{HEAD ~ Control} of the horsepower distribution, blade row spacing and pitch by the FADEC allows {TAIL ~ optimum downstream blade row} spacing for maximum swirl recovery and efficiency varying with upstream rotor shaft horsepower and forward airspeed 
allows
{ HEAD ~ Control } of the horsepower distribution , blade row spacing and pitch by the FADEC allows { TAIL ~ optimum downstream blade row } spacing for maximum swirl recovery and efficiency varying with upstream rotor shaft horsepower and forward airspeed
HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH