How does an aeroplane goes up?

Question

How does an aeroplane goes up?

Answer 1

We've pretty well covered lift, but we also need thrust (power) in excess of that needed for level flight.  Yes, I know gliders have no thrust available but we're discussing airplanes here.

Answer 2

Let us look at the cross section of an airfoil...

http://www.ae.uiuc.edu/m-selig/ads/afplo...

What is happening is as an airplane moves forward, the particle of air are pushed up due to the shape of the airfoil.  The bottom of the wing is usually flat to allow the air to pass by uneffected.  Anyways, the maximum thickness occurs around the 25% chord.  So, the air particles are pushed up.  This process creates a vacuum on the rest of the airfoil so basically the airplace is riding on a vacuum.  Then as the airfoil starts to taper back towards the tail the airparticles that were pushed out of the way rush back in to fill the void and that is what creates the downwash as one of the previous answerers had described.  As the particles hit the airfoil to be deflected out of the way, their horizontal momentum is transfered into the plane and that is one of the factors that causes drag.  I would love to go into more detail, but that is the jist of what is occurring.

Answer 3

The wings lift the aircraft.  As long as the wings are moving forward through the air and are tilted upward so that the edge facing into the wind is higher than the edge facing away from the wind, the wings will produce lift.  

As the wings move forward through the air, they pull the air above them downwards, creating a large swath of downward-moving air called a downwash that (in theory) extends all the way back to the airport from which the airplane took off (usually wind breaks up the downwash, though, after the plane has moved on).  The downwash drifts downward until it reaches the ground.  Sometimes, if weather conditions are just right, you can actually see the downwash moving downwards behind the plane.

A lot of force is exerted by the wings to push the downwash towards the ground.  This creates an equal and opposite force that pushes the wings up.  That force is called lift.  If the lifting force generated by the wings is greater than the weight of the aircraft, it flies. Of course, in normal flight, the pilots adjust the speed and attitude of the airplane so that the lift from the wings is just enough to keep the airplane flying level, neither climbing nor descending.

Answer 4

Just to add to the excellent answer from airbrnrngr1087:

The upper side of the wing has more curve that the lower. It means that air has to travel a longer distance over it than under. As a result, the air pressure is lower over the wing than under. So, one could say, in a melodramatic way, that what makes an aeroplane to go up is that it is 'sucked' upward.

Answer 5

It creates lift.  When an airplane flies, it has four forces acting on it.  

Weight (a result of gravity)

Lift

Drag

Thrust

An airplane uses its wings (curved surfaces that create a pressure differential) to create an upward force to overcome the force of weight.

An airplane has at least one engine to propel itself forward.  This forward motion creates airflow over the wings, which allows the wing to create lift.

Drag will result due to the presence of the airplane in free-flowing air, and also as a result of the production of lift.  This drag must be overcome by thrust to accelerate.

Answer 6

All good answers so far. However lets not forget another important factor==Money!!

Answer 7

its engines, wings, tails and pilots!lol