An isentropic converging-diverging nozzle that reaches a Mach number of 4.00 at the exit, when the exit pressure is atmospheric (14.7 psia) and the inlet isentropic stagnation temperature is 70.0°F, is to be built using air as the working fluid.
Determine the required inlet isentropic stagnation pressure, the exit static temperature, and the exit to throat area ratio.