AIRCRAFT POSSESSING ENHANCED LONGITUDINAL STABILITY CHARACTERISTICS Russian patent published in 1996 - IPC

FIELD: aviation; manufacture of aircraft. SUBSTANCE: aircraft has fuselage 1 of rectangular section, wing 2 with engines 3, twin-fin unit located on two beams 4 which consists of fins 5 and combined stabilizer 6 connecting beams 4 and three-leg landing gear with nose wheel. Aircraft is provided with swivel structure 8 fitted on end of beam 4 which holds vertical and horizontal tails mounted at right angle; tails are of symmetrical form and profile; beams 4 are connected with fuselage 1 by means of load-bearing members 10 mounted in front of structure 8 which is swivel relative to axis of beam 4. Stabilizers are separate; they are mounted on outside of beam 4 in plane of wing 2; upper parts of fins 5 and stabilizers 6 are provided with devices 9 for their relative fixation; structure 8 holding fins 5 and stabilizers 6 is turned through angle ± 90^° deg; fins perform function of stabilizers and stabilizers 6 perform function of fins and under-fuselage strake. EFFECT: enhanced longitudinal stability characteristics and controllability of aircraft at large angles of attack. 2 dwg