Supersonic flight was a barrier in the 1950s and it is still a major obstacle for commercial air travel. The environmental impact from noise and fuel consumption has remained an impediment for viable commercial supersonic air travel. Recent technological advances in propulsion and low shockwave design have initiated a number of design studies for SuperSonic Business Jets (SSBJ). This paper presents a conceptual design study of a Mach 4 supersonic business jet for 10 passengers and a full-payload range of 8,000 nm. An aircraft with these capabilities could reduce long range flight by about 75% making it an attractive value proposition for business and VIP travel. The project is based on the Pre-Cooled Turbojet Engine (PCTJ) concept developed by JAXA in Japan. A preliminary weight and engine sizing has been applied and aerodynamic analysis has been conducted to minimise the strength of the shockwave and sonic boom.
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