Helicopter rotor blade with improved performance characteristics

Details Helicopter rotor blade with improved performance characteristics Helicopter rotor blade with improved performance characteristics

1992-06-09

1993-09-21

Look, Edward K.

Fluid reaction surfaces (i.e., impellers)

Specific blade structure

Tined or irregular periphery

416237, B64C 2746

Patent

active

052463443

ABSTRACT:
In a helicopter rotor blade having a root end for attachment to a rotor head, a central portion of constant chord dimension and a tip portion having a chord dimension greater than that of the central portion, an outboard region of the central portion has a negative basic pitching moment coefficient, an inboard region of the central portion has a basic pitching moment coefficient more positive than that of the outboard region and the tip portion has a positive basic pitching moment coefficient.

REFERENCES:
patent: 3822105 (1974-07-01), Jepson
patent: 4077741 (1978-03-01), Lowson et al.
patent: 4248572 (1981-02-01), Fradenburgh
patent: 4314795 (1982-02-01), Dadone
patent: 4427344 (1984-01-01), Perry
patent: 4569633 (1986-02-01), Flemming, Jr.
patent: 4668169 (1987-05-01), Perry
patent: 4880355 (1989-11-01), Vuillet et al.

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