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Paper plane

Paper plane, paper plane (UK), paper plane (US), paper glider, dart or dart are toy planes, usually made of folded paper or cardboard.

The origin of origami glider is generally considered to be ancient Chinese, although there is sufficient evidence to show that the improvement and development of origami glider are the same in Japan. Of course, in 500 BC, China began large-scale paper production, and origami and origami began to be popular in about a century (460-390 BC). The location and form of the first paper plane, or even the form of the first paper plane, could not be determined.

For more than a thousand years since then, paper aircraft has been the dominant man-made aircraft over aviation, its principle is easy to understand, although it does not perform well in long-distance taxiing due to its high drag coefficient. The pioneers of power flight have studied paper model aircraft to design larger machines. Da Vinci wrote that he made airplane models out of parchment and tested some of his early bird helicopters, flying by flapping wings and parachute designs using paper models. Since then, Sir George Cayley has explored the performance of gliders in the late 19th century. Other pioneers, such as Clement ad (CL? Professor Charles Langley and Alberto Santos Dumont often test ideas on paper and light wood models to confirm their theories on scale and then put them into practice.

The most important use of paper aircraft models in aircraft design was between 1899 and 1903 for the Wright brothers, which was the date of the first power flight from Kill Devil Hills designed by Wright flyers. The Wright used wind tunnels to learn about the forces that can be used to control aircraft in flight. They built many paper models and tested them in wind tunnels. By observing the forces generated by bending the thick paper model in the wind tunnel, the Wright and his wife determined that the flight surface controlled by warping would be the most effective, and its effect would be the same as the later hinged aileron and elevator surfaces used today. Their paper models are important in the gradual transition to larger models, kites, gliders, and ultimately to power flywheels (developed with light gasoline engines). In this way, paper model aircraft is still the key to the graduation process from model to manned heavier than air flight.

With the passage of time, many other designers have improved and developed paper models and used them as fundamental and useful tools in aircraft design. One of the earliest known modern paper airplanes, such as in composite structures and many other aerodynamic improvements, was in 1909.

The paper plane built by Ludwig Prandtl at the 1924 banquet of the International Federation of theoretical and applied mechanics was built by Theodore von K? rm? n) Cancel as unskilled:

Prandtl was also impulsive. I remember a dignified dinner after a conference in Delft, the Netherlands, where my sister sat at the table and asked him a question about the mechanism of flight. He began to explain; in the process, he picked up the paper menu and designed a small model airplane, but did not think where he was. It landed in front of the shirt of the French Minister of education, embarrassing my sister and others at the party.

In 1930, Jack Northrop (co-founder of Lockheed) used paper airplanes as test models for large airplanes. In Germany, during the great depression, designers of Heinkel and junkers used paper models to establish basic performance and structural forms for important projects, such as Heinkel 111 and junkers 88 tactical bomber programs.

In recent years, the paper model aircraft has become very complex, and the very high flight performance has been far away from the origin of origami, but over the years, even the origami aircraft has obtained many novel and exciting designs, and also made a lot of progress in flight performance.

In the following years, many design improvements have been made, including speed, lift, propulsion, style and fashion.