This allows skilled pilots to take advantage of updrafts and stay in the air almost indefinitely. That is it can fly more than forty meters horizontally for each meter of altitude it falls. Today’s actual glider’s have glide ratios exceeding forty. Planes with high wing loads glide faster so that their rate of descent is high. A heavy plane with small wings will have a large wing load. The weight of the whole plane divided by the surface area of the main wing is called the wing loading. For paper airplanes, a 5 degree or 6 degree angle of attack is best. The lift/drag ratio changes with the glider’s angle of attack. It is more important to build a light and sturdy main wing with an aspect ratio of about five or six. Ninomiya, it is not necessary to build the wing too slender. On a paper airplane, however, the body of the plane is small, the weight is light and the speed is slow. The more slender the wing the higher the aspect ratio will be. The aspect ratio is found by dividing the wing span by the chord length. A term that is used when discussing drag on a wing is aspect ratio. The plane then has less friction as it passes through the air.įor a glider, a slender wing is preferred. This decreases the amount of air which sticks to the surface of the plane. This can be done by making the surfaces of the plane as smooth as possible. It is very important to decrease the drag on the airplane. The amount of camber should be no more than six percent of the chord length. A good way to do this is to make the wing with a slight bend or camber. The glide ratio has the same value as the lift ratio.Ī good wing shape is necessary to have a high lift/drag ratio.
The glide ratio is the distance a plane will glide divided by its altitude. A plane that flies well will have a high lift/drag ratio. The ratio of these forces is called the lift/drag ratio. It has a vertical component, lift, and a horizontal component, drag. This force can be thought of as a vector.
When a plane is gliding, wind pressure acts against the wing. The angle of attack changes as the nose of the plane raises or lowers. The angle that the chord line makes with the wind direction is called the angle of attack. A chord line is a straight line drawn from the leading edge of the wing to the trailing edge of the wing. The shape of the wing’s cross section is called an airfoil.
It has to support the plane during flight. The most important part of a glider is the main wing. It must be able to glide well and it must have good stability. There are two conditions necessary to make a paper airplane that flies well. The same principles that held for actual airplanes also apply to paper airplanes.
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