In order to research electromechanical characters of the induction coil launchers during the launching process, an experimental installation of single stage induction coil was established. The circuit current was measured by using Rogowski coil. And electromechanical model was simulated by referencing the engineering practice. During the experiment, muzzle velocity of the projectile and charging voltage were gained. The experimental results showed that muzzle velocity of the projectile was almost linear with the charging voltage of the capacitor bank when the initial position of the armature was fixed. The muzzle velocity of the projectile increased firstly and then decreased when the distance between the initial position of the armature and the centre of the drive coil increased gradually while the discharge voltage were invariable. Therefore there exists the best initial position of the armature at which the projectile can get maximal muzzle velocity, which was well matched with the simulation results.