Rolling-power tests on an elastic model wing (M-planform) in low-speed flow

Abstract

Measurements and calculations of aileron effectiveness for an elastic model wing in low-speed flow are described. The experimental technique enabled rolling moments due to applied aileron and to rate of roll to be measured separately. Rolling moments were also calculated using measured flexibility coefficients and factored two-dimensional steady-flow aerodynamic derivatives. Experimental and calculated results were in good agreement. The wing tested was of M-planform, with two pairs of ailerons covering the inboard and outboard sections of the outer panels. The inboard ailerons were associated with a lower loss of control effectiveness.