Apparatus and methods for reducing aircraft lifting surface flut

Details Apparatus and methods for reducing aircraft lifting surface flut Apparatus and methods for reducing aircraft lifting surface flut

1989-11-28

1991-10-08

Peters, Jr., Joseph F.

Aeronautics and astronautics

Aircraft power plants

Mounting

244 75A, B64D 2726, B64C 1702

Patent

active

050547151

ABSTRACT:
A device for preventing aircraft wing flutter causes the port and starboard wings of the aircraft to oscillate at different frequencies. In an exemplary embodiment, engine nacelles are suspended from the port and starboard wings by strut assemblies in a manner that the port and starboard engine nacelles have different oscillation frequencies when subjected to a displacing force. The port and starboard strut assemblies each include a pair of flexible beams whose dimensions and composition may be adjusted to change its stiffness. In this manner, the oscillation frequency of the attached engine nacelle is adjusted in a known manner.

REFERENCES:
patent: 4233883 (1980-11-01), Miko
patent: 4437627 (1984-03-01), Moorehead
patent: 4502652 (1985-03-01), Breitbach
patent: 4616793 (1986-10-01), Hassler, Jr.
Time Life Books, The Epic of Flight, 1983, Poster of Combat Jets of the World.

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