The Royal Aircraft Factory S.E.4 was a single-engined single seat biplane designed and built at the Royal Aircraft Factory just prior to the start of the First World War. Intended to be as fast as possible it recorded a speed of 135 mph (217 km-h) which made it the fastest aircraft in the world in 1914 but no production followed and it was soon written off in a crash.
Made by Royal Aircraft Establishment.