Propulsion and lift system for speed boats with submerged foil

Details Propulsion and lift system for speed boats with submerged foil Propulsion and lift system for speed boats with submerged foil

1987-11-19

1989-09-05

Peters, Jr., Joseph F.

Ships

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

Having hydrofoil

440 38, B63B 124

Patent

active

048628204

ABSTRACT:
The invention relates to a propulsion and lift system for speed boats with a submerged foil. According to the invention, foil (4) includes main lifting surface (11) and hinged trailing edge aileron (12) as well as components (14, 25; 15, 16) to inject gas at high velocity from the lower surface of the main lifting surface and the upper surface of the trailing edge aileron. This provides lift at low speed, in particular lift augmenting at takeoff and defines a nozzle (13) with a two-phase flow which alone provides propulsion at high speed by expansion of a gas-liquid emulsion in said nozzle. Application is to the design of fast hydrofoils.

REFERENCES:
patent: 3044432 (1962-07-01), Wennagel et al.
patent: 3171379 (1965-03-01), Schell, Jr. et al.
patent: 3977348 (1976-08-01), Bordat et al.
patent: 4335671 (1982-06-01), Warner et al.

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