Foil

Details Foil Foil

1989-08-17

1990-08-21

Peters, Jr., Joseph F.

Aeronautics and astronautics

Aircraft sustentation

Sustaining airfoils

244 45R, 114274, 114140, 114127, B64C 310, B63B 124, B63B 338, B63B 4100

Patent

active

049499190

ABSTRACT:
Hydrofoil families which have high lift and low drag coefficients. Induced vorticity is partly suppressed by introducing a longitudinal component of the flow directed from the foil tip towards the hydrofoil base at least in the area of the hydrofoil tip. Further increase of the hydrofoil efficiency is attained by reducing the low lift and high drag induced vortex enhancing area along the tip. For given lift requirements the foil area can be reduced and cavitation performance improved. High torsional and bending resistance are attained by using high modulus materials arranged in chosen directions.

REFERENCES:
patent: 3547063 (1970-12-01), Follett
patent: 4417708 (1983-11-01), Negri
patent: 4635577 (1987-01-01), Palmquist

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