Helicopter rotor blades

Details Helicopter rotor blades Helicopter rotor blades

1989-06-27

1990-12-04

Look, Edward K.

Fluid reaction surfaces (i.e., impellers)

Specific blade structure

Tined or irregular periphery

244 1711, 244198, B64C 2746, B64C 2300

Patent

active

049750224

ABSTRACT:
The swept extreme tip edge of a helicopter rotor blade incorporates blade droop to reduce aerodynamic pitching moments caused by spanwise flow encountered in the fore and aft sectors of a rotor rotational disc during forward flight of a helicopter on which the blade is fitted.

REFERENCES:
patent: 3822105 (1974-07-01), Jepson
patent: 4324530 (1982-04-01), Fradenburgh et al.
patent: 4334828 (1982-06-01), Moffitt
patent: 4451206 (1984-05-01), Philippe et al.
patent: 4477042 (1984-10-01), Griswold, II

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