The Supermarine S.6B was a British racing seaplane developed by RJ Mitchell of Supermarine Aviation works to take part in the Schneider Trophy competition of 1931. It represented the cutting edge of aerodynamic technology and led to the development of the WWII Supermarine Spitfire and the Rolls-Royce Merlin engine.
Despite the British government's pledge of support for the next race entrant after the 1929 victory, official funding was withdrawn two months later following the Wall Street Crash. This caused enormous public disappointment and after Lord Rothermere's Daily Mail newspaper launched an appeal and Lady Houston publicly pledged £100,000 the Government changed its position.
The RAF High Speed Flight was reformed and Mitchell, Supermarine and Rolls-Royce set to work with less than nine months to prepare a race entrant.
S1595 made the winning Schneider flight reaching a speed of 340 mph, flying seven perfect laps of the triangular course over the Solent, between the Isle of Wight and the British mainland. Seventeen days later, S1596 broke the world air speed record reaching 407.5 mph.