1、_ SAE Technical Standards Board Rules provide that: “This report is published by SAE to advance the state of technical and engineering sciences. The use of this report is entirely voluntary, and its applicability and suitability for any particular use, including any patent infringement arising there
2、from, is the sole responsibility of the user.” SAE reviews each technical report at least every five years at which time it may be reaffirmed, revised, or cancelled. SAE invites your written comments and suggestions. Copyright 2011 SAE International All rights reserved. No part of this publication m
3、ay be reproduced, stored in a retrieval system or transmitted, in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, without the prior written permission of SAE. TO PLACE A DOCUMENT ORDER: Tel: 877-606-7323 (inside USA and Canada) Tel: +1 724-776-4970 (outside U
4、SA) Fax: 724-776-0790 Email: CustomerServicesae.org SAE WEB ADDRESS: http:/www.sae.org SAE values your input. To provide feedback on this Technical Report, please visit http:/www.sae.org/technical/standards/AS20708/74AAEROSPACESTANDARDAS20708/74 REV. A Issued 1997-07 Revised 2011-07Superseding AS207
5、08/74 Synchro, Torque Receiver Transmitter, Type 37TRX6A FSC 5990 RATIONALE This Revision consists of a 5 (five) year review, which provides updates to current format and references. NOTICE This specification is approved for use by all Departments and Agencies of the Department of Defense. The requi
6、rements for acquiring the Synchros described herein shall consist of this specification and the latest issue of SAE AS20708. Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-SAE AS20708/74A Page 2 of
7、3TABLE 1 REQUIREMENTS Requirement Value Unit Tolerance Frequency Primary Voltage Primary Current Primary Power Impedance: Zss Impedance Angle: Zss Transformation Ratio Phase Shift (Lead) Electrical Error Receiver Error Null Voltage: Total Fundamental Synchronizing Time 30 2 Synchronizing Time: 177 2
8、 Torque Gradient Radial Play End Play 60 115 830.0 9.25 7.0-10.0 30.0- 40.0 0.783 3.510.0 36.0 170.0 35.0 1.02.00.90 0.0008 0.0030 Hz volts milliampswattsohmsdegrees - degrees minutesminutesmillivoltsmillivoltsseconds seconds ounce-inches per degree inchesinches1% 1% maximum maximum min.-max. min.-m
9、ax. 2% maximum maximum maximum maximum maximum maximum maximum minimum maximum 0.0020 Temperature Rise 35.0 degrees (C) maximum Variation of Voltage (+10%) and Freq. (-5%) 18.0 watts maximum This unit shall not be subjected to the altitude requirements of SAE-AS20708. TABLE 2 MILITARY PART NUMBER VA
10、RIANT CHARACTERISTICS Military Part No. 1/A .010 B .010 GMaximum ShaftStyle Terminal EndU+ .0000 - .0002 M20708/74-01A .700 .730 4.030 Splined Terminal Board .2405 1/ Military part number M20708/74-01A shall be the NATO standard. 1/ The suffix letter following the numerical dash number corresponds t
11、o the latest modification letter in the type designation. Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-SAE AS20708/74A Page 3 of 3TABLE 3 MILITARY PART NUMBER CROSS-REFERENCES Superseded Military
12、Part Numbers New Military Part Numbers SAE AS20708/74A MIL-S-20708-74C MIL-S-20708/74B M20708/74C-001 M20708/74-001 M20708/74-01A NOTE: All line items shown in Table 3 refer to equivalent and interchangeable synchros of the same type designation modification. Part number changes do not affect form, fit, or function of the synchros listed therein. PREPARED BY SAE COMMITTEE AE-7A - GENERATORS/CONTROLS/MAGNETIC DEVICES Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
