Returning to FIG4F, {HEAD ~ control} of blade row spacing, pitch and applied shaft horsepower is accomplished through {TAIL ~ the combined actions} of the airplane flight management system and the full authority digital engine control unit which control blade scheduling system 60 
is accomplished through
Returning to FIG4F , { HEAD ~ control } of blade row spacing , pitch and applied shaft horsepower is accomplished through { TAIL ~ the combined actions } of the airplane flight management system and the full authority digital engine control unit which control blade scheduling system 60
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH