Abstract
Theoretical and experimental investigations are performed for Clβ of unswept flat (no dihedral) wings in sideslip. Theoretical investigations involve Vortex Lattice Methods and a sort of Slender Wing Theory. The Vortex Lattice Methods are applied in two forms; the one is Frozen Lattice Method (FL Method) and the other is Streamwise Lattice Method (SL Method).FL Method and Slender Wing Theory give generally good results and SL Method gives good results for elliptic wings, but not so for rectangular wings. The experiments give ClβCL for rectangular and elliptic wings of aspect ratio 2, 3, 5, 7, and show vortically separated flows on upstream side edge of sideslipping wings. Thus it may be probable that the reasonable analysis should take account of such vortically separated flows.
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