Funny, Strange, Random Pics - Page 1217

Pikn · 01-28-2008, 01:32 AM

The plane receives lift from the air flow generated by the treadmill and then in turn.... seriously? Are you guys honestly discussing this? Stop posting and read wikipedia at the very least.

Blumpster · 01-28-2008, 01:56 AM

The plane will instantly begin to accelerate off the platform. It will NOT stay in place on the treadmill. Will it actually have enough airspeed to take off? Probably not. The plane will either crash or land on the ground after leaving the moving ground. Think of it like a submarine under water. If you have a sub underwater on a treadmill, do you think it'd stay in place as its propeller exerts force onto the water? No, that fucker is leaving the treadmill in the dust.

Ok, so probably not a good comparison since airplanes need to create lift and all that, but still, its the same principle.

Zuuljin · 01-28-2008, 02:22 AM

It begins again.......

I'm suprised mythbusters is doing this. I seem to remember them saying they wont because it will obviously take off. But I guess its a good rating grabber heh.

OhSeven · 01-28-2008, 02:29 AM

Sweet to see them test this to get people to shut the fuck up about it.

Anyway pics

Lonin · 01-28-2008, 02:29 AM

Pro tip: The plane will take off.

The reason this is so controversial is that it's easy to misunderstand. Most people read the riddle and automatically assume that the plane will stay stationary in space because of the treadmill. Following that logic, no air will pass over the wings and the plane won't take off. This is how it works when a person is on a treadmill and even when a car is on a treadmill, so it seems logical, but it only works that way because the force being used to move for both a person and a car is coming from the object touching the ground, feet and tires respectively. Therefore, any force that would normally move the person or car forward is instead nullified by the treadmill.

Now, a plane's moving force comes from a propeller or a jet engine, neither of which use the ground (or treadmill in this case) to move. Instead a plane's force acts upon the air behind the propeller or jet. The treadmill is irrelevant because the air that the plane is essentially pushing off of is stationary, unlike the treadmill, so the plane will still move forward. The only difference between a plane on a treadmill and a plane on a normal runway is that the wheels will just end up having to move twice as fast on the treadmill to take off.

Remember, every action has an equal and opposite reaction, so all that thrust against the air behind the propeller or jet has to have a reaction, and that reaction is for the plane to move forward. Once the plane moves forward at a sufficient pace, it will take off. The automatic assumption that people make, that the plane won't move in space, is wrong. The plane will move forward and because of this, it will take off as well.

Whether or not this will happen on Mythbusters is another story. Theoretically and under high-quality testing conditions the plane will take off every time. From what little that video showed though, that doesn't look like an ideal testing rig, so who knows what will happen.

fucker · 01-28-2008, 02:46 AM

Quote:

Originally Posted by Pikn

The plane receives lift from the air flow generated by the treadmill and then in turn.... seriously? Are you guys honestly discussing this? Stop posting and read wikipedia at the very least.

got to agree with him
some kind of 21th chromosome virus hitted you all during the weekend or what?

dy fey · 01-28-2008, 03:54 AM

Stoerm · 01-28-2008, 04:01 AM

Hahah, now that's funny.

Rodyland · 01-28-2008, 04:04 AM

Quote:

Originally Posted by dy fey

a

LOL

Indiana · 01-28-2008, 04:15 AM

Quote:

Originally Posted by dy fey

a

Haha, picture of the month right there.

fucker · 01-28-2008, 04:21 AM

Quote:

Originally Posted by dy fey

a

best picture of the month

but to answer your question.....yes it would take off with enought speed

Darkreapr · 01-28-2008, 04:52 AM

I'm preety sure this debate was settled last time with, yes it will take off , so im suprised to see many people saying it wont now. Wish I had the link to the final discussion about it.

Kevincheese · 01-28-2008, 05:00 AM

Picture of the month?

It's a different chopper, but... OLD!

SalaciousTunare · 01-28-2008, 05:07 AM

The plane will NEVER take off assuming the treadmill can infinitely match the wheels of the plane.

Essentially all you would have is a plane slowly lurching forward, the treadmill increases speed to compensate, the wheels lurch forwards faster, the treadmill increases thus faster.

Theoretically the plane would never take off, the only force being horizontal thrust, with zero wind current over the wings.

The only jet that would take off would be a harrier or f-22.

You must realize there is no vertical thrust in an airplane's engines, there is only vertical thrust in it's wings.

All this of course assumes an exponential increase in speed of both the treadmill and the wheels.

Think of it this way, if a plane is tethered to the ground with a chain, the fucking plane will not just start flapping around in the air while attached to the fucking ground. The plane must have adequate ground speed to reach the critical low pressure air current over the wing while having high pressure under the wing to create lift. This lift is ENTIRELY environmental, it has nothing to do with the engine or propellor, both of which create horizontal lift only. (again Harrier and F-22 aside which both have vertical takeoff)

Stoerm · 01-28-2008, 05:20 AM

No. There is no treadmill. The treadmill has zero capability to affect the movement of the airplane. Get a clue.

01-28-2008, 02:22 AM	#18243 (permalink)
Zuuljin So there's this plane on a treadmill... Join Date: Jan 2005 Location: Southern California Posts: 3,215 +20 Internets	It begins again....... I'm suprised mythbusters is doing this. I seem to remember them saying they wont because it will obviously take off. But I guess its a good rating grabber heh. __________________ " We are all atheists about most of the gods that societies have ever believed in. Some of us just go one god further." Richard Dawkins (1941 - ), "The Root of All Evil", UK Channel 4, 2006

01-28-2008, 02:29 AM	#18245 (permalink)
Lonin ಠ_ಠ Join Date: May 2006 Location: Washington (STATE) Posts: 1,553 +27 Internets	Pro tip: The plane will take off. The reason this is so controversial is that it's easy to misunderstand. Most people read the riddle and automatically assume that the plane will stay stationary in space because of the treadmill. Following that logic, no air will pass over the wings and the plane won't take off. This is how it works when a person is on a treadmill and even when a car is on a treadmill, so it seems logical, but it only works that way because the force being used to move for both a person and a car is coming from the object touching the ground, feet and tires respectively. Therefore, any force that would normally move the person or car forward is instead nullified by the treadmill. Now, a plane's moving force comes from a propeller or a jet engine, neither of which use the ground (or treadmill in this case) to move. Instead a plane's force acts upon the air behind the propeller or jet. The treadmill is irrelevant because the air that the plane is essentially pushing off of is stationary, unlike the treadmill, so the plane will still move forward. The only difference between a plane on a treadmill and a plane on a normal runway is that the wheels will just end up having to move twice as fast on the treadmill to take off. Remember, every action has an equal and opposite reaction, so all that thrust against the air behind the propeller or jet has to have a reaction, and that reaction is for the plane to move forward. Once the plane moves forward at a sufficient pace, it will take off. The automatic assumption that people make, that the plane won't move in space, is wrong. The plane will move forward and because of this, it will take off as well. Whether or not this will happen on Mythbusters is another story. Theoretically and under high-quality testing conditions the plane will take off every time. From what little that video showed though, that doesn't look like an ideal testing rig, so who knows what will happen. __________________

01-28-2008, 03:54 AM	#18247 (permalink)
dy fey coffee and cigarettes, zeppelin and tool. Join Date: Apr 2006 Posts: 472 +24 Internets	a Attached Images

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01-28-2008, 01:32 AM	#18241 (permalink)
Pikn Registered User Join Date: Sep 2003 Location: Canadia Posts: 515 -10 Internets	The plane receives lift from the air flow generated by the treadmill and then in turn.... seriously? Are you guys honestly discussing this? Stop posting and read wikipedia at the very least.

01-28-2008, 01:56 AM	#18242 (permalink)
Blumpster . Join Date: Dec 2005 Location: Washington Posts: 2,304 +14 Internets	The plane will instantly begin to accelerate off the platform. It will NOT stay in place on the treadmill. Will it actually have enough airspeed to take off? Probably not. The plane will either crash or land on the ground after leaving the moving ground. Think of it like a submarine under water. If you have a sub underwater on a treadmill, do you think it'd stay in place as its propeller exerts force onto the water? No, that fucker is leaving the treadmill in the dust. Ok, so probably not a good comparison since airplanes need to create lift and all that, but still, its the same principle.

01-28-2008, 04:01 AM	#18248 (permalink)
Stoerm Registered User Join Date: Aug 2002 Location: La Costa Posts: 566	Hahah, now that's funny.

01-28-2008, 04:52 AM	#18252 (permalink)
Darkreapr Registered User Join Date: Feb 2004 Posts: 171 -17 Internets	I'm preety sure this debate was settled last time with, yes it will take off , so im suprised to see many people saying it wont now. Wish I had the link to the final discussion about it.

01-28-2008, 05:07 AM	#18254 (permalink)
SalaciousTunare Idiot Prodigy Join Date: Apr 2003 Posts: 1,141 -11 Internets	The plane will NEVER take off assuming the treadmill can infinitely match the wheels of the plane. Essentially all you would have is a plane slowly lurching forward, the treadmill increases speed to compensate, the wheels lurch forwards faster, the treadmill increases thus faster. Theoretically the plane would never take off, the only force being horizontal thrust, with zero wind current over the wings. The only jet that would take off would be a harrier or f-22. You must realize there is no vertical thrust in an airplane's engines, there is only vertical thrust in it's wings. All this of course assumes an exponential increase in speed of both the treadmill and the wheels. Think of it this way, if a plane is tethered to the ground with a chain, the fucking plane will not just start flapping around in the air while attached to the fucking ground. The plane must have adequate ground speed to reach the critical low pressure air current over the wing while having high pressure under the wing to create lift. This lift is ENTIRELY environmental, it has nothing to do with the engine or propellor, both of which create horizontal lift only. (again Harrier and F-22 aside which both have vertical takeoff)

01-28-2008, 05:20 AM	#18255 (permalink)
Stoerm Registered User Join Date: Aug 2002 Location: La Costa Posts: 566	No. There is no treadmill. The treadmill has zero capability to affect the movement of the airplane. Get a clue.