<P> Meanwhile , test pilots achieved high velocities in the tailless , swept - wing de Havilland DH 108 . One of them was Geoffrey de Havilland , Jr. who was killed on 27 September 1946 when his DH 108 broke up at about Mach 0.9 . John Derry has been called `` Britain 's first supersonic pilot '' because of a dive he made in a DH 108 on 6 September 1948 . </P>
<P> Meanwhile , test pilots achieved high velocities in the tailless , swept - wing de Havilland DH 108 . One of them was Geoffrey de Havilland , Jr. who was killed on 27 September 1946 when his DH 108 broke up at about Mach 0.9 . John Derry has been called `` Britain 's first supersonic pilot '' because of a dive he made in a DH 108 on 6 September 1948 . </P>
who was the first british pilot to break the sound barrier
who was the first british pilot to break the sound barrier
John Derry
John Derry