Wilbur (1867-1912) and Orville Wright (1871-1948) had operated a bicycle shop in Dayton, Ohio, since 1892. They had become interested in human flight after the 1896 death of the German glider pioneer Otto Lilienthal. From 1899 onwards they conducted systematic aerodynamic research — building wind tunnels, testing wing-shape variations, and developing the first practical theory of three-axis control (pitch, roll, yaw) for aircraft.
They had flown three glider prototypes at Kitty Hawk, North Carolina, across 1900-1902 — choosing the coastal location for its steady wind, soft sand for safe landings, and relative isolation that protected their research from competitive observation. The 1902 glider had logged approximately 1,000 flights and had conclusively demonstrated the Wrights’ three-axis control system.
The step to powered flight required two additional innovations: a lightweight engine and efficient propellers. The Wrights designed both themselves. The Wright Flyer engine was a 12-horsepower, 78 kg, four-cylinder gasoline engine built by mechanic Charlie Taylor in the Dayton workshop. The twin propellers were laminated spruce, designed using the Wrights’ wind-tunnel data, producing measured efficiency of approximately 66 percent — competitive with 21st-century propeller designs.
The complete Wright Flyer weighed 274 kg empty.
17 December 1903
The Wrights had assembled the Flyer at Kill Devil Hills (approximately 6 km south of Kitty Hawk village) across October-November 1903. A 14 December test failed when Wilbur over-corrected on takeoff and stalled the Flyer back into the sand.
The 17 December test began at approximately 10:35 a.m. The wind was blowing approximately 43 km/h from the north — cold and above their preferred conditions but the brothers concluded that further delay was undesirable. Five local witnesses assisted: lifesaving station crew members John T. Daniels, Adam Etheridge, Will Dough, plus local businessman W. C. Brinkley and 17-year-old Johnny Moore.
Orville was at the controls for the first flight. He lay prone on the lower wing, controlling the wing-warping with hip movements and the elevator with hand levers. Wilbur ran alongside the right wingtip steadying it. Daniels operated the camera that took the canonical photograph of the first flight.
The Flyer lifted off the launching rail at approximately 10:35 a.m. It flew approximately 36 metres (120 feet) across 12 seconds at an altitude of approximately 3 metres before landing in the sand.
It was the first sustained, powered, controlled flight of a heavier-than-air aircraft in human history.
Three more flights
The brothers made three more flights on the morning of 17 December 1903, alternating pilot duty: