[Science Question] Will a plane take off?

That's bollocks. Why is everyone still arguing. There would be no air moving under the wings, therefore there would be no lift.

It doesn't matter how much thrust is created by the jets. I think it's better to think of it as a 'rolling road' rather than a conveyor belt, cos it seems to be confusing some people.

No matter how much thrust there is, the plane will not be moving forward, so no lift is created.

That's more of a catapult than a conveyor belt innit?

I am taking the piss, my point was that if this convey belt idea worked, then this kid has just solved the biggest problem in aviation!!!!!!!!!

THE NEED FOR FUCKING LONG RUNWAYS!!!

the wheels dont propell the force forward mate.

You're confusing a car with an aeroplane (easy mistake ), the wheels are free spinning, they're not a driving force (great pun )... You can prove this by taking a model plane and pushing it slowly along a conveyor belt that is moving faster than you're pushing your toy.... The plane will move forward... try it.

haha just googled it.

http://videos.streetfire.net/player.aspx?fileid=35E964D9-38DB-4EFD-BE8D-D6BA1A43A06B

OWNED!!!!!

Thats hilarious!best plane ever that

that is the worst attempt at a controlled experiment ever! lol.

proves my point though

its the thrust of the planes engines that drives the plane forward - not the wheels...

I'm having a hard time getting my head around this. I'm assuming that no matter how powerful the thrust of the engines is, the plane has to move on it's wheels until there is enough lift to outweigh the force of gravity and if the conveyor is set to always match that speed in the opposite direction, the plane can't move forward.

Confusing isn't it

It's doing my head in now

The plane still moves forwards as if there were no conveyor belt there.

The wheels will spin faster than the conveyor belt (but the plane will be moving at the same speed), the plane could even move slower than the conveyor belt and it would still take off.

The conveyor belt will cause a little friction but that is all.

I think i understand, but my original belief that a plane wouldn't move along the conveyor is still battling it out.

---

It's the fact that the conveyor is set to ALWAYS match the speed of the wheels that gets me.

I don't think the plane would take off, as it's relative airspeed is zero (it is not moving relative to the air around it). The whole wheel/jet engine/conveyor belt thing is just there to confuse.

The faster the speed the plane moves along the ground, the faster the air speed (passing over and under the wings) and thus the greater the lift until a point where the force of lift exceeds the aeroplanes weight and it is at this point that the plane “lifts off” the ground. This relies on the shape of the wings which creates higher pressure under the wing and lower pressure above it.

But if thats the case how does biplanes take off? Do their wings have the same design?

We know how planes fly. That isn't the question here

I actually misread your initial post, I read the intial post on the forum you posted up.

They're two different questions.

In answer to your question - no the plane stands still
In answer to their question - the plane moves forwards

Actually I retract this statement, it woudl take off in either situation

Ah.. I never actually read the question on the site i posted properly. I was just interested in the conflicting theory's.

Ok, in a realistic situation. Plane is on conveyer set to match the speed of the plane as much as possible.

Is it impossible to match the same speed as the wheels?

bollocks to you then.. I retract my last post