Rotary-wing blade of rotary-wing aircraft

Details Rotary-wing blade of rotary-wing aircraft Rotary-wing blade of rotary-wing aircraft

1992-05-29

1994-09-06

Focarino, Margaret A.

Aeronautics and astronautics

Aircraft sustentation

Sustaining airfoils

244 34R, 416223R, B64C 300

Patent

active

053441028

ABSTRACT:
A rotary-wing blade of a rotary-wing aircraft has an airfoil section which has an asymmetrical region of positive camber from its leading edge to its approximately 30-percent chord length point and an essentially symmetrical airfoil region from its 30-percent chord point to approximately its 90-percent chord length point. The region aft of the 90-percent chord point can be optionally curved or reflexed upward or downward to a limited degree. This blade has a large lift coefficient and a small pitching moment and is readily adaptable to meet various design conditions of lift coefficient and pitching moment.

REFERENCES:
patent: 4416434 (1983-11-01), Thibert et al.
patent: 4652213 (1987-03-01), Thibert et al.
patent: 4776531 (1988-10-01), Noonan
Barnes W. McCormick "Aerodynamics Aeronautics and Flight Mechanics" .COPYRGT.1979 pp. 63-93.

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