Rolls-Royce pushed a 100% hydrogen jet engine to full power, and the hardest part of clean flight may be hiding inside the engine

This was not a one-off experiment built for a headline. The hydrogen work followed a staged path, beginning in 2022 when ...
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Rolls-Royce still eyeing hydrogen as it praises Pearl’s polished performance

Engine maker hails results of Stennis combustion ground tests using modified business jet engine. Rolls-Royce is pressing ahead with further research intended to optimise engines for hydrogen ...