NAVY MIL-I-21685-1958 INDICATOR COMPASS REPEATER ROTATING DIAL TYPE MW-2《MW-2型旋转拨号式罗盘中继器指示器》.pdf
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1、MIL-I-21b5 bb W 777770b 0130530 4 W MIL-1-21685 (AER) IO NOVEMBER 1958 MILITARY 8pEcPICATIO INDICATOR, CWASS REPEAIER, RONW DIAL, TYPE MW-2 This specification has been approved by te Bureau of Aeronautics, Department of the 8avy. 1. SCOPE 1.1 e. - This specification covers certain design requirement
2、s and all performance require- ments for procurement of one type of 26 volt, single phase, 400 cycle, mtating dial compass re- peater indicator designated Type MW-2. 2.1 The following specifications, standards, and publication of the issue in effect on date of invitation for bids, form a part of thi
3、s specification: Federal. QQ-C-320 QQ-30 QQ-PA16 MIL-P-U MIL-C-5015 MIL-D-5028 MIL-E-5272 MIL-C-5541 MIL-1-6181 MIL-6872 MIL-L- MIL-P- MIL-S-n42 MIL -P-V 36 MIL-A-8625 MIL4 -17858 Federal - FED. sm. No. 1 FED. BTD. No. 595 Chromium Plating (Electrodeposited) Nickel Plating (Electrodeposited) Plating
4、, Camium (Electrodeposited) Preservation, Method of Connectors, Electric, “AW me Drawings and Data Lists: Environmental Testing, Aeronautical and Associated Equipment, Chemical Films for Aluminum and Aluminum Alloys Interference Limits and Tests; General Specification for Stabilized, 4“/ER, Type MA-
5、1 Standard for Laboratory Atmospheric Conditions for Testing Calors Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- MIL-I-ELb5 bb W 77777Ob OL3053L b =-I- 21685 /(AER) Military MIL-STD-130 M828094 lis33558 Ms33586 Air Force-avy Aeronautical m5727 Id
6、entification Bierking of U. S. Wiitary Property Indicator, Compass Repeater, Rotating Mal, Type MU-2 %umerals and Letters, Aircraft Instmt Mai, standard Metals, Definition of Dissimilar Form of Glass - Mrcrsft Instrumept Cover Air Force-Navy Aeronautical Uetin No. 143 Specifications and Standards, U
7、se of (When requesting any of the applicable documents refer to both title and number. Copies of this specification and applicable documents may be obtained upon application to the Conmanding Officer, %val Aviation Supply Depot, 700 Robbins Avenue, Piiilsdelphia 1l, Pennsylvania, Attention: Cade CDS
8、) 3.1 w ification. - The indicator furnished under this specification shall be a product which has been tested and has passed the qualification tests specified herein. 3.2 Selection of Government docilmente. - Bpecifications and standards for necessary conmiodities and services not specified herein
9、shall be selected in accordance with ARA EuIletin Ho. 143 except as provided in 3.2.1 and 3.2.2. 3.2.1 Commercial parts. - Comercial parts having suitable properties may be used where, on the date of invitation for bide, there are ao suitable stan- parts. parts, like screws, bolts, nuts, cotter pins
10、, havlng suitable properties may be used provided: In ny case, commercial utility (a) (b) They can be replaced by the standard parts (HS or An) wi+Aout alteration. The corresponding standard part numbers are referenced in the parts list a the dtchee opened, and a fine setting made on the rotor posit
11、ion to obtain the minimum voltage, approximately 10 millivolts. To set electrical zero accurately, a sensitive PSCULUU tube voltmeter must 4.6.6 Magnetic effect. - The indicator shall be revolved about a short bar magnet compss with the nearest part of the indicator 5-112 inches from the bar magnet,
12、 and ki a vertical plane which is a perpendicular bisector of the Rorth-South axis of the bar magnet. the indicator shall be held in positions O, 45, 90, 135, 180, 225, 270, aud 315 degrees from the initial poeition. in its normel operating position. The horizontal magnetic field intensity shall be
13、0.17 to 0.19 oersted. The deflection of the campass at any of the specified positions shall not exceed one degree. ehall be performed first with no voltage applied to the indicator and then shall be repeated with the indicator operating. Starting directly under.the compass, At each of these position
14、s the indicator shall be rotated on its horizontal axis until it is This test 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- - MIL-I-2Lb5 bb m 7799906 0130539 O m MIL-1-21685 (UR) I I . I Figure 3. Synchro Null Test Wiring 10 Provided by IHSNot f
15、or ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-I-ZLb85 bb 777770b 0330540 7 *- - MIL-1-21685 (UR) 4.6.7 Vibration error. - The indicator shall be mounted on the vibration stand in its normal operating position. lar motion in a plane inclined 45 degrees to the horiz
16、ontal plane with a circle diameter of between 0.009 and 0.Oll of an inch. The frequency of applied variation shall be varied slowly from 5 to 50 cycles per second. oscillation or variation in excess of one degree. The indicator shall be operated and shall be subject to vibration with a circu- Ho con
17、dition of applied variation shall cause vibration errors involving pointer 4.6.8 Damping. - Two indicators shall be connected to the standard data transmitter, with their pointers displaced (within the limits of 45 to 90 degrees) in opposite directions fram the locked standard data transmitter setti
18、ng, and instantly energized from the alternating current buss at 26 volts, 403 cycles per second. not exceed 4 seconds. The time 1Wt for pointer oscillation to mp out, if present, shall 4.6.9 Lou temperature operation. (This test may be combined with the Low temperature exposure test at the discreti
19、on of the testing agency). - The indicator shall be properly connected except that no power shall be applied. (-65. F) for a period of 4 hours. dicator connected to the standard data transmitter, power shall be applied to the indicator. end of the 4-hour period and with the temperature maintained at
20、 -54 C (-65“ F) the transmitter shall be rotated slowly through 360 degrees. without sticking or lagging by more than 3 degrees. The Indicator shall then be subjected to an ambient temperature of -54 C miring the last i5 minutes of the 4-hour period, and with the in- At the The indicator pointer sha
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