Contra-rotating propeller drive system

Details Contra-rotating propeller drive system Contra-rotating propeller drive system

1974-03-27

1976-02-17

Blix, Trygve M.

B63H 510

Patent

active

039384640

ABSTRACT:
A contra-rotating propeller system, particularly adapted for high speed water craft, is characterized by a movable support for at least one of two nominally-aligned and independently driven contra-rotating propellers. In a particular embodiment a forward propeller is driven by a forward engine via a forward drive shaft extending aftward and through the keel. The aft propeller is supported behind the forward propeller by a strut which serves as a rudder and as the housing for the aft propeller gear box. The forward and aft engines are preferably in longitudinal alignment to minimize hull width. The aft propeller strut is pivotable under control of the helm to effect steering.

REFERENCES:
patent: 768336 (1904-08-01), Manker
patent: 923123 (1906-05-01), Ishoy
patent: 1843574 (1932-02-01), May
patent: 3469556 (1969-09-01), Campbell et al.
patent: 3848561 (1974-11-01), Price

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