Every few thousand miles, we pull into a shop, wait our turn, and let a technician drain and replace the golden liquid that keeps our cars running. Jet engines, however, operate on a completely ...

This was not a one-off experiment built for a headline. The hydrogen work followed a staged path, beginning in 2022 when ...

Rolls-Royce initiated the UltraFan program more than 10 years ago, and the demonstrator engine is assembled and undergoing testing in Derby, England, at full power and running on Sustainable Aviation ...