Ladies and gentlemen. I have been trying for literally days on this problem and its completley done me in. The problem is as follows. I have to evaluate a jet engine using the SFEE equation. So far I have concluded that this equation will be the best to use... Qr – Wrx = ṁ Δ [ h + ½ Ṽ2]. Although my problem is I only have the following data available to me... "h0e/he ratio of total-to-static enthalpy at exit from the engine h1 J/kg enthalpy at entry to the engine Ṽ1 m/s airspeed at entry to the engine ṁ engine air mass flow rate, kg/s κ fraction of fuel energy input lost to the atmosphere Pe static pressure the engine exit, kPa You should assume Cp/R for the exhaust gases to be 4.33, and take the calorific value of the fuel to be 43 MJ/kg." and I cannot work out for the life of me how to do it. I really hope someone on here can help. Thanks.. Daniel.