Counter-rotating marine propulsion system

Details Counter-rotating marine propulsion system Counter-rotating marine propulsion system

1974-12-23

1976-05-04

Blix, Trygve M.

Fluid reaction surfaces (i.e., impellers)

Specific blade structure

Irregular, flanged or channel forming blade surface

416 87, B63H 104

Patent

active

039540847

ABSTRACT:
A counter-rotating marine propulsion system employing a unique cam assembly which facilitates the alternate extension and retraction of a plurality of drive blades from a pair of counter-rotating spinwheels. The purpose of the retraction of the blades is to eliminate water drag which would otherwise be experienced by the blades as they traverse the inner area of the shroud of the spinwheel.

REFERENCES:
patent: 392346 (1888-11-01), Kirsch
patent: 515883 (1894-03-01), Pelletier
patent: 881537 (1908-03-01), Betaany

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