New York-based Bernstein Research issued an upbeat report on Pratt and Whitney’s PW1000G geared turbofan. It said Pratt expects a 16% better fuel burn for the 30,000-lb.-thrust engine on the A320 after including effects of drag and weight caused by the larger fan. Noise is expected to be 20 dB better than Stage 4, which should result from simple physics as the fan blade tips remain subsonic in a geared engine, it said. "Long term, Pratt believes that it can reduce fuel burn ...

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