Pratt & Whitney’s Geared Turbofan demonstrator engine has completed Phase II ground tests and has been cleared for flight testing on Pratt & Whitney’s 747SP flying test bed mid-year. Phase II, which began in April at Pratt & Whitney’s advanced test facility in West Palm Beach, Fla., focused on engine performance and ground acoustics with the Geared Turbofan engine’s flight capable nacelle system. The engine completed 120 hours of testing during Phase II and has logged a total 250 hours since ground testing began in November 2007. Pratt & Whitney is a division of United Technologies Corp.
The ground test program has been a complete success and the Geared Turbofan engine has met or exceeded all performance targets,” said Bob Saia, Pratt & Whitney vice president, Next Generation Product Family.
The Phase II test program included the acoustic measurements of the Geared Turbofan demonstrator engine. The tests measured the ground-level noise characteristics of the engine, which is expected to be 50 percent quieter than today’s engines and 20 dB quieter than International Civil Aviation Organization (ICAO) Stage 4 noise regulations. The testing used an array of 32 individual microphones around the engine test stand and 16 sound pressure transducers inside the engine to get accurate data for noise modeling.