How Do Aeroplanes Fly
Planes are really helpful they help humans get from one side of the earth to the other side. It comes in different shapes and sizes. There are four different forces, lift, thrust, drag and weight. American aviation pioneers Orville and Wilbur Wright (The Wright Brothers) created the first successful airplane.
When the plane's propellers spin it gives the aeroplane a forward force called thrust. Thrust is generated from an engine attached to the wings. Thrust is used to overcome the drag of a plane it.
Drag is is generated from every part of a plane, even the engine. It is the force that goes to the opposite direction of the motion. Drag is caused by friction and differences in air pressure. When an airplane is flying straight and at an even speed, the thrust it produces balances its drag.
Lift is the force that holds an airplane in the air. The wings create most of the lift used by airplanes. As a plane moves forward, its lift force increases until it equals its weight. When lift equals weight, the plane can fly.
Weight is the force caused by gravity. Weight and lift are equal when a plane flies. Because weight requires more lift, and therefore more thrust, heavy planes are more difficult to get off the ground as compared to lighter planes. Planes with less weight requires less thrust.
Planes are designed to be as light as possible. Each force has an opposite force that works against it. Lift works opposite of weight. Thrust works opposite of drag. When the forces are balanced, a plane flies in a level direction. We are lucky that we have seat belts for safety and if we did not have safety we fall off our seat and hurt ourselves when where landing or taking off.
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