How many twists and turns have human beings experienced in sending planes into the sky?

1804, Sir Kelly of Britain (1773- 1857) was the first to design and test an airplane in a planned way. He designed and tested gliders at 1809 for short-distance gliding flight, and he gave one of them to a passenger. He thinks that the wing can generate lift, and the air propeller is an ideal propeller. It is suggested to use rudder and elevator. But due to the lack of an engine that can provide continuous power, he finally failed to get what he wanted.

Starting from 1842, Stirling Ferro (1799- 1883) and Henson (1805- 1885) in Britain began to develop steam-powered aircraft models. 1848, he built a model with a total mass of 4.5 kg and flew 40 meters.

1870, a model plane was designed by the Frenchman Peno (1850- 1880). The next year, he designed a model of a monoplane with a stable tail and the above-mentioned power device, which can fly 60 meters.

188 1 year, Mozhaiski (1825- 1890), a Russian technician and naval officer, obtained a patent for a three-propeller aircraft model driven by a spring mechanism after years of experiments.

1889, Lilienthal, a pioneer of German aviation (1848- 1896) published the book "Bird's flight is the basis of flight skills". Two years later, Lilienthal completed the first short gliding flight. 1893, the two brothers obtained the patent of monoplane; They also made many gliding flights on artificially piled mountains, up to 300 meters as far as possible.

1900, British technician Maxim (1840- 19 16) used his own designed sightseeing plane to test flight. Although unsuccessful, he corrected some mistakes made by his predecessors.

1October 7th, samuel langley (S. P .Langley), taking a plane driven by a gasoline internal combustion engine designed by himself from 1898, took off from the catapult group of the Potomac River in the United States and fell into the water because the starter got stuck. However, he used gasoline engine instead of steam engine as the power of the plane, which was a great progress. After his power plane test failed, The New York Times put forward "advice": "We don't want Professor Langley to continue to spend time and money on aircraft testing, which will hurt their great image as scientists."

Dramatically, just after 7 1 day, 1903, 17 and 10: 30, the American pilots Wright brothers who kept in touch with samuel langley and engaged in aircraft research successfully piloted the "Flyer 1" plane and made the first flight of mankind.