Patent ID: 8795009
Filing Date: 2014-08-05
Classification: B63H,F02K,F05B,F05D,Y02T

Abstract:
1. A watercraft including a propulsion system, said watercraft comprising: an elongate hull having an arcuately shaped bow, a stem, and a hull lower surface extending therebetween; a shroud extends between a forward edge defining a fluid entrance and a rear edge defining a fluid outlet, said shroud forward edge is located rearward of said arcuately shaped bow with said shroud extending below a forward portion of said hull lower surface, said shroud in combination with said hull lower surface defining a conduit therethrough, said conduit comprising a fluid flow entry orifice partially comprising a section of said arcuately shaped bow extending forward of said shroud forward edge ensuring water drawn from a volume of water in front of the bow is directed beneath the hull and into said conduit and said fluid outlet arranged to direct a discharging fluid flow beneath said hull lower surface and rearward towards said stem, said propulsion system comprises a fluid flow generator, the shroud and a forward portion of said elongated hull lower surface; and wherein: said arcuately shaped bow and said conduit in combination at least partially form a funnel shaped forward-to-aft fluid path for water flow induced by said flow generator, said flow generator in operation producing a forward thrust vector and a Bernoulli thrust vector created by the forward-to-aft fluid flow of water flow along said partial funnel shaped forward-to-aft fluid path, wherein the fluid flow rate is greater at the bow of the hull compared to that fluid flow rate a stem of the hull, which generates the Bernoulli thrust in addition to a thrust generated by Newton's third law, wherein said Newton generated thrust is generated by the fluid flow generator.