Utenkova V. Modification take-off trust-to-weight provided equality its abortive take-off distance with base version one

Compound trapezoid wings of planes of a transport category with lengthening it is more 5 and less 12.модели than definition of geometrical parameters: the general(common) narrowing, narrowings of the trapezes forming a compound wing, coordinates of breaks of a compound wing on his(its) scope, units geometrical крутки local chords of a compound wing. The method of research is based on for the first time entered two private(individual) criteria- by criterion of equality of a shape form of a designed wing with a shape formof equivalent elliptical wing (Kфс = Kфэ);- by criterion of minimum value of factor of increase of inductive aerodynamic drag (Bс=Bmin). On the basis of the carried out researches recommendations to development engineers of modifications of airplanes An-140 and An-148 to increase their wing efficiency are worked оut.The received results can be used at a stage of preliminary designing, and also by development of updating of a wing of already created planes, for example, such as Ан-140 andАн-148. At realization of the offered(suggested) method increase of aerodynamic quality of a wing on 1,8 … 2,1 units is provided. Sphere of use is creation of compound wings of planes of a transport category.