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The History Of Planes Have you ever wondered who was the first person to make a flying machine It was not the Wright brother If you want to know just keep reading more about the history of the planes and how it evolved The Reason Planes Fly Whenever I see a plane the first question that comes to mind is What is causing that thing to stay off of the ground Well I finally discovered the answer When a plane flies there are four forces at work that keep the plane flying These forces are lift thrust gravity and drag Lift Pressure Airplane wings are created with a special design called an airfoil The airfoil design bulges out more on the top than on the bottom This causes the air that hits the wing to go off into two different streams one that goes over the top and one that goes under and they both meet up in the back The air moving over the top of the wing is caused to go faster than the slower moving air on the bottom Faster moving air has less pressure so this causes the pressure on the bottom of the wing to be greater and the plane is lifted This effect is known as the Bernoulli Principle This principle was developed by Daniel Bernoulli who was a Swiss mathematician and physician He developed the principle in the 18th century When a plane creates lift it overcomes the force of gravity that is pulling the plane down Air pressure plays a big part in flight also When you think about flight you have to realize that air pressure is a force pushing on every square inch of an airplane When a plane is parked the air pressure is distributed evenly around the planes surface When
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