Wing Commander George Hedley Stainforth AFC RAF (1899 - 27 September 1942) was a British Royal Air Force pilot and the first man to exceed 400 miles per hour.
George Hedley Stainforth was the son of George Staunton Stainforth, a solicitor. He attended Dulwich College and Weymouth College. He joined the Army before joining the Royal Air Force.
George Stainforth joined the Royal Air Force on 15 March 1923 and was posted to No 19 (F) Squadron on 10 April 1924. He was promoted after four years to Flight Lieutenant on 1 July 1928, and was posted to the Marine Aircraft Experimental Establishment (MAEE) for duties with the High Speed Flight, also known as The Flight.
Stainforth was serving with The High Speed Flight in 1929, as pilot of the Gloster VI entrant. The aircraft was withdrawn for technical reasons shortly before the competition, which was then won by his team-mate Flt. Lt. H. Waghorn in a Supermarine S.6.
On the following day, 10 September 1929, Stainforth took the Gloster VI up for an attempt at the record over a measured mile course. He achieved a top speed of 351.3 mph and a ratified world absolute speed record, averaged over four runs of 336.3 mph.