The problem of elastic plates, which is under combined action of super
sonic gas flow, mechanical transversal load and mechanical tangential
following load, is considered. It is proved that the solution of this
problem (in particular, flutter problem) for each anisotropic scalar-n
onhomogeneous plate may be obtained through the experiment with the on
ly orthotropic plate. The examples are given and generalization on pla
sticity is noted. (C) 1998 The Franklin Institute. Published by Elsevi
er Science Ltd.