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    07/12/2011
Flying at many times the speed of sound has been an elusive goal of aeronautical engineers for many years. Gareth Mitchell looks at how near we are to achieving hypersonic flight.
Producer: Julian Siddle.
Last on
            Wed 7 Dec 2011
            21:00
        
        ÃÛÑ¿´«Ã½ Radio 4
    Broadcast
- Wed 7 Dec 2011 21:00ÃÛÑ¿´«Ã½ Radio 4
 
Podcast
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            Frontiers
Programme exploring new ideas in science and meeting the researchers responsible