Ships – Building – Antifriction surfaces
Patent
1984-02-29
1986-05-13
Basinger, Sherman D.
Ships
Building
Antifriction surfaces
440 38, B63B 138
Patent
active
045879184
ABSTRACT:
An improved performance marine surface vessel with one or more recesses that intersect the hull substantially beneath the waterline thereof, the recess bounded by stabilizing, planing, catamaran-like sidehulls with bow shaped members located at its forward and aft portions and optionally therebetween, with the recess being supplied with pressurized gas to maintain a lift-augmenting, restrained pressurized gas layer under the hull that improves load-carrying capability, efficiency and ride quality. The keels of the sidehulls diverge for at least a portion of their length. The fore and aft bow shaped members, and optional intermediate bow sections in some cases, contact the water like small bow sections thereby improving hull ride and handling characteristics and reducing gas leakage. The bow shaped members, along with the catamaran-like sidehulls, provide gas flow restriction, sure tracking and turning characteristics when underway in any type of sea and proper hull attitude and trim without wallowing at low speeds or yaw, roll or pitch instability at high speeds even if the pressurized gas supply is wholly or partially inoperative. The diverging sidehull keels are important to the effectiveness of the invention in allowing narrow or fine entry forward with resulting improved ride characteristics and reduced gas leakage forward over earlier versions of the inventive hull. Further features of the invention are optional anti-skid skegs that may incorporate high aspect ratio water inlets for waterjet propulsors and controllable gas recess pressure distribution means to assist hull trim control under all conditions.
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Basinger Sherman D.
Van Der Wall Robert J.
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