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MythBusters

Page 6 - Seeking answers? Join the AnandTech community: where nearly half-a-million members share solutions and discuss the latest tech.
Originally posted by: jandrews
Originally posted by: BudAshes
Basically, if the treadmill can approach infinite speed and the wheels create friction where they attach to the jet, then the plane will not take off. In any other scenario it will. It's pretty fvcking simple.

lmao, here we go again, btw I agree w/ u.

nope, the airplane takes off. backwards though.
 
ok.. after going through and actually reading the thread and getting a fresh understanding of what the myth actually is, i'll have to shift to the camp that the plane will take off. As long as the plane has enough thrust to overcome the wheel friction, it should go down the conveyor with enough speed to take off.
 
Originally posted by: randay
Originally posted by: jandrews
Originally posted by: BudAshes
Basically, if the treadmill can approach infinite speed and the wheels create friction where they attach to the jet, then the plane will not take off. In any other scenario it will. It's pretty fvcking simple.

lmao, here we go again, btw I agree w/ u.

nope, the airplane takes off. backwards though.

*head explodes*
 
Originally posted by: HydroSqueegee
ok.. after going through and actually reading the thread and getting a fresh understanding of what the myth actually is, i'll have to shift to the camp that the plane will take off. As long as the plane has enough thrust to overcome the wheel friction, it should go down the conveyor with enough speed to take off.

but that's just it...there is no friction from the wheels acting against the thrust b/c they are free-spinning. no "ifs"in this case.

the plane will take off.

oh god...now look at what I did 🙁
/wrist
 
Originally posted by: zinfamous
Originally posted by: HydroSqueegee
ok.. after going through and actually reading the thread and getting a fresh understanding of what the myth actually is, i'll have to shift to the camp that the plane will take off. As long as the plane has enough thrust to overcome the wheel friction, it should go down the conveyor with enough speed to take off.

but that's just it...there is no friction from the wheels acting against the thrust b/c they are free-spinning. no "ifs"in this case.

the plane will take off.

oh god...now look at what I did 🙁
/wrist

in respect to the mythbusters episode the bearings will not be magical and there will be some friction. also depending on what kind of scale experiment they do most model airplanes are extremely light and dont require much thrust, in this aspect they arent very accurate to scale. could throw off thier results and i very much doubt that they will be doing a full scale experiment. who knows what they'll end up with.

but it doesnt change the fact that the answer to the myth is that the airplane takes off.
 
I don't think I've ever seen the myth explained specifically enough. In some cases, the plane would take off, while in others it wouldn't.

If the treadmill is only as big as the plane can fit on it, it will obviously not take off due to a lack of wind resistance (it can't move forward).

If the treadmill is of infinite or runway length, then the plane's engines will easily overcome the force of the treadmill on the wheels, thus it moves forwards and takes off.
 
Originally posted by: jandrews
Yes, you are correct, but what ruins your whole idea is the plane remaining stationary due to the wheels and cannot gain the momentum needed to provide the wind resistance to take off. For some reason you keep thinking the jets would continue to push the plane forward giving my hypothetical example of an infinite treadmill that could keep up with the wheel speed.

uh, what is holding the wheels back? are they chocked?

Originally posted by: jandrews The plane is dependant on getting up enough ground speed to get the air resistance needed to take off in the air no matter what is said.
actually it only needs airspeed. there are various R/C planes with enough lift that they can take off and land backwards in a decent wind.






suppose the plane is superglued to the treadmill. then the engine is pegged on the plane and the motor is turned up on the treadmill so that the forces cancel each other out. will the plane ever take off?
 
Originally posted by: ConstipatedVigilante
I don't think I've ever seen the myth explained specifically enough. In some cases, the plane would take off, while in others it wouldn't.

If the treadmill is only as big as the plane can fit on it, it will obviously not take off due to a lack of wind resistance (it can't move forward).

If the treadmill is of infinite or runway length, then the plane's engines will easily overcome the force of the treadmill on the wheels, thus it moves forwards and takes off.

make up your mind... if it is not going to take off since it remains stationary, what difference does it make how long the treadmill is?

 
Originally posted by: ElFenix
Originally posted by: jandrews
Yes, you are correct, but what ruins your whole idea is the plane remaining stationary due to the wheels and cannot gain the momentum needed to provide the wind resistance to take off. For some reason you keep thinking the jets would continue to push the plane forward giving my hypothetical example of an infinite treadmill that could keep up with the wheel speed.

uh, what is holding the wheels back? are they chocked?

Originally posted by: jandrews The plane is dependant on getting up enough ground speed to get the air resistance needed to take off in the air no matter what is said.
actually it only needs airspeed. there are various R/C planes with enough lift that they can take off and land backwards in a decent wind.






suppose the plane is superglued to the treadmill. then the engine is pegged on the plane and the motor is turned up on the treadmill so that the forces cancel each other out. will the plane ever take off?
now you're just being ridiculous

 
Originally posted by: sdifox
Originally posted by: ConstipatedVigilante
I don't think I've ever seen the myth explained specifically enough. In some cases, the plane would take off, while in others it wouldn't.

If the treadmill is only as big as the plane can fit on it, it will obviously not take off due to a lack of wind resistance (it can't move forward).

If the treadmill is of infinite or runway length, then the plane's engines will easily overcome the force of the treadmill on the wheels, thus it moves forwards and takes off.

make up your mind... if it is not going to take off since it remains stationary, what difference does it make how long the treadmill is?

It... uhh... actually kinda... uhh... does, because after overcoming the initial friction of the wheels, ze plane still has to reach it's required airspeed to take off, so if ze runway is too short, ze plane does not take off...
 
I've never seen a more dense person who refuses to thoroughly read anything than Jandrews.

The argument isn't about wind going over the wings. It's about the plane moving foward in relation to a point outside of the threadmill/plane model. In relation to this point, the plane moves forward as if the treadmill is nonexistent. Numerous youtube videos already show that the plane moves foward. Engines act on the air, not on the ground.

A Car WILL stay stationary
A plane will not.

I have no idea why you are so stupidly dense not to realize this utterly simple riddle.
 
Originally posted by: SSSnail
Originally posted by: sdifox
Originally posted by: ConstipatedVigilante
I don't think I've ever seen the myth explained specifically enough. In some cases, the plane would take off, while in others it wouldn't.

If the treadmill is only as big as the plane can fit on it, it will obviously not take off due to a lack of wind resistance (it can't move forward).

If the treadmill is of infinite or runway length, then the plane's engines will easily overcome the force of the treadmill on the wheels, thus it moves forwards and takes off.

make up your mind... if it is not going to take off since it remains stationary, what difference does it make how long the treadmill is?

It... uhh... actually kinda... uhh... does, because after overcoming the initial friction of the wheels, ze plane still has to reach it's required airspeed to take off, so if ze runway is too short, ze plane does not take off...

The problem is not about the plane falling off the conveyor belt, it's about whether it can keep the plane from taking off.
 
Originally posted by: DanTMWTMP
I've never seen a more dense person who refuses to thoroughly read anything than Jandrews.

The argument isn't about wind going over the wings. It's about the plane moving foward in relation to a point outside of the threadmill/plane model. In relation to this point, the plane moves forward as if the treadmill is nonexistent. Numerous youtube videos already show that the plane moves foward. Engines act on the air, not on the ground.

A Car WILL stay stationary
A plane will not.

I have no idea why you are so stupidly dense not to realize this utterly simple riddle.

pssssst the funny thing is if you would have read this thread, specifically page four you will find that I did agree with your statement and any continuing argument was only based on a bunch of hypothetical variables such as friction and infinite treadmills etc etc. So does this make you dense, an idiot or just a hypocrite? Take your pick.
 
Originally posted by: DanTMWTMP
I've never seen a more dense person who refuses to thoroughly read anything than Jandrews.

The argument isn't about wind going over the wings. It's about the plane moving foward in relation to a point outside of the threadmill/plane model. In relation to this point, the plane moves forward as if the treadmill is nonexistent. Numerous youtube videos already show that the plane moves foward. Engines act on the air, not on the ground.

A Car WILL stay stationary
A plane will not.

I have no idea why you are so stupidly dense not to realize this utterly simple riddle.

I don't know, I think ILUVTRUENOS is denser.
 
Originally posted by: sdifox
Originally posted by: SSSnail
Originally posted by: sdifox
Originally posted by: ConstipatedVigilante
I don't think I've ever seen the myth explained specifically enough. In some cases, the plane would take off, while in others it wouldn't.

If the treadmill is only as big as the plane can fit on it, it will obviously not take off due to a lack of wind resistance (it can't move forward).

If the treadmill is of infinite or runway length, then the plane's engines will easily overcome the force of the treadmill on the wheels, thus it moves forwards and takes off.

make up your mind... if it is not going to take off since it remains stationary, what difference does it make how long the treadmill is?

It... uhh... actually kinda... uhh... does, because after overcoming the initial friction of the wheels, ze plane still has to reach it's required airspeed to take off, so if ze runway is too short, ze plane does not take off...

The problem is not about the plane falling off the conveyor belt, it's about whether it can keep the plane from taking off.
Well, it can't take off if it's falling off, now can it?
 
Originally posted by: Rubycon
Originally posted by: Jeff7
Then the plane gets off, instead of taking off.

747? 240 foot long penis? The pool is full of drool. 😉
Ok, so what exactly would you do with a 240 foot long penis? Though...I suppose, if properly stimulated, it could at least provide a little bit of thrust for the cruise ship. Of course, this thrust would only come in short spurts, but that goes without saying.
 
Originally posted by: Jeff7

Originally posted by: randay
what if the in-air movie is a porno?
Then the plane gets off, instead of taking off.

i disagree, if you assume a porno with infinite vjayjay and to keep it simple, lets say zero sausage. according to my free body diagram here, the airplane cannot get off!
 
Originally posted by: ConstipatedVigilante
Originally posted by: sdifox
Originally posted by: SSSnail
Originally posted by: sdifox
Originally posted by: ConstipatedVigilante
I don't think I've ever seen the myth explained specifically enough. In some cases, the plane would take off, while in others it wouldn't.

If the treadmill is only as big as the plane can fit on it, it will obviously not take off due to a lack of wind resistance (it can't move forward).

If the treadmill is of infinite or runway length, then the plane's engines will easily overcome the force of the treadmill on the wheels, thus it moves forwards and takes off.

make up your mind... if it is not going to take off since it remains stationary, what difference does it make how long the treadmill is?

It... uhh... actually kinda... uhh... does, because after overcoming the initial friction of the wheels, ze plane still has to reach it's required airspeed to take off, so if ze runway is too short, ze plane does not take off...

The problem is not about the plane falling off the conveyor belt, it's about whether it can keep the plane from taking off.
Well, it can't take off if it's falling off, now can it?

now you are just changing the problem...
 
Originally posted by: ConstipatedVigilante
Originally posted by: sdifox
Originally posted by: SSSnail
Originally posted by: sdifox
Originally posted by: ConstipatedVigilante
I don't think I've ever seen the myth explained specifically enough. In some cases, the plane would take off, while in others it wouldn't.

If the treadmill is only as big as the plane can fit on it, it will obviously not take off due to a lack of wind resistance (it can't move forward).

If the treadmill is of infinite or runway length, then the plane's engines will easily overcome the force of the treadmill on the wheels, thus it moves forwards and takes off.

make up your mind... if it is not going to take off since it remains stationary, what difference does it make how long the treadmill is?

It... uhh... actually kinda... uhh... does, because after overcoming the initial friction of the wheels, ze plane still has to reach it's required airspeed to take off, so if ze runway is too short, ze plane does not take off...

The problem is not about the plane falling off the conveyor belt, it's about whether it can keep the plane from taking off.
Well, it can't take off if it's falling off, now can it?

This is a new and exciting scenario. A plane is stationed on an infinitely small treadmill at the edge of a cliff. Assuming the ground at the bottom is frictionless, will the plane take off?

My only hope is that the conveyor plane has to face off against a frozen chicken.
 
Originally posted by: Skeeedunt
Originally posted by: ConstipatedVigilante
Originally posted by: sdifox
Originally posted by: SSSnail
Originally posted by: sdifox
Originally posted by: ConstipatedVigilante
I don't think I've ever seen the myth explained specifically enough. In some cases, the plane would take off, while in others it wouldn't.

If the treadmill is only as big as the plane can fit on it, it will obviously not take off due to a lack of wind resistance (it can't move forward).

If the treadmill is of infinite or runway length, then the plane's engines will easily overcome the force of the treadmill on the wheels, thus it moves forwards and takes off.

make up your mind... if it is not going to take off since it remains stationary, what difference does it make how long the treadmill is?

It... uhh... actually kinda... uhh... does, because after overcoming the initial friction of the wheels, ze plane still has to reach it's required airspeed to take off, so if ze runway is too short, ze plane does not take off...

The problem is not about the plane falling off the conveyor belt, it's about whether it can keep the plane from taking off.
Well, it can't take off if it's falling off, now can it?

This is a new and exciting scenario. A plane is stationed on an infinitely small treadmill at the edge of a cliff. Assuming the ground at the bottom is frictionless, will the plane take off?

My only hope is that the conveyor plane has to face off against a frozen chicken.

Well I guess if you imagine it like an infinitely small parking stall and you think gosh theres no way im ever gonna fit in there but then you fold in the side view mirrors and sure enough well look at that.
 
Originally posted by: randay
Originally posted by: Skeeedunt
Originally posted by: ConstipatedVigilante
Originally posted by: sdifox
Originally posted by: SSSnail
Originally posted by: sdifox
Originally posted by: ConstipatedVigilante
I don't think I've ever seen the myth explained specifically enough. In some cases, the plane would take off, while in others it wouldn't.

If the treadmill is only as big as the plane can fit on it, it will obviously not take off due to a lack of wind resistance (it can't move forward).

If the treadmill is of infinite or runway length, then the plane's engines will easily overcome the force of the treadmill on the wheels, thus it moves forwards and takes off.

make up your mind... if it is not going to take off since it remains stationary, what difference does it make how long the treadmill is?

It... uhh... actually kinda... uhh... does, because after overcoming the initial friction of the wheels, ze plane still has to reach it's required airspeed to take off, so if ze runway is too short, ze plane does not take off...

The problem is not about the plane falling off the conveyor belt, it's about whether it can keep the plane from taking off.
Well, it can't take off if it's falling off, now can it?

This is a new and exciting scenario. A plane is stationed on an infinitely small treadmill at the edge of a cliff. Assuming the ground at the bottom is frictionless, will the plane take off?

My only hope is that the conveyor plane has to face off against a frozen chicken.

Well I guess if you imagine it like an infinitely small parking stall and you think gosh theres no way im ever gonna fit in there but then you fold in the side view mirrors and sure enough well look at that.

But it's infinitely small. It would be like that scene in Christine where the car goes into the really narrow alley and gets all mashed up by ramming itself in there. Or like if a car got into the trash compactor in Star Wars.
 
Mother of god, does no one watch the youtube videos where they actually put a RC plane on a treadmill and show it can take off.
 
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