Airbus' 250mph 'Racer' helicopter

It is set to be one of the fastest helicopters in the sky. Airbus has revealed a radical new concept it says will be able to fly at speeds of 250mph. The aerospace firm said it could revolutionise everything from search and rescue and air ambulances to private travel. The Racer demonstrator will use an innovative'box-wing' design, optimised for aerodynamic efficiency, will provide lift in cruise mode while isolating passengers during ground operations from the'pusher' lateral rotors designed to generate thrust in forward flight. Optimised for performance and low acoustic signature, these lateral rotors as well as the main rotor will be driven by two RTM322 engines.