| 摘要 |
FIELD: transport.SUBSTANCE: invention relates to helicopters. Helicopter rotor comprises propeller hub, several balanced and aligned blades with working airfoils that have leading and trailing edges arranged over the rotor diameter. Rotor blade bottom airfoils are furnished with thin 5-15 mm-high webs arranged in circle arc of diameter Di corresponding to iweb at Di varying from 0.2-1 diameter of the rotor Dwith pitch of 0.03-0.1 of D.EFFECT: higher lift and fuel efficiency.2 dwg |
