A supersonic business jet (SSBJ) is a business jet travelling above the speed of sound: a supersonic aircraft. Some manufacturers are designing or have been designing SSBJs, but none are currently available. Usually intended to transport about ten passengers, proposed SSBJs would be about the same size as subsonic business jets.
Aerion SBJ project model
A supersonic aircraft is an aircraft capable of supersonic flight, that is, flying faster than the speed of sound. Supersonic aircraft were developed in the second half of the twentieth century. Supersonic aircraft have been used for research and military purposes, but only two supersonic aircraft, the Tupolev Tu-144 and the Concorde, ever entered service for civil use as airliners. Fighter jets are the most common example of supersonic aircraft.
The interaction of shock waves from two supersonic aircraft, photographed for the first time by NASA using the Schlieren method in 2019.
Bell X-1
A Lockheed SR-71 Blackbird supersonic reconnaissance aircraft
The fuselage of Concorde had an extremely high fineness ratio.