Flow near the Apex of a Plane Delta Wing

A series expansion is obtained for the exponent n of the singularityof the solution of Laplace's equation for the flow near theapex of a plane delta wing when the angular sector occupiedby the wing is small. A further term is found in the expansiondue to Legendre when the wing is almost a half-plane, and thevalue of n is determined numerically for a range of intermediatevalues of the apex angle.