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

Hopkins, Edward J.
naca-rm-a8a16
1948


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.

An Adobe Acrobat (PDF) file of the entire report:
http://naca.central.cranfield.ac.uk/reports/1948/naca-rm-a8a16.pdf