FAA's Supersonic Proposal Draws Praise and Protest
The EU called the FAA's supersonic NPRM premature, while many manufacturers endorsed its data-driven approach.
An FAA proposed rule would for the first time establish subsonic landing and takeoff cycle noise standards for supersonic airplanes other than the Concorde, such as the Mach 1.4 Aerion AS2. (Photo: Aerion Supersonic)