Family of airfoil shapes for rotating blades

Details Family of airfoil shapes for rotating blades Family of airfoil shapes for rotating blades

1982-06-25

1983-11-01

Blix, Trygve M.

Aeronautics and astronautics

Aircraft sustentation

Sustaining airfoils

244 35A, 416223R, 416242, B64C 314

Patent

active

044126646

ABSTRACT:
This invention is an airfoil which has particular application to the blade or blades of rotor aircraft such as helicopters and aircraft propellers. The airfoil thickness distribution and camber are shaped to maintain a near zero pitching moment coefficient over a wide range of lift coefficients and provide a zero pitching moment coefficient at section Mach numbers near 0.80 and to increase the drag divergence Mach number resulting in superior aircraft performance.

REFERENCES:
patent: 934771 (1909-09-01), Turnbull
patent: 4325675 (1982-04-01), Gallot et al.

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