A jet plane on a large treadmill

I know what a treadmill is. Now please tell me WTF a threadmill is.

it's a mill for threads. or a misspelling. you choose.

this is fucking rediculous, of course the plane takes off. No treadmill can stop the motion of a plane once the engines turn on. The jets turn on, the plane moves forward at the same speed as usual, and the wheels spin like mad and dont do anything. Jesus, 20 pages for this.

AD, THIS QUESTION is a thredmill.

Just in case some of you have become confused by these 20 pages let me simplify the whole damn thing by giving you the answer....

THE PLANE WILL TAKE OFF.

If you don't understand how it could then thats too bad for you just deal with it.

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Originally Posted by Lonnie

How about a helicopter? Could it take off if sitting on a treadmill?

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Better yet, what about a helicopter sitting on a merry-go-round that is spinning in the opposite direction as the blades, matching their rotation?;)

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Originally Posted by MeatPuppet

Better yet, what about a helicopter sitting on a merry-go-round that is spinning in the opposite direction as the blades, matching their rotation?;)

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W00T!! LOL!! The helo takes off methinks:cool:

What's the proportional snake loading between the merry-go-round and the helicopter?

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Originally Posted by Reno

What's the proportional snake loading between the merry-go-round and the helicopter?

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Black on yellow kill a fella?

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Originally Posted by "The Big One"

A plane (747 passenger jet) is sitting on a runway that can move (some sort of band conveyor). The plane moves in one direction, while the conveyor moves in the opposite direction. This conveyor has a control system that tracks the planes speed and tunes the speed of the conveyor to be exactly the same (but in the opposite direction).

The question is:

Will the plane (747 passenger jet) take off or not?

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Without reading this whole thread......
Of course the plane would fly.
Jet planes operate off of thrust which gets it's propulsion from the air. If planes took off by using torque to tires like a car, then the "conveyor" would be relevant. In this case, it's not. The conveyor would just spin the wheels on the plane twice as fast. ;)


Here's an even tougher question- What weighs more?

A pound of feathers or a pound of gold?

But what if there are MOTHERFUCKING SNAKES ON THE MOTHERFUCKING TREADMILL!?

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Originally Posted by Summit

But what if there are MOTHERFUCKING SNAKES ON THE MOTHERFUCKING TREADMILL!?

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then we all would be motherfucked!

This plane with take off, motherfucking snakes or none.

Blurred has it exactly right.

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Originally Posted by Bernardo

Credentials: I'm an Aerospace Engineer AND Mathematician.

Solution: The airplane WILL take off.

Explanation: Thrust is provided by the jet engines. Thrust is needed to overcome Drag. Drag is made up of aerodynamic drag, and friction drag on the wheels. The friction drag on the wheels/bearings will be *marginally* higher on the spinning treadmill, but will continuously diminish as the airplane gains speed and the lift increases, thus reduction wheel friction.

Source of confusion: The problem statement is slightly confusing because it says something about the treadmill spinning at the same speed of the aircraft. This could induce some people to believe that the two velocities cancel each other out, whereas the truth is that the wheels will simply spin twice as fast (remember, the wheels of the aircraft are free spinning).

- B

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I'm changing my POV. I'm with this guy. Stupid freespinning wheels, confusing me. If somehow the wheels were restricted to spin only as fast as the air speed was then the velocities would negate each other, but with freespinning wheels, I now think that this would take off.

I have: a really old pair of rollerblades somewhere
I have: some rope

If you have:
A motorcycle
A treadmill

Then we need to make this happen. We can then track down and send invitations to the 40 or so people that voted for "no take off" in the other thread and get them here to try it out.

Who's your dead friend there?
Cause he's dead.
*points @ dude on treadmill with rollerblades*

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Originally Posted by yodaottis

I have: a really old pair of rollerblades somewhere
I have: some rope

If you have:
A motorcycle
A treadmill

Then we need to make this happen. We can then track down and send invitations to the 40 or so people that voted for "no take off" in the other thread and get them here to try it out.

Who's your dead friend there?
Cause he's dead.
*points @ dude on treadmill with rollerblades*

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Well, actually, the dead dude would be off the treadmill :fm:

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Originally Posted by BlurredElevens

Without reading this whole thread......
Of course the plane would fly.
Jet planes operate off of thrust which gets it's propulsion from the air. If planes took off by using torque to tires like a car, then the "conveyor" would be relevant. In this case, it's not. The conveyor would just spin the wheels on the plane twice as fast. ;)


Here's an even tougher question- What weighs more?

A pound of feathers or a pound of gold?

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Pound of feathers - gold is measured in troy units - 14oz to a pound.

A youtube vid

So, for those who had problems with 'The jet plane on a large treadmill' thread... what happens if the speed of the escalator is increased?

He'd stop obviously.

speaking of superthread....

Page top, bitches!!

:D
Bump

Im pretty sure the plane is going to stay on the runway...I dont see how it can take off. It cant go forward cause the treadmill is running;)

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Originally Posted by Brock Landers

:D
Bump

Im pretty sure the plane is going to stay on the runway...I dont see how it can take off. It cant go forward cause the treadmill is running;)

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You seem like a cool person and I really do enjoy your humor and your posts entertain me very much. However, you are a damn idiot for not seeing how the plane will take off. The treadmill is only going to cause the wheels to spin faster. Thats all. That is the only thing that will change in comparison to a regular (no treadmill) takeoff. THE MOTHAFUCKIN PLANE WILL TAKEOFF!! A car would not be able to go forward but the plane will. Even a single prop Cessna would take off.;)

NO IT WOULDN'T!!!!!!!! The sky would implode into a blackhole if that plane takes off!;)

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Originally Posted by AsheanMT

A car would not be able to go forward but the plane will.

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aghhhhhhhhh!!!!!:cussing: :cussing: :mad: :redface: :nonono2: :nonono2: :rolleyes: :cussing:

;)

FKNA !!!

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Originally Posted by Brock Landers

:D
Bump

Im pretty sure the plane is going to stay on the runway...I dont see how it can take off. It cant go forward cause the treadmill is running;)

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WHY Brock WHY????

STOP THE INSANITY!!!

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Originally Posted by brice618

NO IT WOULDN'T!!!!!!!! The sky would implode into a blackhole if that plane takes off!;)

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What if the black hole is also on the treadmill?

The picture from page 12 is a classic by the way.

The only thing that matters is the airspeed over the foil. If the plane achieves take off velocity, it will take off regardless of what the wheels are touching.

a car wouldn't move

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Originally Posted by japollner

The only thing that matters is the airspeed over the foil. If the plane achieves take off velocity, it will take off regardless of what the wheels are touching.

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Spot on sir...

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Originally Posted by the Mad

It won't fly. It won't fucking fly.. Morons.

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i wanted to preserve this gem for future generations of page 21 viewers.

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Originally Posted by the Mad

Just when I want to make friends...:rolleyes:

A plane lifts from the wings passing thru air which is matter. If the wheels are spinning but the wings remain stationary... how the fuck is it ever going to take off. We're not talking about a goddamn harrier here.

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now you just want to make me quote every post of yours in your thread for preservation purposes. :nonono2:

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Originally Posted by the Mad

Just when I want to make friends...:rolleyes:

A plane lifts from the wings passing thru air which is matter. If the wheels are spinning but the wings remain stationary... how the fuck is it ever going to take off. We're not talking about a goddamn harrier here.

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Well if thats what you want to think then don't let those of us who know what the hell is going on stop you. Go on with your wrong self!!

so much hate on one little thread.

all I was doing was pissing off during an exam

no, mad, i'm not. may i refer you to the illustration on page 12? (although i have stated my opinion in this thread much earlier) :)

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Originally Posted by the Mad

Just when I want to make friends...:rolleyes:

A plane lifts from the wings passing thru air which is matter. If the wheels are spinning but the wings remain stationary... how the fuck is it ever going to take off. We're not talking about a goddamn harrier here.

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If you would read at least some of the thread (I know, it is long) you would see that this is addressed... a dozen times. Both sides of the argument understand that a plane needs to move forward in order to achieve lift and take off. Duh. The people who think the plane takes off believe the plane will move forward regardless of the treadmill. If you want to understand why it moves forward, keep reading the thread.

edit: I can't believe I posted in this thead again.

A plane, whose engines thrust against the air, does move forward and subsequently takes off. A car, whose engines thrust against the ground, does not move forward because that thrust vector is negated 1-1 by the backwards rotation of the treadmill.

Can we now please fucking stop. The thread is akin to that show "Are you smarter than a 6th grader?" The answer of which should be obvious unless you're retarded.

http://www.tetongravity.com/forums/a...1&d=1134762033

For Lurch.

Guys, I've got an update for you. I deliberately taxied onto a huge fucking treadmill the other day and tried to take off going against the motion of it, but it didn't work despite all 145 HP so I spun the plane around with some fancy differential braking and winked at the guy controlling the speed lever. He cranked it to eleven and I took off with the direction of the treadmill. Thing is, I had to hold my brakes on cuz otherwise I would have just staying in one position with my wheels rolling backwards. It was like being steam-a-pulted off an aircraft carrier.