  The French-German Research Institute (ISL) has several railguns installed,
the largest of these is the PEGASUS accelerator. It is a 6m long, 4x4 cm2
caliber distributed energy supply (DES) railgun. It has a 10 MJ capacitor bank
as energy supply attached to it. In the past, this installation was used to
accelerate projectiles with a mass of about 300 g to velocities up to 2500 m/s.
In the ongoing investigation, it is attempted to accelerate heavier projectiles
to velocities above 2000m/s. For this a new type of projectile including a
payload section was developed. In this paper the results of the experiments
with payload projectiles using a primary energy between 3.8 MJ and 4.8 MJ are
discussed.
