Verification of calculation method for unsteady airloads in the prediction of transonic flutter

Various engineering-type methods to calculate the unsteady airloads on wings in transonic flow were applied in flutter calculations for a semispan flutter model of a supercritical wing. A verification was performed on the basis of comparing flutter characteristics, in which special attention was given to the prediction of transonic dips in the flutter boundaries. It turned out that, when applied complementary, the methods are able to produce useful results.