S-6B FloatplaneSupermarine S6B floatplane airplane model. On September 13, 1931, flying a Supermarine S. 6B, Flight Lieutenant George Stainforth raised the world absolute speed record to 379 mph on the same day that another S. 6B captured the Schneider trophy outright for Britain. These planes used a 2,350 hp version of the Rolls Royce "R" engine. The S. 6B later raised the speed record to 407 mph. Mahogany Wood. Scale: 1 20. Wingspan 18 inches, Length 17 1 2 inches