The open loop response analysis of duck wing with trust resistance balance and constant elasticity

A kind of virtual flying condition is assumed that the trust and resistance is the same that can keep the force balance during the flying process of high speed aircraft. The main function of this virtual assumption is that it can the unstable open loop aircraft fly a longer time so more date can be gotten and the duck wing response or effect can be analyzed more clearly. So it is a new method and it is effective and meaningful for the open loop dynamic analysis especially for high speed unstable control objects.