Subsonic Theoretical Lift-Curve Slope, Aerodynamic Centre and Spanwise Loading for Arbitrary Aspect Ratio, Taper Ratio and Sweepback

摘要

Full solutions by subsonic lifting-surface theory are tabulated for 64 planforms with systematic variation in aspect ratio, taper ratio and sweepback. The results indicate that existing data sheets incur errors of up to at least 7% in lift slope, 0.02 aerodynamic mean chord in aerodynamic centre and 0.012 semi-span in spanwise centre of pressure. With the aid of sonic theory and the usual similarity rules, alternative graphical presentations of the new data are discussed. A simple relationship between lift-dependent drag and spanwise centre of pressure is shown to hold within about 1%.