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22nd of May 1906

The patent US821393A is granted, the application for the patent was filed by Mr O Wright and Mr W. Wright. on the 23rd of March 1903. 270 days before the first flight at Kity Hawk the design of the Wright Flyer is entered at the US Patent office as a "Flying Machine".

The Wright Flyer as shown in the patent, click on the picture to get access to the patent

The Wright Flyer had three instruments onboard during its flight on the 17th of December 1903. A Veedor engine revolution recorder measured the number of propeller turns. A stopwatch recorded the flight time, while a Richard hand anemometer, attached to the front centre strut, recorded the distance covered in meters. It made a total of four flights on that famous date.

  1. 120 ft in 12 seconds

  2. 175 ft in 12 seconds

  3. 200 ft in 15 seconds

  4. 852 ft in 59 seconds

The fourth flight's landing broke the front elevator supports, which the Wrights hoped to repair for a possible four-mile (6 km) flight to Kitty Hawk village. Soon after, a heavy gust picked up the Flyer and tumbled it end over end, damaging it beyond any hope of quick repair. It never flew again The Wright Flyer was put on display in the Arts and Industries Building of the Smithsonian on December 17, 1948

Some specifications of the Wright Flyer:

  • Length: 21 ft 1 in (6.43 m)

  • Wingspan: 40 ft 4 in (12.29 m)

  • Height: 9 ft 0 in (2.74 m)

  • Wing area: 510 sq ft (47 m2)

  • Empty weight: 605 lb (274 kg)

  • Max takeoff weight: 745 lb (338 kg)

  • Powerplant: 1 × straight-4 water-cooled piston engine, 4 inches (102 mm) bore by 4 inches (102 mm) stroke.[3] , 12 hp (8.9 kW) 170 lbs (77.11 kg), (2 x Wright "Elliptical" props, 8 ft 6 in (2.59 m), port prop carved to counter-rotate left, starboard prop carved to rotate to the right)

  • Maximum speed: 30 mph (48 km/h, 26 kn)

  • Service ceiling: 30 ft (9.1 m)

  • Wing loading: 1.4 lb/sq ft (6.4 kg/m2)

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