Lift and drag effects of wing-tip rake
This is a 1923 NASA technical report on aerofoil wing-tip shapes, compiled from NACA-era aerodynamic test data and published for aeronautical engineers and researchers. Its pictures are plain line graphs of lift and drag coefficients plotted against angle of attack for whole, half, square and rake wing tips, plus a dimensioned drawing of the R.A.F. 6 aerofoil section, offering a designer little beyond the clean chart conventions and labelled curve layouts.
