1695 - Birth of Henri Pitot, French hydraulic engineer and the inventor of the Pitot tube.
1812 - Birth of William Samuel Henson , pre-Wright brothers aviation engineer and inventor.
1866 - Birth of Richard von Kehler, German Balloon pioneer.
1891 - Birth of William Graham Westwood, South african WWI flying ace
1896 - Birth of Karl Allmenröder,German WWI flying ace.
1896 - Birth of Louis Marcel Germain 'Marcel' Doret, French Aerobatic, Record breaker and test pilot.
1896 - Birth of Richard Alexander "Alex" Hewat, American WWI flying ace.
1899 - Birth of Gordon Frank Mason 'Mable' Apps, British WWI flying ace, who turned to Canada post war, joining the nascent Royal Canadian Air Force where He performed pioneering aerial photography survey work for the RCAF.
1918 - Death of Omer Paul Demeuldre, French WWI flying ace, Killed in action in his Spad.
1918 - Death of Samuel Parry, Welsh WWI flying ace, killed in a flying accident in a Bristol F.2b.
1923 - The Sikorsky Aero Engineering Corporation is formed by Igor Sikorsky at a Long Island chicken farm.
1923 – U.S. Air Service Fokker T-2 pilots Lts. Oakley G. Kelly and John A. Macready complete the 1st non-stop flight across the United States in 26 hours, 50 minutes, 38.4 seconds from Roosevelt Field, Long Island to Wickenburg, Arizona.
1924 - Birth of Robert Kenneth "Ken" Tyrrell, British WWII flying mechanic, Formula 2 racing driver and founder of the Tyrrell Formula One constructor
1926 - Birth of Georgi Konstantinowitsch Mossolow, Soviet test Pilot.
1928 - USN LT’s Arthur Gavin and Zeus Soucek, takes off in a PN-12 seaplane for a world duration record for Class C seaplanes.
1933 - 1st flight of The experimental Hawker High Speed Fury, evolution of the British biplane fighter.
1937 - Death of Cosimo Rennella, Italian born Ecuadorian WWI flying ace, and pioneering aviator in south america Pre and post WWI war.
1940 - 1st flight of the Arsenal VG-39, French light fighter aircraft prototype developped from the VG-33.
1943 - Death of Frank Maxwell Andrews , general officer in the US Army and one of the founding fathers of the USAF, in the crash of the B-24D-1-CO Liberator, 41-23728, of the 8th Air Force out of RAF Bovingdon, England, on Mt. Fagradalsfjall on the Reykjanes peninsula after an aborted attempt to land at the Royal Air Force station at Kaldadarnes, Iceland.
1943 - 1st flight of the Curtiss-Wright C-76 Caravan, American all-wood twin engined military transport aircraft.
1945 – World War II: Sinking of the prison ships Cap Arcona, Thielbek and Deutschland by Typhoons of the Royal Air Force in Lübeck Bay.
1948 - Death of Howard Clifton 'Tick' Lilly, American test pilot, killed on takeoff crash due to compressor disintegration in the crash of the 2nd prototype Douglas D-558-1 Skystreak.
1949 - 1st launch, of Viking 1.( Viking Rocket) It attained an altitude of 50 miles (80 km). The altitude was limited by a premature engine cut-off, eventually traced to steam leakage from the turbine casing.
1949 - Birth of Albert Sacco, Jr.,American chemical engineer who flew as a Payload Specialist on the Space Shuttle Columbia on shuttle mission STS-73 in 1995.
1950 - The 2nd prototype Blackburn B-54 Y.A.8. with a crew of three makes his 1st flight.
1950 - HMS Ark Royal (R09) is Launched at Birkenhead. Audacious-class aircraft carrier, Royal navy's last remaining conventional catapult and arrested-landing aircraft carrier and world's 1st aircraft carrier to be commissioned with an angled flight deck.
1952 – Lieutenant Colonels Joseph O. Fletcher and William P. Benedict of the United States perform the 1st landing with a C-47 aircraft at the North Pole.
1955 - The 1st pre-series Sud-Ouest SO 9050 Trident II was flown .
1957 - 1st flight of the SNCASO SO-9050 'Trident' III, evolution of the mixed power French prototype interceptor aircraft.
1957 - Death of John Jay Hopkins, founder and president of General Dynamics.
1963 - 1st flight of the production form Piper PA-30 Twin Comanche.
1968 - Death of Bernard Artigau, French WWI flying ace, pioneering commercial pilot who also served in WWII
1968 - Braniff Flight 352 Lockheed Electra II, registration number N9707C crashed in Dawson, Texas, after it broke up in mid-air in a thunderstorm, killing all 85.
1976 - A Pan Am Boeing 747SP makes a record around-the-world flight, taking 1 day 22 hours. The flight left New York-JFK on May 1, and returned on May 3. The flight made only two stopovers during the journey, one in New Delhi and the other in Tokyo-Haneda, where a two-hour delay was made because of a strike among the airport workers
1977 - 1st flight of the Bell XV-15,American tiltrotor VTOL aircraft, 2nd successful experimental tiltrotor aircraft and 1st to demonstrate the concept's high speed performance relative to conventional helicopters.
1982 - A Gulfstream II from algerian government is shot down above the border between Iran and Turkey. Both Iran and Iraq rejected responsibility.
1983 - 1st CC 134 Challenger Jet was delivered to RCAF 412 Squadron.
1985 - While descending to Lviv, Ukraine, Aeroflot Flight 8381 Tupolev Tu-134 collided with a Soviet Air Force Antonov An-26 which had just took off, in overcast weather, killing all 94 on both planes.
1986 - 20 passengers die after an explosion caused by Tamil Tigers separatists aboard a Air Lanka Lockheed L-1011
1991 - 1st flight of the Dassault Mirage F1-CT, ground attack version of the french Mirage F1C-200 air-superiority fighter and attack aircraft.
1998 - STS-90, Space Shuttle Columbia mission is back on earth
2002 – A military MiG-21 aircraft crashes into the Bank of Rajasthan in India, killing eight.
2005 - Airwork Flight 23 Fairchild SA227-AC Metro III, New Zealand Post cargo flight disintegrated due to Autopilot Overload.
2006 - Armavia Flight 967, Aibus A320-211 crashed into the sea while attempting to conduct a go-around following its 1st approach to Sochi airport.
2007 - Death of Walter Marty Schirra, Jr. , American test pilot, US Navy officer, and one of the original Mercury 7 astronauts chosen for the Project Mercury. He is the only person to fly in all of America's first three space programs (Mercury, Gemini and Apollo), fifth American and the ninth human to ride a rocket into space. He was the 1st person to go into space three times.
2009 - A Fuerzas Terrestres Venezuela Mil Mi-17 Hip helicopter crashes on a border patrol with Colombia with 18 fatalities including the Venezuelan General Domingo Faneite. The accident occurred near the town of El Alto de Rubio, in Táchira state, Venezuela.
2010 - Death of Günter F. Wendt,German-American engineer noted for his work in the U.S. manned spaceflight program. "There is no reason to say I am narrow-minded. Just do it my way and you will have no problem at all."
2013 - Solar Impulse, Swiss long-range solar powered aircraft, takes off from Moffet Airfield, California for a flight across the US to New York City, via Phoenix (Arizona), Dallas (Texas), Saint Louis (Missouri) and Washington D.C.