1、MIL-I-21203A( As) Amendment -2 . 15 November i969 Amendment -1 15 October i963 MILITARY SPECIFICATION INDICATOR, ATTITUDE, SPHERICAL, DIRECT READING, FAST ERECTING, ELECTRIC GYRO This Amendment forms part of Military Specification MIL-I-21203A(WEP) of 1 August i962 and has been approved by the Naval
2、 Air Systems Command, Department of the Navy: By this Amendment MIL-I-21203A(WEP) is changed to MIL-I-21203A(AS) and throughout the specification Bureau of Naval Weapons shall be changed to Naval Air Systems Command. *Page 2, Paragraph 2.1, under Specifications Military: Add “MIL-C-14 8 O 6 MIL-G-81
3、559 MIL-B-81744 Reflect ive Coating Packaging, Packing, beservat ion and Marking Barrier Coating Solution and Solvent“ *Page 2, Paragraph 2.1, under Standards-Military: Add “MIL-STD-133 4 Barrier Coating Process for Anti-Friction Bearings“ *Page 5, Paragraph 3.4.4.3: Delete and Substitute “3.4.4.3 D
4、emand Erection Device - A pushbutton shall be provided on the face of the indicator to actuate a fast erection system when the instrument is operating. The push button shall be required to be held down in the fast erect position to bring the gyro to its gravity position from any random position in p
5、itch and roll. shall be marked “push for fast erection.“ above pitch trim knob. clockwise position, the gyroscope shall remain caged and the knob shall remdnlocked in the extended position. is applied, the power flag shall fail to appear. The push button 3.4.4.3.1 Caging - (As an alternate to paragr
6、aph 3.4.4.3, With the knob fully extended and rotated to the extreme Means shall be incorporated to cage the gyroscope by pulling the When the knob is pulled and power .FSC 6610 . c Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-I-21203A(As) i5
7、November 1969 Ame,ndment -2 Page 5, Paragraph 3.5.3, first sentence: Delete and Substitute “The electrical connectors shall be of the type used for a hermetically sealed case and shall mate with connector types M-3102-20-29P and MS-3102-18-IP conforming to specification MIL-C-5015 .I1 k ) *Page 7, a
8、fter Paragraph 3.6.1: Add 13.6.1.i Reflective Coating - All reflecting glass surfaces of the cover glass and lighting wedge shall be covered with a reflection reduced coating that meets the requirements of MIL-C-14806. *Page 8, Paragraph 3.7: Delete and Substitute “3.7 Performance - Unless otherwise
9、 specified, values set forth to establish the requirements for satisfactory performance apply to performance under both standard and extreme service conditions. When reduced performance under the extreme conditions is acceptable, tolerances or values setting forth acceptable variations from the perf
10、ormance under the standard conditions will be specified. 3.7.1 Operation - The indicator shall provide accurate visual presentation of aircraft displacement in the roll and pitch axes I which are referenced to gravity, without requiring inputs from any external source other than power supply. 3.7.1.
11、1 Accuracy - 3.7.1.1.1 Standard Conditions - The indicator, when connected and operated at standard conditions, shall provide a pitch and roll accuracy of 0.50 degree minimum. 3.7.1.1.2 Longitudinal Acceleration - The indicator, when subjected to an 8g acceleration for 4 seconds along the roll axis,
12、 shall provide a pitch and roll. accuracy of 2 degrees min, Preservation and Marking - Shall be in accordance with ML-G81559,“ An asterisk preceding a page number denotes a change to be made to the specification which did not appear in Amendment-l. Project Mer 661WC47 . Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
