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/AS20708/67AAEROSPACESTANDARDAS20708/67 REV. A Issued 1999-07 Revised 2011-07Superseding AS207
5、08/67 Synchro, Torque Differential Receiver, Type 31TDR6B 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 requ
6、irements 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 AS20708/67A Page 2 of
7、 3TABLE 1 REQUIREMENTS Requirement Value Unit Tolerance Frequency Primary Voltage Primary Current Primary Power Impedance: Zp Zd Impedance Angle: Zp Zd Transformation Ratio Phase Shift (Lead) Electrical Error Receiver Error Synchronizing Time 30 2 Synchronizing Time: 177 2 Torque Gradient Radial Pla
8、y End Play 60 78 748.0 7.8- - - - 1.154 6.510.0 48.0 1.02.00.30 0.0008 0.0030 Hz volts milliampswattsohmsohmsdegrees degrees - degrees minutesminutesseconds seconds ounce-inches per degree inchesinches1% 1% maximum maximum min.-max. min.-max. min.-max. min.-max. 2% maximum maximum maximum maximum ma
9、ximum minimum maximum 0.0020 Temperature Rise 18.0 degrees (C) maximum Variation of Voltage (+10%) and Freq. (-5%) - watts maximum TABLE 2 MILITARY PART NUMBER VARIANT CHARACTERISTICS Military Part No. 1/ A .010 B .010 GMaximum ShaftStyle Terminal EndU+ .0000 - .0002 M20708/67-01B .700 .730 3.635 Sp
10、lined Terminal Board .2405 1/ Military Part number M20708/67-01B shall be the NATO standard. 1/ The suffix letter following the numerical dash number corresponds to the latest modification letter in the type designation. Copyright SAE International Provided by IHS under license with SAENot for Resal
11、eNo reproduction or networking permitted without license from IHS-,-,-SAE AS20708/67A Page 3 of 3TABLE 3 MILITARY PART NUMBER CROSS-REFERENCES SUPERSEDED MILITARY PART NUMBERS NEW MILITARY PART NUMBERS SAE-AS20708/67AMIL-S-20708-67A MIL-S-20708/67 M20708/67A-001 M20708/67-001 M20708/67-01B NOTE: All
12、 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-,-,-
