If an airplane is sitting on the ground, with a 100mph headwind, engine off, and it normally rotates at 80, it will take off unless tied down. If that same plane is sitting on the ground, engine running full throttle, with a 0mph headwind and however it is done whether tied or on something that keeps it from moving forward, it has a 0 ground speed, a 0 air speed, and will not fly. They only thing that makes a plane fly is air over the wing.
In my example, there is no ground speed and there is no air speed, therefore the plane can't fly.
The 2 are very much tied together depending upon wind speed and direction.

 

which is where you fail to solve the myth,... eveyone that is wrong seems to assume that the plane cannot move forward and is bound to 0 air and groundspeed... when it is not the plane is allowed to move forwardand it can under full trottle regardlessof how fast a conveyor belt is turning underneath it.


and just to clarify, in th origonal myth the conveyor belt was setup to match the plane's forward true air/ground speed in the opposite direction not indicated ground speed in relation to the treadmill. so technically the plane would HAVE to move forward in order to have the treadmill move backward...

 

BOOM


If the airplanes prop pulls the air through it the plane is moving forward.
the convier is moving the opposite direction at the speed the airplane is moving forward the wheels are simply spinning twice as fast.

does that one explain it

 

And you did not read my explanation. I have always stated the if the plane is going the same speed in relation to the conveyor, not the ground. There will always be some friction etc that the plane has to overcome or start moving backwards, even if it is just at idle speed of the prop to overcome it.

 

I don't understand why we are still arguing about this, The mythbusters proved without a shadow of a doubt the plane will take off. A jet powered aircraft will also take off since it is working on the same concept as the prop plane, the wheels do not make the plane move they simply freely spin.

 

Stealth,

So on your flight line, What if you set a jet's wheels on some sort of pulley system that runs backwards. And they will match the speed of the jet. Don't teather the jet to the ground....Full trust...it will not move?

 

I don't understand why anyone had to have an actual experiment to prove this. It's so friggin' simple to begin with.

 

Yeah well, what can you do? I was kinda hoping that Stealth was just playing devil's advocate but after 15 pages of it I don't think he is

 

Obviously from the posts we are receiving even after it was proved in a real life situation people still don't think it will fly.

 

Actually all they proved is they could easily over power the conveyor. That is not the question here.

 

so what are we trying to say here, if the conveyor was moving faster than the plane I just don't see what you are saying. From what I saw that plane is going to take off as long as the wheels don't start spinning so fast that they blow off the plane. In the end if there isn't air going over the wings the plane will not fly.

 

actually that is kinda how the myth is worded.... I've been trying to explain this to the hard headed but to no avail, the way the myth is worded, the plane must move forward in order for the belt to move the same speed in the oppisite direction. its THAT simple

 

I give up, I just don't get what the argument is over I am too dumb to figure out your wording.

 

You cannot understand the obvious logic involved here, that is the problem.

A plane cannot fly if there are no aerodynamics present.

 

The wheels will, because the thrust of the engine will will push the plane against the pulley ststem and make them rotate. The plane is still on the ground.

You know, if this conveyor system actually worked then they would use it on aircraft carriers and not use the catapult system on aircraft carriers to launch jets from the flight deck. That's what makes this entire argument so hilarious.