Cold-weather testing of lean-burn combustor technology, a crucial element of Rolls-Royce’s future UltraFan geared engine family, is underway on a modified Trent 1000 demonstrator powerplant at the company’s Manitoba icing facility. Ground tests of the ALECSys (Advanced Low Emissions Combustion System) demonstrator come just over a month after the engine completed initial runs at Rolls-Royce’s Derby, England, site. The icing tests will pave the way for a follow-on noise ...

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