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. Remember these designs are basic designs that you can modify easily to make more complex.The same principles that held for actual airplanes also apply to paper airplanes. Copy paper (8 ½ x 11 inches or size A4).The only item needed for this project is: Each design affects the airplane’s distance, time aloft, and acrobatics. In this project we will be looking at 4 simple ways to make a paper airplane. Some paper airplanes can go longer distances, can stay aloft longer, or can even do tricks. When the forward motion is enough to produce a force of Lift that is greater than the Weight, the airplane moves upward. When the Thrust produced by the engine (or you!) is greater than the force of Drag, the airplane moves forward. You will feel the effect of this force if you jump up from the floor. Weight is the force created by the pull of gravity toward the center of the earth. Swish your hand rapidly side-to-side and you will feel that resistance.
In the case of paper airplanes, you are the engine thrusting the paper airplane through the air.ĭrag is the force produced by the resistance of the air to the forward motion of the airplane. This motion is produced by the Thrust of the engine. Lift is generated by the forward motion of the airplane through the air. Airplanes fly because they can generate a force called Lift which normally moves the airplane upward.
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