Watercraft

Marine propulsion – Oscillating propelling means

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Details

400 21, B63H 130

Patent

active

060222492

ABSTRACT:
A novel water craft, which may include a hull with a keel, having propulsion means extending below the water line. The propulsion means comprises a pair of flappers each adapted to oscillate through an arcuate path in a generally transverse direction with respect to the central longitudinal dimension of the watercraft. Means are operatively associated with the propulsion means for applying input force to the propulsion means. The flappers twist to form an angle of attack for providing forward thrust with respect to the longitudinal dimension of the watercraft while moving in both directions along the arcuate path.

REFERENCES:
patent: 2286914 (1942-06-01), Knapp
patent: 2873713 (1959-02-01), Baastrup
patent: 2948255 (1960-08-01), Sbrana
patent: 4936802 (1990-06-01), Ueno
patent: 5460551 (1995-10-01), Beres

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