An engine with a low design T1 combines high corrected flow with high rotor turbine temperature (SOT), maximizing net thrust at low T1 conditions (e.g. Mach 0.9, 30000 ft, ISA). However, although turbine rotor inlet temperature stays constant as T1 increases, there is a steady decrease in corrected flow, resulting in poor net thrust at high T1 conditions (e.g. Mach 0.9, sea level, ISA).