Predicting a vehicle's attitude response to a single yo despin

The method developed for analysis of single yo despin systems is a two step process. The first step utilizes the despin equations for a yo or yo-yo system to compute the cable tension force and its point of application on the body throughout the despin process. The second step considers the actual body configuration and treats the force just discussed as a prescribed external force acting on the surface of the body at the physical location of the despin system. The resulting vehicle coning angle is first computed using a digital computer program for a body with no initial coning prior to despin. Closed form solutions which utilize the previous results are then used to treat the effects of initial conditions.