MULTIMODE AIRCRAFT OF INTEGRAL AERODYNAMIC CONFIGURATION Russian patent published in 1999 - IPC

FIELD: aviation. SUBSTANCE: load-bearing case of aircraft is formed by high-lift wing and fuselage. Vertical and horizontal tails are mechanized. Aircraft is provided with electric remote control system including normal and angle of attack limiter, artificial stability system, stabilizer position manual correction system in subsonic flight at supercritical angles of attack and device for resetting stabilizer control mode at such flight. This device includes unit for disconnecting the normal g and angle of attack limiter, unit for disconnecting the artificial stability system and unit for switching on the manual correction system. Aircraft is provided with device for minimization of unsymmetrical flow-around in subsonic flight at angles of attack of 40 to 50 deg and device for stable operation of engine in subsonic flight at angles of attack of up to 150 deg. Area of stabilizer is equal to 9-12% of area of plan projection of load-bearing case; rate of reversal of stabilizer is no less than 30 deg/s. Ratio of pitching moment of inertia of aircraft to product of area of plan projection of load-bearing case by mass of aircraft does not exceed 0.20. Ratio of areas of plan projections of parts of load-bearing case located in front of and behind center of gravity to each other does not exceed 0.9 which makes it possible to design aircraft for supersonic flights and for super-maneuverability in subsonic flight at dynamic shift to large supercritical angles of attack. EFFECT: enhanced efficiency. 4 cl, 16 dwg