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Geared-elevator flutter studyThe paper describes an experimental and analytical study of the transonic flutter characteristics of an empennage flutter model having an all-movable horizontal tail with a geared elevator. Two configurations were flutter tested: one with a geared elevator and one with a locked elevator with the model cantilever-mounted on a sting in the wind tunnel. The geared-elevator configuration fluttered experimentally at about 20% higher dynamic pressures than the locked-elevator configuration. The experimental flutter boundary was nearly flat at transonic speeds for both configurations. It was found that an analysis which treated the elevator as a discrete surface predicted flutter dynamic pressure levels better than analyses which treated the stabilizer and elevator as a warped surface. Warped-surface methods, however, predicted more closely the experimental flutter frequencies and Mach number trends.
Document ID
Document Type
Conference Proceedings
Ruhlin, C. L.
(Boeing Commercial Airplane Co. Seattle, WA, United States)
Doggett, R. V., Jr.
(NASA Langley Research Center Structures and Dynamics Div., Hampton, Va., United States)
Gregory, R. A.
(Boeing Commercial Airplane Co. Seattle, Wash., United States)
Date Acquired
August 8, 2013
Publication Date
January 1, 1976
Subject Category
Structural Mechanics
Meeting Information
Structures, Structural Dynamics, and Materials Conference(King of Prussia, PA)
Distribution Limits
No Preview Available