Benefits of this type of hull is the low production cost and the (usually) fairly flat bottom, making the boat faster at planing. sail boats with chined hull make use of a dagger board or keel. sail boats with chined hull make use of a dagger board or keel.. Prior art keywords bottom transom propeller planing boat hull prior art date 1975-12-10 legal status (the legal status is an assumption and is not a legal conclusion.. Phil, thanks for the link. wider and flatter as wider and flatter than the rest of the hull, as opposed to a traditional displacement sailing hull where the transom is narrower than the widest bean, and certainly no flat run aft..
Planing hulls tend to be of flatter sections and have a wider stern and are designed to run at three or more times hull speed. displacement hulls are designed to be efficient at hull and below speed and tend to have long curved lines.. Planing boat theory. first, a disclaimer. the energy consumed in pushing the water sideways by the angle of the v (deadrise) makes the v bottom boat a less efficient planing hull than the flat bottom one. there are, however, many good reasons for choosing a v bottom hull over a flat one.. A boat hull form in which the bottom portion of the hull is defined by two principle surfaces elongated longitudinally on each side of the centerline such that one of the surfaces is an inner surface which extends between the centerline of the hull and an inner bottom chine and the other surface is an outer surface which extends between the.