초록 ▼

Two embodiments of hull designs for catamarans in which the sponsons are configured so as to provide a displacement type operation and in which the sponsons are configured so as to improve stability while reducing flow resistance. The sponsons are generally curved along their bottom surfaces and hav

Two embodiments of hull designs for catamarans in which the sponsons are configured so as to provide a displacement type operation and in which the sponsons are configured so as to improve stability while reducing flow resistance. The sponsons are generally curved along their bottom surfaces and have a width that begins at a knife edge, increases gradually toward midships, then decreases with an increasing width section at the rear end thereof. In one embodiment, the sponsons are asymmetric so as to reduce the generation of waves deflected inwardly toward the main hull. In another embodiment they are symmetric. The main hull is also provided with a step at its rear end so as to avoid wave interference and the sponsons have steps at their rear ends so as to reduce front end lift when travelling at high speeds and reduce flow resistance.

대표청구항 ▼

A catamaran comprised of a main hull having a V bottom defined by a pair of downwardly converging sides and a pair of sponsons each supported at a respective side of said main hull merging into the respective side thereof from forwardly extending tops spaced transversely outwardly from said respecti

A catamaran comprised of a main hull having a V bottom defined by a pair of downwardly converging sides and a pair of sponsons each supported at a respective side of said main hull merging into the respective side thereof from forwardly extending tops spaced transversely outwardly from said respective sides and having upper portions extending above the bottom of said main hull, the top sand inner sides of said sponsons each merging into the respective side of said main hull above the bottom of said hull, said sponsons having cross sectional areas in planes taken at transverse cross sections along the length and below the water line that begin generally at a knife edge and which increase in a stepless fashion in cross sectional area from the front toward amidships to a maximum and then reduce in a stepless fashion in cross sectional area toward the rear of the sponsons and then increase in a stepless fashion in cross sectional area toward the end thereof.