Dr Paul Bruce and Dr David Estruch-Samper discuss the challenges facing designers of a new generation of vehicles that may one day carry passengers around the world at hypersonic speeds.
Main image courtesy of Reaction Engines
BBC News article: http://www.bbc.co.uk/news/magazine-16090841
BBC Radio programme (Discovery): http://www.bbc.co.uk/programmes/p00mhpns
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