![Rolls-Royce](/sites/default/files/styles/crop_freeform/public/2021-10/revised_intelligent_engine_source_rolls-royce.jpg?itok=T8nh64TL)
Credit: Rolls-Royce
Two different approaches to reaching 100% sustainable aviation fuel (SAF) use in aircraft have been tested in flight. On Oct. 13 United Airlines conducted a test flight on a blend of two synthetic fuels that produced a 100% drop-in replacement for petroleum jet fuel, while Rolls-Royce conducted a...
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