Aerodynamically-stable airfoil spar

Details Aerodynamically-stable airfoil spar Aerodynamically-stable airfoil spar

1991-10-22

1993-12-14

Look, Edward K.

Fluid reaction surfaces (i.e., impellers)

Specific blade structure

Formed with main spar

416230, 416241R, 2988971, 244124, B64C 1126

Patent

active

052696570

ABSTRACT:
A structural spar is provided that provides beneficial flexural-torsional coupling to an airfoil so that flexural excursions of the airfoil induces torsion in the spar so as to change the pitch angle of the airfoil in such a manner as to the oppose the flexure, thereby ameliorating the excursion.

REFERENCES:
patent: 2514888 (1950-07-01), McFarland
patent: 3028292 (1962-04-01), Hinds
patent: 3713753 (1973-01-01), Brunsch
patent: 3768760 (1973-10-01), Jensen
patent: 3962506 (1976-06-01), Dunahoo
patent: 4031289 (1977-09-01), Adamson
patent: 4037988 (1977-07-01), Laird
patent: 4098559 (1978-07-01), Price
patent: 4232844 (1980-11-01), Sobey
patent: 4389162 (1983-06-01), Doellinger et al.
patent: 4627791 (1986-12-01), Marshall
patent: 4741943 (1988-05-01), Hunt

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