HELICOPTER Russian patent published in 2004 - IPC

FIELD: aviation; helicopters and their designing. SUBSTANCE: proposed helicopter has fuselage, lifting unit, steering rotor, two shaft-turbine engines which are mechanically interconnected by mans of main reduction gear, landing gear and control mechanisms. Lifting unit is made in form of upper and lower lifting disks of similar construction; each hollow disk is closed on one side by streamlined side surface whose open part is directed upward and its bottom has recess in form of segment; vertical fins form concentric wave passages. Lower surface of lower lifting disk is provided with four flaps opening downward which are kinematically linked with helicopter control mechanism. EFFECT: improved service characteristics of helicopter due to reduced overall dimensions, enhanced safety and simplified construction. 21 dwg