How do Aeroplanes fly?

[YakQueudrue]

I didn't manipulate anything....he didn't edit his post afterwards at all.

 

Precisely.

[YakQueudrue]

OK this whole thing is getting a bit confusing now.....

[KenH]

If you look at the cross-section of a wing, the air has further to travel over the top of the wing than the bottom. The difference in air pressure on each surface in turn creates lift and holds the plane in the air.

 

 

If this was true then you wouldn't be able to fly unless you have a wing with a flat bottom and a rounded top. Paper aeroplanes do not have this shape and yet they fly just fine.

[littlebasher]

If this was true then you wouldn't be able to fly unless you have a wing with a flat bottom and a rounded top. Paper aeroplanes do not have this shape and yet they fly just fine.

 

Paper aeroplanes dont generate lift, they merely glide.

 

In aviation however, the air traveling around an aircraft wing goes faster over the top of the wing (creating low pressure) and slower over the bottom (creating high pressure).

 

The differential pressure combined with the reaction force of the deflection (Newton's first law of motion), generates lift.

 

Enjoy

 

Professor Ming

[Cyclone]

If you look at the cross-section of a wing, the air has further to travel over the top of the wing than the bottom. The difference in air pressure on each surface in turn creates lift and holds the plane in the air.

 

Have you ever put your hand out of the window while driving down the motorway? If you lay it flat you can feel the air flow holding it steady, but if you angle you hand upwards you can feel the air pressure on the underside of your hand force it upwards, likewise if you angle it downwards, the air pressure forces it down. It's exactly the same principle.

 

Oops. Edited.

 

That's not the same principle at all, you don't have to have an inclined wing in order to fly, your hand isn't an aerofoil so it can't generate lift, hence you have to incline it.

[KenH]

Paper aeroplanes dont generate lift, they merely glide.

 

That would mean that you couldn't get a paper aeroplane to climb, but you can if you throw it fast enough.

[crookes]

If you look at the cross-section of a wing, the air has further to travel over the top of the wing than the bottom. The difference in air pressure on each surface in turn creates lift and holds the plane in the air.

 

However, the cross section has since been found nothing to do with it. There was a programme about it on TV. I can't for the life of me remember what the conclusion was.

[KenH]

However, the cross section has since been found nothing to do with it. There was a programme about it on TV. I can't for the life of me remember what the conclusion was.

 

If it was true then you wouldn't be able to fly upside down.

[matsalleh]

They don't always go up,but they always come down.

How's that work then?

[artisan]

What happens is, is that the noise of the engines hurts the Earths ears, so it moves away from them. This gives the impression that the aeroplane is flying. This is why aeroplanes with noisyier engines are always higher up, be cause the Earth has moved further away.

All this is explained in ancient religious texts, handed down in a cave to the medeaval aircraft engineers from God.