  The effects of rapid rotation and bi--stability upon the density contrast
between the equatorial and polar directions of a B[e] supergiant are
investigated. Based on a new slow solution for different high rotational
radiation--driven winds and the fact that bi--stability allows a change in the
line--force parameters ($\alpha$, $k$, and $\delta$), the equatorial densities
are about $10^2$--$10^3$ times higher than the polar ones. These values are in
qualitative agreement with the observations. This calculation also permits to
obtain the aperture angle of the disk.
