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'Son of Concorde'

Nasa's new supersonic jet aims to slash flight times

Mail Online
A new Concorde-style supersonic passenger jet could slash flight times to Australia in half within the next decade.
The X-59 Quiet Supersonic Technology aircraft is being built by Lockheed Martin - assisted by Nasa - to perfect quiet sonic booms that would allow the plane to go supersonic over land.
Concord, which was last flown in 2003, could not fly over land due to a powerful sonic boom that broke the sound barrier.
The X-59 is designed to cruise at 55,000ft at about 940mph and create just 75 Perceived Level decibel (PLdB) - about as loud as a car door closing.
Lockheed Martin said the move "marks a milestone to bring supersonic commercial travel over land one step closer to reality."
It comes after Qantas embarked on a 19-hour non-stop flight from London to Sydney earlier this month, with the new X-59 expected to half that as it reaches speeds of up to Mach 1.45.
A spot in one of the plane's 40 seats is also understood to be cheaper than Concorde, which were £5,774 - now worth about £10,000.
But Lockheed Martin, which normally produces military aircraft, is facing stiff opposition.
Denver's Boom Super-sonic has received 76 orders from groups including Richard Branson's Virgin and Japan Airlines.
It is also believed to be faster, reaching Mach 2.2 and topping Concorde's Mach 2.04.
Boom wants to cut times from London to New York to three hours, 15 minutes, but will only be able to fly at speed over the sea.
Peter losifidis, Low Boom Flight Demonstrator program manager at Lockheed Martin Skunk Works, told the Sunday Express: "Though a technological marvel, Concorde was a business failure. Commercial success wasn't the first priority, and that's why not many were built."
He added: "Other producers are not addressing the noise issue. Flying
a supersonic jet only over water is restrictive, the only benefit being the faster speeds.
"If you're only flying fast from London to New York can you sell enough tickets to enough passengers to make it successful? And with our technology just around the comer, their shelflife is limited too."
The X-59 will conduct its first flight in 2021.
It will be used to collect community response data on the acceptability of the quiet sonic boom generated by the aircraft, helping Nasa establish an acceptable commercial supersonic noise standard to overturn current regulations banning supersonic travel over land.
Last November Nasa began tests to see how Texas residents reacted to noise from experimental aircraft.
The space agency launched a research project as they continued to experiment for its next airliner dubbed the "Son of Concorde".
The aim of the testing was to see if residents living near the Texas Gulf Coast heard noise from the jets, travelling faster than the speed of sound, without making the explosive noise of a sonic boom.