Description: Examined problems of launching unmanned aerial vehicle using mortar start systems. The parameters of the starting device allowing to realize the acceleration of the aircraft at the minimum section of the guide. The analysis of the formation of solid fuel charge for a given value of the progression of burning law. Presented design tools for numerical research of working processes in this type of system start. Numerical experiments the optimal integral characteristics of the device, and field of gasdynamical parameters in the path of the expansion machine catapult.
Keywords: unmanned aerial vehicle, mortar start, burning law, starting overload