The chain dot curve in FIG 40 is the optimum curve for the ratio of {HEAD ~ the gas turbine output} to {TAIL ~ the gas turbine compressor pressure ratio} 
The chain dot curve in FIG 40 is the optimum curve for the ratio of { HEAD ~ the gas turbine output } to { TAIL ~ the gas turbine compressor pressure ratio }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL