Abstract: A missile launcher comprises a supporting structure a bearing shoe connected to a supporting structure by links articulated so as to form a deformable parallelogram. A fluid pressure cylinder releases a locking system securing the missile on the structure and actuates the links in a direction causing the shoe to push the missile away. The shoe has a sufficient length for determining the distance between the missile and the aircraft at the end of its stroke and also the angular position of the missile. With that arrangement, the position and angular speed of the missile when the thrust of the shoe ceases may be accurately determined.