Watercraft propulsion device

Details Watercraft propulsion device Watercraft propulsion device

1986-10-14

1987-08-25

Powell, Jr., Everette A.

Fluid reaction surfaces (i.e., impellers)

Oscillatory reaction motion

Relatively movable working member portions

416 74, 416 83, B63H 136

Patent

active

046889949

ABSTRACT:
A watercraft propulsion device having a forward and a rearward foil in nested relationship for reciprocal oscillating movement in opposite directions having a foil angle greater than 0.degree. and less than 60.degree..

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patent: 3165086 (1965-01-01), Eastep
patent: 3834343 (1974-09-01), Hopkins
patent: 3874320 (1975-04-01), Wood
patent: 4178128 (1979-12-01), Gongwer

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