The power shaft extends through and is supported by a counter rotation transmission unit which drives {TAIL ~ an inner blade row} in counter rotational motion to {HEAD ~ the outer blade row} 
The power shaft extends through and is supported by a counter rotation transmission unit which drives { TAIL ~ an inner blade row } in counter rotational motion to { HEAD ~ the outer blade row }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD