Rolls-Royce's facility at Solihull, UK is started tests to prove aerospace cryogenic liquid hydrogen pump systems. These will address a key engineering challenge of taking low-pressure liquid hydrogen, chilled below -250°C, and pressurising it so that it can then be pumped into an engine to be combusted.

In September, Rolls-Royce set a world first when tests on a full annular combustor of a Pearl 700 engine at DLR in Cologne running on 100% hydrogen proved the fuel can be combusted at conditions that represent maximum take-off thrust.