Fluid reaction surfaces (i.e. – impellers) – Specific blade structure – Radial flow devices
Patent
1984-06-19
1987-05-26
Garrett, Robert E.
Fluid reaction surfaces (i.e., impellers)
Specific blade structure
Radial flow devices
416228, B64C 2746
Patent
active
046681698
ABSTRACT:
An outboard region of a helicopter rotor blade of aerofoil cross section has a thickness to chord ratio not greater than twelve percent and an inboard region has a thickness to chord ratio greater than twelve percent. Preferably, the thickness to chord ratio of the inboard region is greater than eighteen percent and may increase towards the root end to about twenty four percent. The inboard region may extend outwardly to a position not exceeding sixty percent of an operating radius of the rotor blade.
REFERENCES:
patent: 3782856 (1974-01-01), Salkind et al.
patent: 4248572 (1981-02-01), Fradenburgh
U.S. Ser. No. 318,662 filed 6-1943, Bitterli et al.
Garrett Robert E.
Pitko Joseph M.
Westland plc
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