Fly from London to New York in 2½ hours: Radical supersonic concept plane has a top speed of 2,300mph and can take off and land like a helicopter

Called Flash Falcon, the new concept from Barcelona-based designer Oscar Viñals would have a capacity for 250 passengers in business and 'super tourist' classes. Thanks to a powerful thrust capable of reaching Mach 3 speed, transatlantic journeys would be drastically reduced. Viñals said the futuristic passenger jet would run on carbon-free energy, with a supersonic engine based on a portable fusion reactor.