Deep-V tunnel stern boat

Details Deep-V tunnel stern boat Deep-V tunnel stern boat

1974-09-11

1976-02-10

Blix, Trygve M.

B63H 516

Patent

active

039371735

ABSTRACT:
A deep-V tunnel stern boat has the forward portion of the tunnel shaped for uniformly distributing the resurgent flow across the width of the tunnel and for smoothly forming the entrance curve to the tunnel to optimize a suction tending to lift the water into the tunnel. This is done by recessing port and starboard halves of the tunnel into the sides of the hull bottom so the tops of the tunnel halves are approximately parallel with the sides of the hull bottom at the deep-V angle and meet at an obtuse angle above the keel line. The tops of the tunnel halves are gradually shaped into a semi-cylinder around the upper half of the propeller, the tunnel sides are flared outward aft of the propeller, and exhaust ports are located in the flared tunnel sides. Such tunnels are also adapted for twin tunnel stern boats.

REFERENCES:
patent: 23105 (1859-03-01), Montgomery
patent: 3469557 (1969-09-01), Wollard
patent: 3515087 (1970-06-01), Stuart
patent: 3742895 (1973-07-01), Horiuchi
patent: 3744446 (1973-07-01), Gibbins
patent: 3811399 (1974-05-01), Kobayashi et al.

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