Traditional Culture Encyclopedia - Traditional festivals - Folding method of the strongest sliding paper plane
Folding method of the strongest sliding paper plane
1. First, prepare a rectangular colored paper.
2. Fold the two top corners on the same side in half along the center line, and the other two top corners are also folded into triangles.
3. Fold along the center line.
4. Fold the top corner to the center point.
5. The prototype of the paper plane came out.
6. Finally, gently pull down its wings, and the gliding paper plane is ready. Let's do it together!
Basic principles of gliders:
Aircraft must overcome gravity with lift and air resistance with thrust to fly. The lift force is mainly generated by the pressure difference between the upper and lower surfaces of the wing. The airfoil (wing cross section) of subsonic aircraft is almost symmetrical up and down to reduce the drag, while the airfoil of glider usually adopts Clark Y-like airfoil (typically convex on the top and flat on the bottom), which can make unpowered glider produce greater lift, increase the lift-drag ratio and prolong the air stay time.
Gliders have no engine power. It can take off in four ways:
1) Ejection-Put the glider on the elastic rope and pull it back. After the driver gave the signal, he released the rope and ejected.
2) Car towing: Tie the glider to the car, and after towing to a proper height, the driver will loosen the rope.
3) winch traction-similar to car traction, except that a motor-driven winch fixed on the ground is used to pull the glider.
4) Aircraft towing-After the powered aircraft is towed to a certain height, the glider will be detached and fly freely.
After the glider takes off, unless it encounters updraft, the air resistance will gradually slow down the speed of the plane and the lift will become smaller and smaller. When gravity is greater than lift, the plane will fly lower and lower and finally land on the ground. In order to make the glider fly far and far, it must have a high lift-drag ratio, which is why the glider's wings are so slender. How to break the record of flight time and altitude is the biggest challenge in the design and manufacture of gliders. Gliding is a sport that requires high skills and flight knowledge, and it travels through the sky with the help of natural energy.
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