The development of aviation has allowed safe travel – the airplane It is the means of transport with fewer accidents – and much faster than with any other means.
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The distances between countries and continents they have become shorter in terms of time, resulting in a more interrelated world.
But how can such a heavy device stay in the air?
The airplane It is sustained in the air thanks, on the one hand, to the great speed at which it moves and, on the other, to the profile of its wings, which are curved above and flat below.
The air takes longer to pass over the top of the wing, since the curvature increases its surface, and this causes it to accelerate and produce a pressure difference between the air above and below it.
Four forces act on an airplane in flight: lift, weight, thrust, and drag.
The difference between both pressures, low above and high below, maintains the airplane in the air. Therefore, a airplane it cannot sustain itself without moving, and therefore to take off it needs to accelerate until the force of lift, created by the difference in pressure, is greater than its weight.
Thus, a Jumbo Boeing 747, with about 500 passengers and a total weight of 350 tons, needs to reach 290 km/h to start takeoff.
The first plane and the first flight
* The design of the first airplane was made by the American brothers Wilbur and Orville Wright. In 1903, after several tests, they carried out the first powered flight in history. The plane flew 24 meters, almost at ground level, for 12 seconds.
The American brothers Wilbur and Orville Wright designed the first airplane and made the first flight in history.
TAKE NOTE…
* With the wings curved above and flat below, the lift force pushes the plane up and overcomes the force of gravity.
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