Ships – Hull or hull adjunct employing fluid dynamic forces to... – Stepped hull
Patent
1996-09-23
2000-05-09
Swinehart, Ed
Ships
Hull or hull adjunct employing fluid dynamic forces to...
Stepped hull
114 555, B63B 132
Patent
active
06058873&
ABSTRACT:
A personal watercraft includes an improved hull design which reduces drag on the watercraft and inhibits porpoising of the watercraft at high speeds, while providing adequate buoyancy when the watercraft is at rest. The watercraft hull includes a pair of steppers positioned toward the aft end of the watercraft hull. The rear stepper has a greater height than the front stepper. This design reduces the wetted area of the hull when the watercraft is up on plane. The second stepper, however, provides additional surface contact should the watercraft to porpoise in order to stabilize the watercraft. The hull design also includes improved foot steps and adjustable sponsons. The foot steps are sloped upwardly in order to provide greater control of the watercraft when leaning the watercraft in a turn.
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Swinehart Ed
Yamaha Hatsudoki Kabushiki Kaisha
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