Hydrofoil craft

Details Hydrofoil craft Hydrofoil craft

1993-02-23

1994-08-23

Swinehart, Edwin L.

Ships

Hull or hull adjunct employing fluid dynamic forces to...

Having hydrofoil

114288, 114291, B63B 124

Patent

active

053397614

ABSTRACT:
A hydrofoil craft according to the invention is provided on the bottom of the hull with at least one, usually several, air cushion recesses arranged along the middle of the bottom in a fore-and-aft direction. The air cushion recesses each forms a groove having the upwardly indented bottom, the upper wall front end, to be deeper and becoming shallower toward the rear end and resembling a triangle or sector in shape when viewed in a longitudinal section and generally to be a rectangle in shape when viewed in a plane. The angle from the shallowest end of the air cushion recess to the deepest end is within 1.degree. to 30.degree. and the two side walls on the sides of the bulwarks of the recess extend a little to the lower parts of the fore-and-aft end walls. The hydrofoils are mounted across the lower parts of the air cushion recesses and are close to the air cushion recesses. The front-wall type upper wall of the front-most air cushion recess is provided at the highest place with at least one blast orifice for ejecting pressure air.

REFERENCES:
patent: 1217828 (1917-02-01), Ruhe
patent: 1412848 (1922-04-01), Dunajeff
patent: 3827388 (1974-08-01), Fulton
patent: 3871317 (1975-03-01), Szpytman
patent: 4665853 (1987-05-01), Gerdsen et al.

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