Propeller driven tunnel boat

Details Propeller driven tunnel boat Propeller driven tunnel boat

1986-12-23

1987-08-11

Peters, Jr., Joseph F.

Marine propulsion

Screw propeller

Having means to control flow around propeller

B63H 516

Patent

active

046858890

ABSTRACT:
A tunnel boat design that is not dependent upon turbulent or resurgent water flow is disclosed. A V-shaped portion of the tunnel and its adjacent rectangular-shaped tunnel portion "direct" water toward a funnel-shaped tunnel portion which "funnels" the water into a semi-circular tunnel portion surrounding the propeller. By obliquely positioning the V-shaped portion, the rectangular-shaped portion and the funnel-shaped portion of the tunnel at pre-determined angles with respect to the keel line of the boat, sufficient water is "lifted" upwardly within the tunnel and directed toward the propeller to propel the boat without causing turbulent or resurgent water flow and/or cavitation.

REFERENCES:
patent: 1007583 (1911-10-01), Loetzer
patent: 1108340 (1914-08-01), Criqui
patent: 3138130 (1964-06-01), Morgan
patent: 3626894 (1971-12-01), Stuart
patent: 3744446 (1973-07-01), Gibbons
patent: 3811399 (1974-05-01), Kobayashi et al.
patent: 4300889 (1981-11-01), Wormser
patent: 4609360 (1986-09-01), Whitehead

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