  We conduct 2D axisymmetrical hydrodynamical simulations to investigate the
interaction of a collimated fast wind (CFW; wide jets) with a spherical AGB
wind. The code includes radiative cooling. We find that the shape of the
planetary nebula (PN) is sensitive to the exact mass loss history of the AGB
wind, and the opening angle of the CFW. Some typical PN morphologies are
obtained, but many other observed morphologies seem to require more ingredients
than what we assume in our present simulations, e.g., equatorial AGB wind, and
ionization and fast wind during the PN phase. The hot bipolar bubble formed by
the jets is an X-ray source.
