Helicopter blade aerofoil

Details Helicopter blade aerofoil Helicopter blade aerofoil

1998-10-22

2000-12-26

Look, Edward K.

Fluid reaction surfaces (i.e., impellers)

Specific blade structure

Radial flow devices

416DIG2, B63H 126

Patent

active

06164918&

ABSTRACT:
Upper and lower surfaces of an aerofoil are defined by the following coordinates given in the table below, and the configuration of a leading edge of the aerofoil is defined by the following leading edge radius and the center of circle. Thus drag divergence Mach number Mdd and maximum lift coefficient Clmax can be increased and the noise level can be reduced.

REFERENCES:
patent: 3728045 (1973-04-01), Balch
patent: 4314795 (1982-02-01), Dadone
patent: 4325675 (1982-04-01), Gallot et al.
patent: 4744728 (1988-05-01), Lednicer et al.
patent: 5344102 (1994-09-01), Nakadate et al.
patent: 5911559 (1999-06-01), Menthe
patent: 5961290 (1999-10-01), Aoki et al.
U.S. Patent Application Serial No. 08/945,300, filed Oct. 17, 1997.
Abstract of JP 10226397 (corresponding to Japanese Application JP 970030730 filed Feb. 14, 1997).

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