Are supersonic passenger flights going to make a comeback?

he last passengers to experience a transatlantic crossing in barely three hours boarded British Airways BA2 from New York JFK early in the morning of 24 October 2003. As the Concorde approached London later that day, it was joined by two other supersonic jets, which flew low over the capital before landing at Heathrow airport. The Anglo-French aircraft was grounded by a combination of high oil prices, low demand and concerns about safety following the 2000 crash in Paris in which 113 people died. The airline says: “British Airways withdrew Concorde, bringing to a close the world’s only supersonic passenger service.” Since then various companies have worked on possible new-generation high-speed aircraft, but one is well ahead of the field: Boom Supersonic, based in Denver. The Colorado company says its plane, known as Overture, will fly at Mach 1.7, which is one-sixth slower than Concorde but still twice the speed of conventional subsonic aircraft. At a cruising altitude of 60,000 feet, Mach 1.7 equates to a ground speed of around 1,050mph – slower than Concorde, but around twice as fast as current short-haul aircraft, which fly at around Mach 0.85. The range, says Boom, will be 4,888 miles (4,250 nautical miles). That is only about one-sixth more than Concorde’s maximum. Boom Supersonic says potentially there are more than 600 “profitable routes” for the Overture. Journeys from US east coast cities such as Boston, New York, Washington DC and Miami to London, Paris, Dublin, Lisbon and other European hubs are likely to comprise the key market.<br/>