Symmetrical propeller

Details Symmetrical propeller Symmetrical propeller

1979-12-26

1982-05-25

Cherry, Johnny D.

Marine propulsion

Screw propeller

416 93A, 416223R, 440 89, B63H 126

Patent

active

043314295

ABSTRACT:
A propeller (18) having an exhaust discharge passage (22) through the propeller hub has blades (24) symmetrical in thickness about the nose-tail pitch line and symmetrical in plan form about a rake line (26). The propeller (18) is particularly effective to increase reverse thrust when used with an outboard drive unit (10) having exhaust gas relief passages (27).

REFERENCES:
patent: 424056 (1890-03-01), Gibert
patent: 2116055 (1938-05-01), Weichwald
patent: 2609055 (1952-09-01), Monroe
patent: 3434447 (1969-03-01), Christensen et al.
patent: 4023353 (1977-05-01), Hall

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