Exemplary embodiment may provide a fan efficiency benefit of at least 1.0% relative to the combined spacing and cropping necessary to meet {HEAD ~ noise requirements} for {TAIL ~ a ‘fixed’ CROF system} 
for
Exemplary embodiment may provide a fan efficiency benefit of at least 1.0 % relative to the combined spacing and cropping necessary to meet { HEAD ~ noise requirements } for { TAIL ~ a ‘ fixed ’ CROF system }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL