Projects for both large-scale and business jet (see lower) passenger supersonic and hypersonic airliners (Aerion SBJ, HyperMach SonicStar, Next Generation Supersonic Transport, Tupolev Tu-444, Gulfstream X-54, LAPCAT, Reaction Engines A2, Zero Emission Hyper Sonic Transport, SpaceLiner, etc.) were proposed and now are under development.
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The Avion de Transport Supersonique Futur (ATSF) also known as Alliance was a concept design for supersonic aircraft considered by British Aerospace and Aérospatiale.
Mary Goldring became particularly noted in the late 1960s as the Economists aviation correspondent, for her sustained and trenchant critique of the development programme for the Anglo-French Concorde supersonic aircraft, on the basis of noise, pollution and above all what she predicted would be disastrous commercial economics.