  The scattering of massive particles by a Schwarzschild black hole also
undergoing a drag force is considered. The latter is modeled as a viscous force
acting on the orbital plane, with components proportional to the associated
particle 4-velocity components. The energy and angular momentum losses as well
as the dependence of the hyperbolic scattering angle on the strength of the
drag are investigated in situations where strong field effects cause large
deflections.
