I'm happy to announce that the drag generated by a vehicle may be used by a windmill as if it was wind. This of course creates extra drag but this drag is partially shared with the rider.
We thus have a free energy situation on our hands here. :-)
Drag is limited by the size of the vehicle. If any amount of this drag is turned into propulsion then that percentage (just) wont be available for slowing the vehicle down. It's not-there anymore.
