NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Collections About News Help Login
Back to Results
The Intelsat 4 antenna positionerThe Intelsat 4 communications satellite has two spot beam antennas which are pointed to selected land masses by gimbaled positioners. The positioners employ drive motors with electromagnetic brakes and jackscrews that are self-caging during the launch. The positioner uses dry lubricants for ball bearings, spur gears, screw and nut, and various journal bearings. A coefficient of friction of approximately 0.05 was demonstrated in vacuum operation. Success of the positioner was demonstrated on the first Intelsat 4 placed in orbit in January 1971. The developmental problems that were encountered and their solutions are discussed.
Document ID
19720018743
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Glassow, F. A. (Hughes Aircraft Co. El Segundo, CA, United States)
Date Acquired
August 6, 2013
Publication Date
June 1, 1972
Publication Information
Publication: NASA. Ames Res. Center 6th Aerospace Mech. Symp.
Subject Category
Communications
Accession Number
72N26393
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
Document Inquiry

Available Downloads

There are no available downloads for this record.

Related Records

IDRelationTitle19720018727Collected Works6th Aerospace Mechanisms SymposiumN72-26377 17-15Collected Works
No Preview Available