{TAIL ~ Noise reduction} in {HEAD ~ counter rotating fan propulsion} is accomplished by providing an engine core, driving an outer blade row from the engine core and driving an inner blade row from the engine core 
{ TAIL ~ Noise reduction } in { HEAD ~ counter rotating fan propulsion } is accomplished by providing an engine core , driving an outer blade row from the engine core and driving an inner blade row from the engine core
TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH