GE unveils supersonic Affinity engine for Aerion AS2 business jet

Based on technology already well established in existing civil aircraft, the Affinity engine has been developed specifically for the Aerion AS2, a supersonic business jet designed to reach speeds of Mach 1.4. While Aerion had initially partnered with Airbus on the AS2 project, the European company was replaced by Lockheed Martin almost a year ago. Lockheed’s Skunk Works team has since been working on the airframe, while GE has been finalising the design of the first supersonic civil engine since the retirement of Concorde.

https://www.theengineer.co.uk/lockheed-martin-supersonic-as2/

According to GE, Affinity is a twin-shaft, twin-fan turbofan controlled by a Full Authority Digital Engine Control (FADEC) system. It is optimised for supersonic flight over water and subsonic flight over land, and designed to meet Stage 5 subsonic noise requirements as well as current emissions standards. GE claims Affinity will have an operational ceiling of 60,000 feet and the highest bypass ratio of any supersonic engine. Its combustor features advanced coatings for sustained high-speed operation, while additive manufacturing has been employed to optimise weight.