WING-IN-GROUND-EFFECT CRAFT WITH BLOW-UNDER ENGINES Russian patent published in 2005 - IPC

FIELD: shipbuilding and wing-in-ground-effect craft.

SUBSTANCE: proposed wing-in-ground-effect craft contains hull, wing, tail unit and power unit. Wing is installed at angle of 2-5є to base plane of wing-in-ground-effect craft so, that wing leading edge be at a distance from waterline above still water equal to 0.01-0.2 ( is mean aerodynamic chord of wing). End plates of height equal to distance between wing and base line are arranged at ends of wing span, with clearance between lower part of plate and base line equal to 0.1-0.2 m. Flaps with chord are attached to wing in stern part. Said flaps deflect through angle of -(5-10є) to +(40-60є). Lower edge of flap in shifted down position should not get behind base line of hull in area of arrangement of flaps. Engines of bow starting power unit are fastened on horizontal pylon coupled with hull structure. Axial line of engine air intake should be at distance from water line on still water being found from formula (dimensions in meters) where is rarefaction at engine inlet in meters of water column; is diameter of air intake. Installed angle of engine is found from formula where is distance from axial line along rear edge of engine to base line; ; is distance from leading edge of wing to base line; d is diameter of engine nozzle; is height of design wave at takeoff; is hull draught by bow; 1 is distance of leading edge of wing from nozzle exit section. Distance from nozzle exit section of engine to leading edge of wing in horizontal is found from equation where d is diameter of engine nozzle; is temperature of gases at nozzle exit section, K; is required temperature of wing structure, K. From one to three intermediate plates of length equal to 3/4 MAC and draught 0.1 m less than draught of hull in this area are rigidly secured to surface of wing.

EFFECT: improved performance characteristics of wing-in-ground-effect craft.

9 cl, 9 dwg