A modified model of a ramjet engine, including the possibility to use solid fuels, has been implemented into FOI´s computational program EDGE. The model was developed by Volvo Aero Corporation (VAC) and makes it possible to perform coupled airframe-engine computations. The modified module has been verified on a typical ramjet powered missile using solid fuel. A complete geometry was not available and some critical parameters such as inlet and nozzle have been approximated from a performance model. Aerodata including thrust has been calculated for the estimated geometry and the new ramjet module This report describes the implementation of the new module into EDGE, how the geometry and mesh were created and how the computations were done. The results of the computations are published in a separate report. A discussion by Dag Wallström of the mid course guidance has also been included. Sören Hasselrot was responsible for the aerodata computations.