All tests of the UltraFan demonstrator in Rolls-Royce’s specially built Testbed 80 will run on 100% sustainable aviation fuel.
Credit: Mark Wagner/Aviation-Images
Rolls-Royce has run the UltraFan demonstrator for the first time, marking the start of an extensive test program for the world’s largest geared turbofan and—the engine-maker hopes—the birth of a new generation of more efficient propulsion systems. The demonstrator was started quietly and without...
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