Both axes of the gimbal have {HEAD ~ a combination} of {TAIL ~ auxiliary generator} and motor with a locking mechanism 
of
Both axes of the gimbal have { HEAD ~ a combination } of { TAIL ~ auxiliary generator } and motor with a locking mechanism
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH