AEROBATIC TRAINER AIRPLANE ЯК-54 Russian patent published in 2002 - IPC

FIELD: aviation; aerobatic trainer airplanes. SUBSTANCE: proposed airplane has fuselage, power plant for driving the propeller, tapered encumbered with which consists of half-wings with ailerons and horizontal and vertical tails; planes of profile chords of each half-wing, longitudinal datum line of fuselage and propeller axis lie in one plane. Lower surfaces of ailerons of each half-wing are provided with aerodynamic balances in center portion. Wing aspect ratio ranges from 5 to 5.3, ratio of ailerons area to wing area ranges from 20 to 25 %, ratio of distance between aircraft CG and 25-% mean aerodynamic chord of vertical tail does not exceed 2/3 of aeroplane overall length. Control system provides for downward deflection of ailerons to 15 deg. at possibility of differentiated deflection relative to extended position. Aeroplane is provided with hatch with glass in lower portion of fuselage. EFFECT: flight handling and maneuvering characteristics under all flight conditions in performing complexes of aerobatic maneuvers. 7 cl, 6 dwg