The development of an airborne 4 point contact moment load bearing, employing hollow ring sections is described. The E-3A (AWACS) Antenna Pedestal Turntable transfers the aerodynamic loads from, and provides rotation to the 30 ft. diameter rotodome, mounted on the Boeing E-3A (modified 707) airplane. As an aircraft structure, Boeing engineering support included material selection and stress, fatigue, failsafe and finite element analyses. Keystone Engineering followed a test and extrapolation approach. Turntable moment loads cause ring prying. The resulting ring distortions affect the bearing race geometry, and ball load distribution, hence bearing life. Rotation subjects the rings to fatigue. Concentrated load points affect the limit load race geometry. Bearing performance and stiffness are traded off against weight.
E-3A antenna, pedestal turntable
Drehbares Traglager fuer die Radarantenne E-3A (AWACS)
MECHANICAL ENGNG. IN RADAR, IEEE, SYMP. ; 136-144
1977
9 Seiten, 19 Bilder
Aufsatz (Konferenz)
Englisch
Turntable turnover device and turntable turnover system
Europäisches Patentamt | 2023
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