초록 ▼

A Vee bottom planing boat hull (32) has right and left steps (44 and 46) positioned so as to optimize the boat's trim angle at top speed, and defining right and left notches (48 and 50) in which are pivotally mounted left and right trim tabs (56 and 58) having forward leading edges (60 and 62) along

A Vee bottom planing boat hull (32) has right and left steps (44 and 46) positioned so as to optimize the boat's trim angle at top speed, and defining right and left notches (48 and 50) in which are pivotally mounted left and right trim tabs (56 and 58) having forward leading edges (60 and 62) along oblique pivot axes (64 and 66) causing outer corners (102 and 104) of trailing edges (68 and 70) of the trim tabs to move downwardly more than inner corners (106 and 108) during downward pivoting of the trim tabs, providing an active hull to control boat trim angle and effectively reduce deadrise angle while maintaining a running surface trailing edge substantially free of discontinuities in the vertical direction.

대표청구항 ▼

[ What is claimed is:] [1.] A Vee bottom planing boat having a hull extending from a bow rearwardly to a transom, said hull having a central longitudinally extending keel and right and left longitudinally extending chines spaced laterally outwardly and upwardly from said keel, right and left steps i

[ What is claimed is:] [1.] A Vee bottom planing boat having a hull extending from a bow rearwardly to a transom, said hull having a central longitudinally extending keel and right and left longitudinally extending chines spaced laterally outwardly and upwardly from said keel, right and left steps in said hull on respective right and left sides of said keel and defining right and left notches with respective right and left raised undersurfaces each extending rearwardly from its respective said step to said transom, right and left pivotable trim tabs having forward ends pivotally mounted to said hull at respective right and left pivot axes in respective said right and left notches and extending rearwardly from said forward ends along said notches, wherein said forward ends of said right and left trim tabs are spaced above the bottoms of said right and left steps, respectively, such that, at top speed and with said trim tabs pivoted upwardly, water breaks off said bottoms of said steps and does not re-attach to said trim tabs.