초록 ▼

Disclosed are airfoil structures which provide two distinct mean centers of lift and high induced drag. Also disclosed are aircraft structures employing such high-lift high-drag airfoils for both the lifting wing and the horizontal stabilizer with the center of gravity disposed between the mean cent

Disclosed are airfoil structures which provide two distinct mean centers of lift and high induced drag. Also disclosed are aircraft structures employing such high-lift high-drag airfoils for both the lifting wing and the horizontal stabilizer with the center of gravity disposed between the mean centers of lift of the fore and aft airfoils.

대표청구항 ▼

An aircraft including a fuselage, wings and a horizontal stabilizer longitudinally displaced from the wings, said wings and horizontal stabilizer each consisting of an airfoil having a leading edge and a trailing edge and which defines a chord extending along a straight line connecting the leading e

An aircraft including a fuselage, wings and a horizontal stabilizer longitudinally displaced from the wings, said wings and horizontal stabilizer each consisting of an airfoil having a leading edge and a trailing edge and which defines a chord extending along a straight line connecting the leading edge of said airfoil to the nearest point on the trailing edge thereof, wherein: (a) said wings define an airfoil with an upper surface and a generally concave lower surface adjacent the trailing edge of said airfoil, the generally concave shape of said lower surface adjacent the trailing edge formed by a curved surface which, at least at one horizontal position, deviates downwardly at a greater angle than said upper surface at the corresponding horizontal position and which deviates downwardly with increasing distance from the leading edge so that the trailing edge of said airfoil is defined by a relatively broad flat surface lying in a plane substantially normal to said chord; (b) said horizontal stabilizer defines an airfoil with an upper surface and a generally concave lower surface adjacent the trailing edge of said airfoil, the generally concave shape of said lower surface adjacent the trailing edge formed by a curved surface which, at least at one horizontal position, deviates downwardly at a greater angle than said upper surface at the corresponding horizontal position and which deviates downwardly with increasing distance from the leading edge so that the trailing edge of said airfoil is defined by a relatively broad flat surface lying in a plane substantially normal to said chord; and (c) the center of gravity of said aircraft is located between the mean center of lift of said wings and the mean center of lift of said horizontal stabilizer.