Rolls-Royce intends by 2028 to be running two versions of its UltraFan demonstrator engine – one for widebodies and the other for single-aisles – with flight tests to follow by the end of the decade.

Modern Formula 1 engines are limited to a maximum of 15,000 revolutions per minute (RPM) by FIA regulations, though most teams typically operate between 11,000 and 12,000 RPM during races to stay ...