NACA-TN-2288

Abstract

Comparisons of the low-Speed experimental lift and hinge-moment parameters of flapped lifting surfaces with and without sweepback with values computed by several theoretical procedures are presented. Based on these limited results one theoretical method appears to be more s&- is factory than the other methods investigated and is therefore recommended for preliminary design estimates. to the section values of the lift and hinge-moment parameters for the effects of induced angle of attack and of induced camber to obtain the values for a finite aspect ratio. are obtained from the lift-Curve slopes calculated by the Weissinger method, and the induced-camber corrections are obtained from an adaptation of the Falkner lifting-surface procedure. recommended is based upon lifting-Surface theory, it may be applied without knowledge of this theory since the, necessary information is given in design charts presented herein and in NACA Rep. 921, 1948. Sample calculations are included.