Experimental study of a telescopic wing inside a channel

The aerodynamics of a telescopic wing inside a channel guideway is investigated experimentally. It is found that the change in the aspect ratio produces a larger favorable effect on the lift-to-drag ratio than the ground and sidewalls. It is shown that for a given angle of attack, the extension of the wing tip is not efficient at controlling the rolling moment. However, the current study is restricted to a relatively small change in the aspect ratio, due to the limitation of the mechanical device, which requires further study.