flow area calculated nozzle effective throat area design point nozzle effective throat area nozzle geometric throat area shaft angular acceleration arbitrary lines which dissect the corrected speed lines on a compressor characteristic specific heat at constant pressure for air specific heat at constant pressure for combustion products calculated nozzle discharge coefficient thrust coefficient ambient pressure/Sea Level ambient pressure turbine enthalpy drop/inlet temperature change in mechanical shaft speed excess shaft power excess shaft torque compressor polytropic efficiency turbine polytropic efficiency acceleration of gravity gross thrust net thrust ram drag ratio of specific heats for air ratio of specific heats for combustion products spool inertia mechanical equivalent of heat constant constant constant flight Mach number compressor mechanical shaft speed compressor corrected shaft speed turbine corrected shaft speed static pressure stagnation (or total) pressure compressor pressure ratio intake pressure recovery factor gas constant density specific fuel consumption (turbine) rotor inlet temperature static temperature or time stagnation (or total) temperature intake stagnation temperature compressor delivery total temperature ambient temperature/Sea Level, Standard Day, ambient temperature total temperature/Sea Level, Standard Day, ambient temperature velocity mass flow calculated turbine entry corrected flow compressor corrected inlet flow design point turbine entry corrected flow corrected entry flow from turbine characteristic (or map) combustor fuel flow