Scooped boat hull having tri-keel surfaces

Details Scooped boat hull having tri-keel surfaces Scooped boat hull having tri-keel surfaces

1978-01-23

1980-03-11

Frankfort, Charles E.

Ships

Displacement-type hull

114 62, 114288, B63B 106

Patent

active

041922484

ABSTRACT:
A boat hull having a bow and stern and requiring relatively small draft, having low frictional drag characteristics for high speed, stable performance, wherein the hull has a scooped configuration and defines a tri-keel design, wherein the side and bottom walls, making up the hull, define a first, open scoop portion and a second primary keel portion. The open scoop protion is of concave, curvilinear configuration and extends to a point rearwardly of the mid-point of the hull where it merges into the second or primary keel portion. The bottom and side walls of primary keel portion are V-shaped in configuration to thereby define the primary keel which extends from the merging surface to the stern. The first and second portions also cooperatively define about co-extensively therewith, extending from the open scoop portion, a pair of spaced apart secondary keels which extend from the approximate box of the hull to the stern thereof. The side walls define, upwardly spaced from the secondary keel portions, chine means extending from about the bow to the stern of the hull.

REFERENCES:
patent: 1898876 (1933-02-01), Heljesson
patent: 3077851 (1963-02-01), Bamberger
patent: 3208421 (1965-09-01), Landes et al.
patent: 3807337 (1974-04-01), English et al.
patent: 3884171 (1975-05-01), Kline
patent: 3937164 (1976-02-01), Austin
patent: 3996869 (1976-12-01), Hadley
patent: 4002131 (1977-01-01), Mangrum
patent: 4091761 (1978-05-01), Fehn

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