Developing a Launch Package for the PEGASUS Launcher

Rail guns are capable to far exceed the muzzle energies of current naval deck guns. Therefore, one of the most promising scenarios for the future application of rail guns in naval warfare is the long range artillery. Hypervelocity projectiles being propelled to velocities above 2 km/s reach targets at the distances of 200 km or more. At the French-German Research Institute, the PEGASUS launcher is used for investigations with respect to this scenario. The 6-m-long barrel has a square caliber of 40 mm. The power supply unit is able to deliver 10 MJ to the gun. Within this investigation, a complete launch package is being developed and experiments are performed that aim at showing that this package can be accelerated to velocities ranging from 2000 to 2500 m/s. A launch package consists out of an armature, a sabot, and the projectile. The armature ensures the electrical contact during launch and pushes the sabot with its payload through the barrel. The sabot guides and protects the payload during the acceleration. At the same time, the accelerating forces generated at the armature need to be transferred to the projectile. After the launch package has left the barrel, the sabot should open and release its payload, the projectile into free-flight. Here, the current status of the launch package development and results from Experiments with the PEGASUS rail gun is presented.