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Rotary Beam Variable Stiffness Wing Spar

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.

Patent Number: 
6,000,660
Date Of Issue: 
12/14/1999
Inventors: 

Kenneth E. Griffin;Robert P. Guillot;Damin J. Siler