Rotary beam variable stiffness wing spar

Details Rotary beam variable stiffness wing spar Rotary beam variable stiffness wing spar

1998-01-19

1999-12-14

Poon, Peter M.

Aeronautics and astronautics

Aircraft structure

Airfoil construction

244117R, B64C 100

Patent

active

060006609

ABSTRACT:
A segmented rotatable beam provides a spar or rib in an aircraft wing. The rotatable beam has a variable stiffness dependent upon the radial orientation of the rotatable beam about a longitudinal axis of the beam. The segmented rotatable beam comprises a plurality of tubular segments that are pivotly interconnected by connecting beam links that are rotatably mounted in bearings disposed along the longitudinal axis of the beam.

REFERENCES:
patent: 3666210 (1972-05-01), Look et al.
patent: 3883093 (1975-05-01), Violleau
patent: 4330100 (1982-05-01), Elber
patent: 4725020 (1988-02-01), Whitener
patent: 4863117 (1989-09-01), Riout
patent: 5082207 (1992-01-01), Tulinius
patent: 5150864 (1992-09-01), Roglin et al.

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