Someone will have to back me up on this, but "Zero-Pressure Boost" can help the engine with volumetric efficiency at cruise and assist with pumping losses, increasing FE. The question becomes how much energy does it require to spool the turbine to achieve this situation...
Have fun with that new SGII software!
-RH77
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“If we knew what we were doing, it wouldn't be called research” ― Albert Einstein
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