Safran is preparing to begin key wind-tunnel tests of a fuel-saving geared open-rotor engine being developed under Europe’s Clean Sky government-industry research program. Under Clean Sky’s Sustained and Green Engines (SAGE) program, the tests of a 1/5th-scale powered model at French aerospace research organization Onera in Modane will measure performance and acoustics. Safran company Snecma is aiming for a fuel-burn reduction of 25-30% over today’s CFM56 turbofan, and a noise level ...

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