초록

A V boat hull with air chamber substantially aft and entirely beneath the waterline. The air chamber reduces drag, thereby improving hull efficiency and speed, without substantially altering V hull handling characteristics and aesthetics.

대표청구항 ▼

In an improved V hull of the type having at least one bow, keel, stern, exterior surface and waterline wherein the improvement comprises: at least one recess in the hull substantially aft, said recess intersecting the exterior surface of the hull at substantially right angles thereto entirely below

In an improved V hull of the type having at least one bow, keel, stern, exterior surface and waterline wherein the improvement comprises: at least one recess in the hull substantially aft, said recess intersecting the exterior surface of the hull at substantially right angles thereto entirely below the waterline, having sidewalls substantially parallel to the keel for at least an aft one half of its area, said parallel sidewalls extending from the exterior surface of the hull and being distal from the waterline; at least one air inlet connected to the recess; at least one air supply duct in fluid communication with the recess through an air inlet; pressure control means providing hull trim adjustment in fluid communication with the recess; sealing means in an aft portion of the recess; at least one powered air blower having its discharge in fluid communication with the recess through at least one air supply duct, whereby the recess may be pressurized to substantially purge it of water creating therein a captured air chamber beneath the waterline thereby significantly reducing hull displacement, and induced, as well as friction, drag at all speeds.