Blade for high-performance shrouded propeller, multi-blade shrou

Details Blade for high-performance shrouded propeller, multi-blade shrou Blade for high-performance shrouded propeller, multi-blade shrou

1989-02-28

1990-05-22

Garrett, Robert E.

Fluid reaction surfaces (i.e., impellers)

Specific blade structure

Cantilever blade

416DIG2, 416DIG5, B63H 126

Patent

active

049273310

ABSTRACT:
This invention relates to a blade for shrouded propeller, wherein: in plan, its aerodynamically active part presents a rectangular shape; and the maximum relative camber of the successive profiles constituting the aerodynamically active part of the blade increases from a value close to 0 to a value close to 0.04; the twist of the aerodynamically active part of the blade decreases from a first value close to 12.degree. to a second value close to 4.degree., then increases to a third value close to 4.5.degree.; and the maximum relative thickness of said successive profiles decreases from a value close to 13.5% to a value close to 9.5%.

REFERENCES:
patent: 3506219 (1970-04-01), Mouille et al.
patent: 3594097 (1971-07-01), Mouille et al.
patent: 4281966 (1981-08-01), Duret et al.
patent: 4392781 (1983-07-01), Mouille et al.
patent: 4459083 (1984-07-01), Bingham
patent: 4569633 (1986-02-01), Flemming Jr.
patent: 4585391 (1986-04-01), Vuillet et al.
patent: 4652213 (1987-03-01), Thibert et al.
patent: 4773825 (1988-09-01), Rodde et al.

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