Inclined raked partially submerged propellers

Details Inclined raked partially submerged propellers Inclined raked partially submerged propellers

1973-05-04

1976-02-17

Blix, Trygve M.

Fluid reaction surfaces (i.e., impellers)

Specific blade structure

Irregular, flanged or channel forming blade surface

416202, B63H 128

Patent

active

039384632

ABSTRACT:
A highly efficient system for propelling high speed water borne craft is closed. The use of an inclined shaft which permits an efficient machinery arrangement is facilitated by driving the vessel by a unique propeller which is designed to operate while partially submerged. The propeller is raked to maximize the horizontal thrust component produced as the propeller blades sweep through the water. The partially submerged propeller provides an attractive method for reducing appendage drag which is associated with traditional horizontal or inclined propeller shaft systems. Further, this concept and design represents a propeller system which unique among propeller systems produces near zero transverse forces.

REFERENCES:
patent: 1044176 (1912-11-01), Hickman
patent: 2684654 (1954-07-01), Johnson
patent: 3109495 (1963-11-01), Lang
patent: 3312286 (1967-04-01), Irgens
patent: 3598080 (1971-08-01), Shields

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