FIELD: transport.
SUBSTANCE: invention relates to propulsors for surface and underwater transport facilities. Ship propulsor comprises propelling screw. Top of every vane of said screw is provided with one concentric face transverse ridge arranged on screw work side. At least one propelling screw equipped with or not equipped with shroud, at least one vane and/or shroud of at least one propelling screw are provided with at least one flange fitted at the angle of attack. Said flanges are arranged in whatever point of the vane on suction and/or pressure side and/or in interlobe space.
EFFECT: higher efficiency.
18 cl, 22 dwg
