Further Wind Tunnel Tests on a 30 per cent. Symmetrical Suction Aerofoil with a Movable Flap

摘要

The present work was undertaken in order to extend the existing experimental information on the 30 per cent. Griffith suction aerofoil obtained by Richards, Walker and Taylor1 (1945), in particular :n(a) to investigate the behaviour of the wing when the flap was deflected,n(b) to test a wider slot and improved internal ducting system,n(c) to investigate further the variation of suction quantity with speed, andn(d) to find the variation of CD with suction quantity and with different surface conditions.