Also known as airplanes, they are machines with two horizontal wings and a motor, used for military purposes or for recreative ones, such as a trip or journey to another country. They move in a three dimensions so, when flying one of them, the pilot has to take into account three different axis, each in charge of a different movements: left/right, up/down or right/left wing up. The first motor plane was invented by the Wright Brothers in the 20th century and it received the name of the Flyer I.
Nowadays, airplanes have evolved and they no longer are those machines with an helix. Instead, they now have a propulsión system wich allows them to move faster. Because of the speed they move with and the consequences that any imperfection can cause, they are always subjected to a vigoruous inspections in all of their components and different movements. In this way, we can see how safety is a very important factor to take into account.
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