High speed outboard drive unit

Details High speed outboard drive unit High speed outboard drive unit

1979-10-09

1981-10-20

Blix, Trygve M.

Marine propulsion

Screw propeller

Propulsion unit casing

440 66, 440900, 440 89, 416 93A, B63H 114, B63H 506, B63H 2132

Patent

active

042958350

ABSTRACT:
An engine driven outboard drive unit for propelling a watercraft has a vertical drive shaft driving a horizontal propeller shaft on which a propeller is mounted. The drive unit has a gearcase torpedo which houses both the propeller shaft and an annular exhaust gas passage. The exhaust passage discharges aft through the plane of the propeller. A small annular projection is formed around the aft end of the torpedo to improve high speed performance.

REFERENCES:
patent: 1649657 (1927-11-01), Blake
patent: 2089366 (1937-10-01), Hansen
patent: 3554665 (1971-01-01), Lorenz
patent: 3727574 (1973-04-01), Bagge
patent: 3939792 (1976-02-01), Wasenius
patent: 3939795 (1976-02-01), Rocka
patent: 4080099 (1978-04-01), Snyder
patent: 4096819 (1978-06-01), Evinrude

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