The gear engagement is designed to drive {HEAD ~ the generator} at {TAIL ~ a rotational speed} well in excess of the wheel rotation rate 
at
The gear engagement is designed to drive { HEAD ~ the generator } at { TAIL ~ a rotational speed } well in excess of the wheel rotation rate
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH