Geoffer,
The active SAR guys will confirm or alter this as needed.
Most winches these days are electric/hydarulic powered. An electric motor drives a pump that powers the winch giving you almost unlimited cycles available before you run out of fuel.
Winching speed is controllable up to 250'/minute until the last few feet which is slowed to allow the operator to control it better. It may not seem very fast, but until you have been the dope on the rope and experienced it for yourself you haven't lived.
A 61 looks small on the end of a 250' cable, really small.