This paper describes the process of a coil launcher parameters selection. Objective function Θ was defined and crucial variables were sought. The electro-mechanical system consisting of a copper coil and a ferromagnetic core was designed. Displacement of the core was computed. The magnetic force and coil inductance were calculated in many core position in relation to solenoid. Simulations were done by means of Finite Elements Method (FEM). The model parameters were being changed and the best system geometry was sought. In order to achieve better legibility, the research results were shown in the graphs. Selection process turned out to be very complex. In order to determine the best device parameters, the currents thermal effects should be taken into consideration. As the final conclusion some constructional conceptions of the magnetic launcher were proposed. The research will be continued to improve the coil launcher optimization process. The aim of future investigations is to achieve greater magnetic force and lower inductance of the electro-mechanical system.