An exploratory investigation of the relative merits of split and chord-extension flaps on a 45 degrees swept-back wing

Hopkins, Edward J.

Measurements of the lift, drag, and pitching-moment characteristics of a 45 degree swept-back wing of aspect ratio 4.5 equipped with split and chord-extension flaps are presented. Split flaps produced a negligible increase in the maximum lift coefficient but extended the linear variation of pitching-moment coefficient with lift coefficient to a higher value of lift coefficient. Chord-extension flaps gave sizeable increases of maximum lift coefficient but caused nonlinear lift and pitching-moment characteristics.

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