  We have used the vectorised and parallelised magnetohydrodynamics code
NIRVANA on the NEC SX-5 and the new SX-6 installation in parallel mode to
simulate the interaction of jets with a galactic wind that might be typical for
the star-bursting radio-galaxies of the early universe.
  The two simulations, one axisymmetric and one in 3D show that the jet pierces
and destroys a thin and dense shell produced by the pre-installed superwind.
  We suggest that small radio galaxies at high redshift might be absorbed on
the blue wing due to the galactic wind shell, and possibly on the red wing due
to a cooling flow. In larger sources the jet cocoon will fill the wind cavity
and accelerate the shell. The Rayleigh-Taylor instability will then disrupt the
shell and disperse dense, possibly star-forming fragments throughout the
region.
