{TAIL ~ 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 a ‘fixed’ CROF system 
{ TAIL ~ 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 a ‘ fixed ’ CROF system
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