Planes use flaps to land and to take off. So why do they retract them while they are on the ground, ie why not just leave them deployed?
In: Engineering
Seems like no one actually can explain Flaps that well. As a pilot we use flaps for takeoff because it increases our lift on the ground.
In the air, flaps produce a lot of drag. You retract them to reduce drag and go faster.
When you’re on approach, you put the flaps down to slow you down. It gets the airplane slower. And it helps significantly on reducing your landing distance since it’s a lot of drag.
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