Colin Defries (1884–?) was an English racing driver and pilot who made his first powered aeroplane flight over Australia on 9 December 1909. He piloted a Wright Model A airplane approximately 100 yards (91 m), although the flight was not officially recognised. Defries managed to fly at a height of about 15 ft (5 m) at a speed of about 36 mph. He then lost control and crashed, that led to the opinion that no controlled flight was achieved. With the Aerial League and a newspaper denying that the flight had occurred at all, Defries made a second attempt on 18 December. Finally, his mechanic, R. C. Banks, made an attempt of his own on 1 March 1910, and crashed the plane again.
Wing Commander Harry Cobby wrote in Aircraft in March of 1938 that "the first aeroplane flight in the Southern Hemisphere was made in 1909 by Mr Colin Defries, a Londoner, at Victoria Park Racecourse, Sydney, in a Wilbur Wright aeroplane". Colin Defries was a trained pilot, having learnt to fly in Cannes, France. By modern standard his flight time was minimal, but in 1909 he had enough to become an instructor. He took it off, maintained straight and level flight, albeit briefly, and landed safely, on his first flight. His crash landing on his second flight demonstrated what a momentary lack of attention could cause while flying a Wright Model A.
In 1965 aviation journalist Stanley Brogden formed the view that the first powered flight in Australia took place at Bolivar in South Australia, the aircraft was a Bleriot monoplane with Fred Custance as the pilot. The flight took place on 17 March 1910, the day before Houdini’s flight.
It is acknowledged by Australian historians and the Aviation Historical Society of Australia that the definition of flight established by the Gorell Committee on behalf of the Aero Club of Great Britain dictates the acceptance of a flight or its rejection, giving Colin Defries credit as the first to make an aeroplane flight.
The Australian postal service in 2010 said 'Harry Houdini can't escape being part of Australia's history' issuing stamps commemorating Colin Defries, Houdini and John Duigan, crediting only Defries and Duigan with historical firsts.
The owner of the aircraft, Lawrence Adamson, "dumped it at sea" in order to avoid paying customs duties. Most of the plane was lost, although the engine and two propellers were later salvaged. The engine now belongs to Museum Victoria, where it is regarded by the curator, David Crotty, as "one of the most significant aeronautical artefacts" in the collection.