How does a plane stop?

Question

How does a plane stop after landing? does it have brakes? why do we hear a roaring sound after the plane lands ! ?

Answer 1

A small plane will stop by using brakes and aerodynamic breaking by keeping the controls back which keeps the elevator up and slows the plane down. On a turboprop plane they are able to change the pitch of the propeller blades to create reverst thrust A jet will use both these methods but also what's called reverse thrust. When using reverse thrust the engines do not actually change direction of their spin, rather they have peices of metal that come back to deflect the thrust forward. That is the roaring noise you hear on landing. I have included a video of a plane landing and deploying reverse thrust which you can see when they get just past the first red light. It's a big shiny peice of metal that comes down and one that comes up, otherwise known as a "clam shell" reverse thrust. The reason it gets so loud is because it's like standing behind jet engines because all that noise it deflected forward, where you are sitting. However the thrust reversers are said to only help out about approximately 10% of braking.

Answer 2

To understand how a plane lands, you need to understand how a big chunk of metal can fly through the air. The top of an airplane wing is curved and the bottom is flat. When the air flows over the top, the gravity push on the wing is less than underneath the wing, hence the uplift, which causes the plane to fly.

This alone does not make a plane fly. Speed from the jet engines allows this uplift to "push" the airplane off the ground.

When the plane lands, the speed is decreased, which reduces the uplift and allows the plane to slowly descend. As the plane comes closer the ground, the flaps of the airplane our released which create drag, thus slowling the plane as it makes it approach.

Once the landing gear is deployed and the plane safety lands on the tarmac, the pilot hits the brake and the plane steadily comes to a landing speed.

Next time you fly, choose a seat their the wing and you can watch this happen as the plane takes off and lands. Hope this helps!

Answer 3

Of course it has brakes....how else could it stop?
I think maybe the "roaring sound" your speaking of is the reverse thrusters kicking in.
But without brakes, you're going off the end of the runway.

Answer 4

Thats the engine changing the direction of spin. They also direct the wingflaps to face the plane downward to create a downward force. and they do have breaks aswell

Answer 5

depending on which plane you are talking about.
I am assuming you are talking about a jet liner.
They have directional foils that direct the jet wash forward to slow the jet after it touches down on the flight line.
After it slows to a manageable speed the pilot can use the wheel brakes.
Hope that helps.

Answer 6

Brakes..
Wing Flaps..
Reverse engine thrusters..
Sand pit & fence at end of runway..

Answer 7

Brakes, and reverse thrust.