Supplemental sailboat propulsion device

Details Supplemental sailboat propulsion device Supplemental sailboat propulsion device

1988-09-29

1990-01-09

Basinger, Sherman D.

Marine propulsion

Oscillating propelling means

Having nonpropelling cycle segment

114132, 440 21, B63H 1608

Patent

active

048924938

ABSTRACT:
A supplemental propulsion device for a sailboat or sailboard type water craft including a pivotal centerboard. A pair of propulsion wings that are vertically hinged to one-another and mounted to the lower portion of the leading edge of the centerboard of the craft. Upon the application to the centerboard of a reciprocating pumping action each propulsion wing moves inwardly to a retracted position adjacent the centerboard during forward movement of the lower portion of the centerboard and moves outwardly to an extended position removed from the centerboard during rearward movement of the lower portion of the centerboard. Cables connect the free edge of each of the propulsion wings to the trailing edge of the centerboard to stop the outwardly movement of the wings at a point no more than 90.degree. from the centerboard during the rearward movement of the lower portion of the centerboard whereby the propulsion wings provide enlarged and effective surfaces to the surrounding water to forcefully propel the craft through the water.

REFERENCES:
patent: 817810 (1906-04-01), Sheen
patent: 1204937 (1916-11-01), Carley
patent: 1324397 (1919-12-01), Hobart

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