Non-broaching boat hull

Details Non-broaching boat hull Non-broaching boat hull

1976-05-07

1978-04-11

Knowles, Allen N.

Ships

Hull or hull adjunct employing fluid dynamic forces to...

114 56, D12 62, B63B 118

Patent

active

040833208

ABSTRACT:
A hull is provided including an aft transom and upstanding freeboard sides extending forwardly from the stern and terminating in a forward bow. The hull includes bottom structure having a central keel extending horizontally forward from the transom and curving upwardly at its forward end portion to form the aforementioned forward bow. The bottom structure includes opposite side deadrise surfaces extending outwardly from the keel and the deadrise surfaces decrease in width to a forward apex defined by the forward extremities of the deadrise surfaces. The forward end portions of the deadrise surfaces curve upwardly into the lower portion of the bow and the angle of the deadrise surfaces relative to transverse horizontal lines does not increase from the transom toward the aforementioned apex. Opposite side outer bottom surfaces extend between the remote marginal portions of the deadrise surfaces and the lower marginal portions of the freeboard sides. The outer bottom surfaces increase in width at least from the transom to the lowermost point of the upwardly curving bow and the angle of the outer bottom surfaces relative to transverse horizontal lines remains at least substantially constant from the transom forward to at least the lower portion of the upwardly curving bow. Further, the angle of the outer bottom surfaces relative to transverse horizontal lines is at least slightly greater than corresponding transverse portions of the adjacent deadrise surfaces.

REFERENCES:
patent: 3363598 (1968-01-01), Mortrude
patent: 3495563 (1970-02-01), Reischmann

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