Twin-propeller stern drive

Details Twin-propeller stern drive Twin-propeller stern drive

1975-03-24

1976-05-04

Blix, Trygve M.

74665GB, 115 41R, B63H 510

Patent

active

039540839

ABSTRACT:
Twin-propeller stern drive propulsion unit having automatic thrust alignment trim and retractable hydrofoils for improved shallow water operation. Retention of optimum thrust direction is accomplished automatically by parallel geometry action of a cross-plane trim actuator with a vertical drive shaft housing attached to an underwater unit.

REFERENCES:
patent: 2705468 (1955-04-01), Dix
patent: 2980047 (1961-04-01), Korganoff et al.
patent: 3199483 (1965-08-01), Ellzey
patent: 3354857 (1967-11-01), Hobday
patent: 3434449 (1969-03-01), North
patent: 3456611 (1969-07-01), Johnson

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