Foil system for jet propelled aquatic vehicle

Details Foil system for jet propelled aquatic vehicle Foil system for jet propelled aquatic vehicle

1986-07-09

1988-10-04

Peters, Jr., Joseph F.

Marine propulsion

Jet drive

440 47, 60221, B63H 1104

Patent

active

047753412

ABSTRACT:
Water directing apparatus for the jet pump inlet of a watercraft having a planing surface within which the inlet is formed. The apparatus is carried by the planing surface and includes a pair of laterally spaced apart, longitudinally extending side fins projecting downwardly of the planing surface. Curvilinear, transversely disposed upstream and downstream vanes are oriented to direct water into the inlet, the angles of attack of the vanes being established to direct boundary layer water into the inlet without separation. The vane combination achieves water flow directional change with minimum drag and flow separation. An embodiment is disclosed employing a vane movable in response to inlet passage pressure.

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