초록 ▼

A wing type airfoil is used to propel a vessel. The airfoil comprises a mast, a counterbalancing airfoil and a driving airfoil. The mast is elongate and has upper and lower portions, the lower portion is adapted to be connected to the vessel and extends upwardly therefrom. The counterbalancing airfo

A wing type airfoil is used to propel a vessel. The airfoil comprises a mast, a counterbalancing airfoil and a driving airfoil. The mast is elongate and has upper and lower portions, the lower portion is adapted to be connected to the vessel and extends upwardly therefrom. The counterbalancing airfoil has a first angle of attack orientation and is connected to the mast. The driving airfoil has a second angle of attack orientation and is connected to the mast below the counterbalancing airfoil. The counterbalancing airfoil and the driving airfoil have different angles of attack which are independently adjustable with respect to the vessel.

대표청구항 ▼

A wing type airfoil adapted to be used to propel a vessel such as a sailboat, land vehicle, ice boat and the like in a substantially upright manner, and comprising: an elongate mast having upper and lower portions, said lower portion adapted to be connected to the vessel and extending upwardly there

A wing type airfoil adapted to be used to propel a vessel such as a sailboat, land vehicle, ice boat and the like in a substantially upright manner, and comprising: an elongate mast having upper and lower portions, said lower portion adapted to be connected to the vessel and extending upwardly therefrom, counterbalancing airfoil means having a first angle of attack orientation and being connected to said mast; a driving airfoil means for providing substantial driving force to the vessel having a second angle of attack orientation and being connected to said mast below said counterbalancing airfoil means, whereby the vessel tends to the upright and is propelled when wind blows past said airfoil.