  Winds from accretion disks have been proposed as the driving source for
precessing jets and extreme bipolar morphologies in Planetary Nebulae (PNe) and
proto-PNe (pPNe). Here we apply MHD disk wind models to PNe and pPNe by
estimating separately the asymptotic MHD wind velocities and mass loss rates.
We show that the resulting winds can recover the observed momentum and energy
input rates for PNe and pPNe.
