Rolls-Royce is preparing to conduct the first full-scale power tests of the gearbox at the heart of its new UltraFan engine, marking the start of the most critical phase yet in the company’s future civil powerplant development strategy. A mere six months since the engine maker began initial runs of the power gearbox (PGB) in the adjacent attitude test rig in Dahlewitz, Germany, the power tests will wring out the transmission system at levels up to 100,000 hp or beyond. The gear system ...

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