Editing Supermarine (section)

===Schneider Trophy 1929 and 1931===
[[File:Supermarine S.6B ExCC.jpg|thumb|left|Supermarine S.6B, ''S1596'']]
For the next contest Mitchell created the all-metal [[Supermarine S.6|S.6]] which featured the smallest possible airframe that he could design around a Rolls-Royce engine instead of the Napier engines used in the S.4 and S.5.  This design won the 1929 contest.
For the 1931 contest Mitchell created the S.6a, a derivative of the S6. This won the contest and as Britain had won the trophy three times in a row it confirmed Britain as the outright and final winner of the Schneider trophy.

Following the contest a S6b, flown by Flt Lt G. H. Stainforth went on to set a new world air speed record of 407.5&nbsp;mph.