Ships – Displacement-type hull
Patent
1976-08-12
1978-03-21
Blix, Trygve M.
Ships
Displacement-type hull
114 61, B63B 104, B63B 112
Patent
active
040796884
ABSTRACT:
A low-drag hull for high-speed displacement type water-craft is constructed with a constant-section keel-less midbody having a length equal to or greater than one-third of the waterline length of the hull, and with a run of less than one-sixth of the hull length. The balance of the hull comprises a slender entry defined by a linear basal ramp extending at the centerline for at least one-half of the length of the entry. The ramp slope is chosen in the range between 10:1 and 18:1. The parallel midbody is constructed with a full cross-section, the section coefficient being always greater than .785, and the ramped entry conforms, within the limits established by the need to fair in the bow and transition sections, to the sectional character of the midbody. The hull form shows a low wetted surface coefficient and sharply reduced wave-making resistance in the range between Froude numbers of 0.60 and 1.20.
REFERENCES:
patent: 996444 (1911-06-01), Yarrington
patent: 2899925 (1959-08-01), Meek
patent: 2950699 (1960-08-01), Ogden et al.
patent: 3566819 (1971-03-01), Keddie
Blix Trygve M.
Finkel Robert Louis
Goldstein Stuart M.
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