Propulsion system for marine vessel

Details Propulsion system for marine vessel Propulsion system for marine vessel

1994-10-04

1996-06-25

Swinehart, Edwin L.

Marine propulsion

Screw propeller

Having means to control flow around propeller

440 80, 440900, B63H 510

Patent

active

055295207

ABSTRACT:
A propulsion unit for watercraft that employs a pair of counter-rotating propellers disposed one in front of the other in order to improve the performance upon acceleration, a cavitation effect is generated around at least one of the propellers at least during acceleration. Various ways in which this can be done employing the exhaust gases from the powering internal combustion engine for driving the propellers are illustrated.

REFERENCES:
patent: 3434447 (1969-03-01), Christensen et al.
patent: 4871334 (1989-10-01), McCormick
patent: 4911665 (1990-03-01), Hetzel

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