VESSEL COMPRISING AFT FOIL HAVING SPECIAL ORIENTATION TO PROVIDE FORWARDLY DIRECTED COMPONENT OF LIFT FORCE Russian patent published in 2019 - IPC B63B1/24 B63B1/26 B63B1/08 

FIELD: shipbuilding.

SUBSTANCE: invention relates to the field of shipbuilding, in particular to hydrofoil vessels. Disclosed is a vessel intended for operation in water space and comprising: a non-planing hull having a waterline and a longitudinal direction with a forward portion, an aft portion, and a central portion, the hull having an aft portion with a smaller water displacement relative to a water displacement at the central portion; and an aft foil affixed to the aft hull portion with one or more connecting members, and below the surface of the water, and spaced from the hull, the aft foil having a span, a chord, and a leading edge and a trailing edge relative to a forward direction, wherein the leading edge of the aft foil is tilted at a downward angle relative to the horizontal, wherein the aft foil has a chord and profile in longitudinal cross section, with a configuration to provide a lifting force, the tilt angle of the chord of the aft foil being measured with respect to the horizontal, wherein the aft foil is oriented to provide a continuous, upward, forwardly directed component of the lifting force. Aft and forward foils are designed to maintain immersion of at least 50 to 70 % of the vessel’s volume below the waterline in a steady state, while the forward foil prevents violation of the balance conditions of the vessel.

EFFECT: improving the hydrodynamic characteristics of the vessel.

20 cl, 1 tbl, 8 dwg