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Can A Fly Stop A Train?! (more Technical)


boon racoon

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Thats the thing, the plane isnt moving as the conveyor is stopping it, much like when you run on a running machine, you stay in the same place (pretty much) but if the belt wasnt there you would be moving.

You stay in the same place because it's your feet pushing you forwards in the first place.

I SEE where you're coming from mate, but that's the riddle you just haven't figured yet!

The plane is powered by engines that are attatched to the wings and move the air. Unlike you running on a treadmill, they are not powered by their wheels. So the treadmill has no effect.

I cannot explain it any clearer, and fear I am repeating myself already! :turned:

Maybe if you imagine swapping the plane for a hovercraft?

Would the hovercraft move forwards??

Edited by Extreme_biker0
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Yes it can. A firefly once was spotted by an engine driver who thought it was a warning light, and so he stopped. Turned out there were twisted rails ahead nearby and they were saved from a nasty crash. Think Queen Victoria was on the train or something... long time ago... probably a twisted fable or something...

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yes as its not effected by the conveyor, however the plane is different, msn bitch :P

how the hell is the plane different ? nutter...

onzaboymark had the train one down too ages ago .... some tiny portion of the train deflects slightly (and so yes a very small portion of the train stops very briefly)- and the plane effing well does take off ...

END OF

Edited by manuel
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how the hell is the plane different ? nutter...

onzaboymark had the train one down too ages ago .... some tiny portion of the train deflects slightly - and the plane effing well does take off ...

END OF

The plane is grounded, hover craft relies on its ability to float off the ground

Plane effing well doesn't take off.

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Plane:

Plane is still. Not turned on, or moving.

Conveyor belt has the plane on it, and moves the plane down the runway on itself.

So the plane is just sat on the conveyor belt, so if the conveyor gos fast enough, surely this will have the same effect as the plane moving itself down the runway?

:S

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The plane is grounded, hover craft relies on its ability to float off the ground

Plane effing well doesn't take off.

ok just say for this the wheel bearings are perfect ....

Ok fool think about this .... Imagine in this example a hand from god holds the plane still. the conveyorbelt starts ... what happens ... the plane stays still and the wheels go round AND as the bearings are frictionless .... the hand from god does not experience any difficulty holding the plane still .... as in it needs to exert no force fowards .... Now imagine the hand does exert a force fowards => the thing goes foward and the wheels just turn faster.

NOW EXCHANGE HAND OF GOD FOR ENGINE = LIFTOFF

In fact just think about it this way - if a planes wheel bearings were frictionless when you tuned on the conveyorbelt the plane would not move. ADD A FORCE FOWARDS = LIFTOFF ...

Edited by manuel
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To anyone who is trying to convince people that the plane takes off: I know, I understand - frustrating isn't it?

The plane takes off, simply because the conveyor has NO EFFECT on it. The plane's wheels are free-turning. The plane is pushed forward by the engine's thrust against the surrounding air. Forget the f**king conveyor and go back to bed...

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NOT IF THE SPEED OF THE PLANE IS BEING COUNTER ACTED BY THE CONVEYOR BELT.

Essentially what you have just said is for instance a car on a dyno going at 60, suddenly accelerates, the cars still on the dyno as the rollers have kept up with it.

You cock

free your mind from this car dyno bullshit the conveyorbelt cannot counteract the speed of the plane ...

I tell you what - YOU tell everyone how the conveyorbelt manages to move the plane along... THE ONLY WAY THIS CAN HAPPEN IS IF THE WHEELS CANNOT MOVE ....

ALSO - THE PLANE IS NOT POWERED BY THE WHEELS !!!!

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imagine a shopping trolley with a beefy RM7 turbojet engine gaffer taped to it. the belt will make f**k all difference, as the trolley is driven by the massive engine and not the tiny wheels, which would be useless for driving due to their instability.

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You cock

free your mind from this car dyno bullshit the conveyorbelt cannot counteract the speed of the plane ...

I tell you what - YOU tell everyone how the conveyorbelt manages to move the plane along... THE ONLY WAY THIS CAN HAPPEN IS IF THE WHEELS CANNOT MOVE ....

ALSO - THE PLANE IS NOT POWERED BY THE WHEELS !!!!

But thats the theory, that if a plane was on a conveyor belt going the same speed as the plane in the opposite direction would the plane take off?

So if the plane needs to go at 300 mph at take off (made up figure) and the converyor belt was going at 300 mph the opposite direction it wouldnt take off would it?

P.S. Please dont call me a cock :)

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You're wasting your time manuel, people like this refuse to ditch what they 'know' is the correct answer. These people are not the risk takers.

I just hope someone doesn't mention the Monty Hall Problem anytime soon... whoops!

ooh whats that - ive not heard that one ....

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You're wasting your time manuel, people like this refuse to ditch what they 'know' is the correct answer. These people are not the risk takers.

I just hope someone doesn't mention the Monty Hall Problem anytime soon... whoops!

I dont refuse to 'ditch what I 'know' is the correct answer' this is my theory and im argueing my point, no one else has convinced me otherwise yet.

If and when they do then ill accept im wrong.

EDIT: Also what is the monty hall problem?

Edited by Has anyone seen my shoe?
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But thats the theory, that if a plane was on a conveyor belt going the same speed as the plane in the opposite direction would the plane take off?

So if the plane needs to go at 300 mph at take off (made up figure) and the converyor belt was going at 300 mph the opposite direction it wouldnt take off would it?

P.S. Please dont call me a cock :)

Ok sorry the cock was in jest ... I apologise

you are still missing the point - just because the speed of the conveyorbelt is referenced to the plane it doesnt mean it is having any effect whatsoever on it. the conveyorbelt could be going a million miles an hour in the opposite direction and it would still take off (although - in the real world the friction in the bearings would scupper this...)

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Ok sorry the cock was in jest ... I apologise

you are still missing the point - just because the speed of the conveyorbelt is referenced to the plane it doesnt mean it is having any effect whatsoever on it. the conveyorbelt could be going a million miles an hour in the opposite direction and it would still take off (although - in the real world the friction in the bearings would scupper this...)

I dont understand and I dont think I ever will.

Ill ask my physics teacher on wednesday. :)

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