  We performed hydrodynamical simulations with and without radiative cooling of
jet models with parameters representative for the symbiotic system MWC 560. For
symbiotic systems we have to perform jet simulations of a pulsed underdense jet
in a high density ambient medium. We present the jet structure resulting from
our simulations and calculate emission plots which account for expected
radiative processes. In addition, our calculations provide expansion velocities
for the jet bow shock, the density and temperature structure in the jet, and
the propagation and evolution of the jet pulses.
  In MWC 560 the jet axis is parallel to the line of sight so that the
outflowing jet gas can be seen as blue shifted, variable absorption lines in
the continuum of the underlying jet source. Based on our simulations we
calculate and discuss synthetic absorption profiles.
  Based on a detailed comparison between model spectra and observations we
discuss our hydrodynamical calculations for a pulsed jet in MWC 560 and suggest
improvements for future models.
