초록 ▼

A motor boat hull is provided with a longitudinal channel formed in the central portion of the underside surface, starting at an intermediate location and terminating at the stern. Exhaust gases from the propulsion engine are introduced into the forward portion of the channel and the gases flow towa

A motor boat hull is provided with a longitudinal channel formed in the central portion of the underside surface, starting at an intermediate location and terminating at the stern. Exhaust gases from the propulsion engine are introduced into the forward portion of the channel and the gases flow toward the stern thereby reducing the contact of the hull with the water and reducing the hull-to-water friction levels and reducing the power required to propel the hull at a given speed.

대표청구항 ▼

A hull for a motor boat having an internal combustion propulsion engine comprising a first pair of spaced apart vertical wall portions disposed on the undersurface of said hull and extending longitudinally with respect to said hull, a second pair of spaced apart vertical wall portions extending tran

A hull for a motor boat having an internal combustion propulsion engine comprising a first pair of spaced apart vertical wall portions disposed on the undersurface of said hull and extending longitudinally with respect to said hull, a second pair of spaced apart vertical wall portions extending transversely with respect to said hull, with a first of said second pair of wall portions disposed at an intermediate location between the bow and the stern of said hull and with a second of said second pair of wall portions disposed proximate to said stern of said hull, a horizontally disposed wall portion extending between said first and said second pair of wall portions and with said first pair of wall portions, said second pair of wall portions and said horizontal wall portion, in combination defining a longitudinal cavity which projects inwardly into said hull, a plurality of exhaust ports disposed on said first wall of said second pair of wall portions, with said exhaust ports directed longitudinally with respect to said hull and directed toward said stern and connection means connecting said exhaust ports with said propulsion engine for the purpose of introducing exhaust gases into said cavity in order to reduce hull-to-water friction, a pair of longitudinal keel members disposed, one each, on port and on starboard sides of said cavity, with lower surfaces of said keel members including a longitudinally grooved portion, and connection means disposed to introduce exhaust gases from said propulsion engine into forward portions of said keel members.