Gerald C Lakin

US Patent:

50547151, Oct 8, 1991

Filed:

Nov 28, 1989

Appl. No.:

7/442094

Inventors:

Thomas R. Hager - Bothell WA
Gerald C. Lakin - Bellevue WA
John T. Rogers - Snohomish WA

Assignee:

The Boeing Company - DE

International Classification:

B64D 2726
B64C 1702

US Classification:

244 54

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.

US Patent:

49173316, Apr 17, 1990

Filed:

Nov 10, 1988

Appl. No.:

7/269839

Inventors:

Thomas R. Hager - Bothell WA
Gerald C. Lakin - Bellevue WA
John T. Rogers - Snohomish WA

Assignee:

The Boeing Company - Seattle WA

International Classification:

B64D 2700

US Classification:

244 54

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.