is the flow discharge coefficient (determined experimentally). Aclearcap A sub c l e a r end-sub is the instantaneous clearance area. are upstream pressure and temperature. Pdcap P sub d is downstream pressure. is the isentropic exponent.

The prototype was built and wheeled into the testing bay. As the motor roared to life and the twin screws spun at 3,000 RPM, the digital sensors began to climb. The engineers gathered around the monitor. 6.1... 6.2...