DELTA-PLANE Russian patent published in 2003 - IPC

FIELD: light aircraft manufacture; designing deltaplanes. SUBSTANCE: proposed delta- plane has flexible wing 1 with trapezium 2 articulated at point 3 of suspension of wing 1 on pylon 4 of trolley 5 where two seats 6 and 7 are mounted in tandem, power plant 8 with pusher propeller 9 mounted after trailing edge of wing 1 and rigid wing 10 projecting above its surface; center section of this wing is mounted on lower portion of trolley 5 above plane of rotation of blades of propeller 9; delta-plane is also provided with stabilizer 12 mounted after propeller 9 at negative angle relative to longitudinal axis of trolley 5 which does not exceed angle of attack of beginning of stall on it; it is secured to center section by means of two fins. Flexible wings 1 and propeller axle are mounted in accordance with the following formula: P Hp + Yk Xgk = 0, where P is thrust force of propeller 9; Hp is distance between axis of propeller 9 and point 3 of suspension of wing 1; Yk is normal aerodynamic force of rigid wing 10; Xgk is distance between line of action of normal force of rigid wing 10 and point 3 of suspension of flexible wing 1. EFFECT: improved take-off , landing and aerodynamic characteristics ; enhanced safety of flight. 4 dwg