DISK-TYPE-FOILCRAFT Russian patent published in 2009 - IPC B63B1/28 

FIELD: ship building.

SUBSTANCE: invention relates to ship building, particularly to partially submerged disks-type-foil craft. Disks-foils are mounted at an angle of attack and feature V-shape cross section. Blades are fitted on shaft jointed to disk face and having the length that makes the distance between blade rotation plane and disk face equal at least four widths of disks (foils). It seems expedient to make aforesaid disks hydraulically rough or with radial ribs.

EFFECT: higher hydrodynamic lift and reduced hydrodynamic losses.

2 cl, 4 dwg