09 May 1949 : Birth of Oleg Yur'yevich At'kov, Soviet Medical Doctor and Cosmonaut.
09 May 1949 : First flight of the Republic XF-91 Thunderceptor, an American mixed-propulsion interceptor using a jet engine for most flight, and a cluster of four small rocket engines for added thrust during climb and interception.
09 May 1948 : First flight of the Aeronova A. E. R.1, Italian road-able monoplane.
09 May 1947 : First flight of the Percival Merganser, British light civil transport twin-engine, high-wing monoplane of all-metal, stressed skin construction with retractable tricycle undercarriage.
09 May 1945 : British Pacific Fleet carrier aircraft strike the Sakishima Gunto. Kamikazes hit the aircraft carriers HMS Formidable and HMS Victorious.
09 May 1943 : A German night fighter crew defects to the United Kingdom, flying a Junkers Ju 88R-1 there. The defection gives British scientists and tacticians access to a Lichtenstein airborne interception radar for the first time.
09 May 1942 : Operation Bowery, 64 Supermarine Spitfires are flown to Malta from the US aircraft carrier USS Wasp and the Royal Navy carrier HMS Eagle.
09 May 1942 : Chief of Staff of the United States Army General George C. Marshall proposes the creation of an organization within the U.S. Army Air Forces similar to the Royal Air Force’s Coastal Command. His proposal eventually will lead to the establishment of the Army Air Forces Antisubmarine Command.
09 May 1941 : Death of Sydney "Timbertoes" Carlin, British WWI flying ace and air gunner during WWII, dying from wounds after an enemy bombing raid at RAF Wittering.
09 May 1940 : First flight of the second prototype of the Mikoyan-Gurevich MiG-1, Soviet fighter aircraft.
09 May 1937 : First flight of the Lockheed XC-35, American twin-engine, experimental pressurized airplane, first American aircraft to feature cabin pressurization. It was initially described as a 'supercharged cabin' by the Army, development of the Lockheed Model 10 Electra.
09 May 1937 : Death of Walter Mittelholzer, Swiss aviation pioneer, pilot, photographer, travel writer, and also as one of the first aviation entrepreneurs.
09 May 1936 : The German airship Hindenburg lands at Lakehurst, New Jersey after its first scheduled transatlantic flight.
09 May 1934 : First flight of the de Havilland Hornet Moth, a single-engined cabin biplane designed by the de Havilland Aircraft Company as a potential replacement for its highly successful de Havilland Tiger Moth trainer.
09 May 1934 : An Air France Wibault 282 T-12 airliner crashes into the English Channel off Dungeness, Kent, England, killing all six people on board.