REGIONAL AIRCRAFT Russian patent published in 2007 - IPC B64C3/14 

FIELD: aeronautical engineering.

SUBSTANCE: proposed aircraft has fuselage, straight wing and horizontal swept tail surfaces at sweep angle of χ about 18-24^o at supercritical profiles which are formed over medium lines having "shelf" nature at section of from 10 to 40% of local chords at ratio of respective ordinates of medium lines of 0.75-1.0. Thickness ratio of wing changes from 0.16 to 0.13, twist angles change from +2.5 to -1.5^o by wing span according to linear law. Twist angles of tail profiles are constant.

EFFECT: reduction of mass; improved aerodynamic property; enhanced efficiency.

10 dwg