초록 ▼

A detachable hydro-planing foil for a marine outboard propeller drive comprises a plate having leading edges that are substantially backswept symmetrically from a plate centerline and trailing edges that are arced in a forward concavity substantially symmetrically from the centerline. Laterally of t

A detachable hydro-planing foil for a marine outboard propeller drive comprises a plate having leading edges that are substantially backswept symmetrically from a plate centerline and trailing edges that are arced in a forward concavity substantially symmetrically from the centerline. Laterally of the centerline, the plate terminates with plate tips that are down turned with a negative dihedral of between about 25.degree. and about 45.degree.. The forward concavity of the trailing edges sweeps the trailing edge forward of the forward propeller rotational plane.

대표청구항 ▼

[ I claim:] [1.] A marine propulsion assembly having a propeller driven about a rotational axis by drive means confined within a housing, a zone of propeller rotation emanating radially from said axis and a non-pivoting hydro-planing foil rigidly attached to said housing in a plane substantially par

[ I claim:] [1.] A marine propulsion assembly having a propeller driven about a rotational axis by drive means confined within a housing, a zone of propeller rotation emanating radially from said axis and a non-pivoting hydro-planing foil rigidly attached to said housing in a plane substantially parallel with said axis and above said propeller, said hydro-planing foil having leading edges, trailing edges and lateral tips, said trailing edges being substantially aligned in advance of said zone of propeller rotation so that water spray produced by the propeller during operation avoids contact with the hydro-planing foil.