Charles Bombardier, Canadian inventor, released a concept design last year for the Skreemr, a jet that would be able to fly at Mach 10 . Travelling at 7,673 miles per hour, the 75-seater Skreemr would get from the UK to the east coast the US in around 30 minutes. But he pointed number of technical problems which no readymade solution.
Joseph Hazeltine, an aerospace engineer at Wyle, which works with NASA among others, provided solutions to some of these problems, called "long penetration mode" or LPM.
Hence the new concept for Mach 24 was created.
Airbus recently filed for a patent for a supersonic jet that could cut the flight time from London to New York to one hour.