vibration tests of 4.8.21 and 4.8.22.“ Page 8, paragraph 3.4.1.1: Delete sentence and add: “3.4.1.1.1 Standard Conditions - The indicator, when con- nected and operated at standard conditions, shall pro
7、vide a pitch and roll accuracy of O. 25 degree minimum. Longitudinal Acceleration - The indicator , when subjected to an 8G acceleration for 4 seconds along the roll axis, shall provide a pitch and roll accuracy of 2 degrees minimum. Coordinated Turns - The indicator, when sub- jected to coordinated
8、 turns with rates of turn between 90 and 1500 de- grees per minute and bank angles of 20 to 60 degrees, shall provide a pitch and roll accuracy of 3 degrees minimum. jected to uncoordinated turns (skid turns) of less than 5 degrees per min- ute at air speeds not greater than 400 knots for a 10-minut
9、e duration, shall provide a pitch and roll accuracy of 2 degrees minimum. I 3.4.1.1.2 3.4.1.1.3 3.4.1.1.4 Uncoordinated Turns - The indicator, when sub- Page 14 , paragraph 3.5.5.1 and Table: Delete and substitute: faces of the cover glass and lighting wedge shall be covered with a reflec- tion redu
10、ced coating that meets the requirements of MIL-C-14806 in addi- tion to withstanding the environmental requirements specified herein. The humidity requirements shall be goverened by paragraph 4.8.3 1. I “3.5.5.1 Antireflection Coatinq - All reflecting glass sur- Page 14, paragraph 3.5.6.2 line 5: De
11、lete “White, color No. 37875“ and substitute: “Fluorescent Red, Color No. 11105 of FED-STD-595.“ Page catec 15, add: 113. 7 Lubrication - The gyro bearings shall be lubri- with MINIPURE grease or equivalent with particle size not exceed- ing 25 microns for 2% and 5 microns for 98% of volume. The req
12、uirements of MIL-STD-838 shall be met. I Page 26 , paragraph 4.8.6: Add: “The test shall be repeated with power removed. I -2 - Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-I -8 1 4 9 6 (AS) AMENDMENT 1 Page 30, paragraph 4.8.22: Delete and su
13、bstitute: I 4.8.2 2 Vibration Failure - The indicator shall be tested in accordance with Part II Vibration Tests of MIL-T-5422 with power applied except Curve I1 of Fig. 2 shall be extended at 2g to 20 cycles per second and at 350 cycles per second it shall be changed to 5g and extended to 2000 cycl
14、es per second. At the conclusion of the test the equipment shall meet the requirements of the individual tests I Page 30 , paragraph 4.8.24.1: Delete and substitute: I 4.8.2 4.1 Operatinq - Rated power shall be applied to the equipment and precessions in pitch and roll resulting from accelera- tions
15、 shall be limited as stated in 3.4.1.1. I Page 30, Add: I 4.8.2 4.3 Lonqitudinal Accelerations - The equipment shall meet the requirements of 3.4.1.1.2. 4.8.24.4 Coordinated Turns - The equipment shall meet the requirements of 3.4.1.1.3. 4.8.24.5 Uncoordinated Turns - The equipment shall meet the re
16、quirements of 3.4.1.1.4“ Page 30, paragraph 4.8 . 25, third and fourth sentences: Delete and subs titute: “The error in either pitch and roll shall not exceed 3 O. The error induced by roll maneuvers at a rate of 300 +loo per second shall not exceed one degree. Furthermore, rotating the indicator in
17、 either di- rection at the above rates shall not cause damage to the indicator.“ Page 32: Add: 4.8.3 4 Sand and Dust - The indicator shall be sub- jected to sand and dust tests procedure I of Specification MIL-E-5272. At the end of the sand exposure, the indicator shall not be damaged and shall meet
18、 the requirements of the individual tests. I Pages 33 and 34, Paragraphs 5.1, 5.2, 5.3, 5.4, and 5.4.1: -3 - Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-1-81496 (LI 66 H 9999906 0343330 6 Delete and substitute: MIL -I -8 1 4 9 6 (AS) AMENDMENT 1 “5.1 PACKAGING, PACKING, PRESERVATION and MARKING - Shall be in accordance with MIL-G-81559.“ -4 - /- I 71 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
