Airboat systems and methods for increasing engine efficiency whi

Details Airboat systems and methods for increasing engine efficiency whi Airboat systems and methods for increasing engine efficiency whi

1997-08-12

1998-11-24

Barefoot, Galen L.

Marine propulsion

Air propelled boat

244 65, 416170R, B63H 702

Patent

active

058399267

ABSTRACT:
An airboat propelling system is provided wherein a propeller is rotated by a hollow driven shaft. A further embodiment is provided wherein two propellers are rotated in opposite directions by counter-rotating coaxial hollow driven shafts. Floating stiffener bearings positioned between the coaxial hollow driven shafts suppress flexion and protect the opposing surfaces of the shafts. These innovative techniques permit a minimization of size and weight, as well as a reduction in rotational speed of the propellers, maximizing efficiency and decreasing noise.

REFERENCES:
patent: 2525708 (1950-10-01), Morris
patent: 3500784 (1970-03-01), Reynolds
patent: 4826458 (1989-05-01), Irwin et al.

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