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. Show more
Discover 11,128,835 listings and 279,799 playable programmes from the BBC
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. Show more