Mythbusters/airplane on a treadmill.

Hammered said:
Well then I think I've had an awakening... (air is mass...)

So the fact REALLY is no matter whats going on ON THE GROUND, the propellers / engines are pulling through the air (mass). OK OK, I stand down.
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HALLELUJAH!!

98XJSport said:
Yes, brakes as required. As in when they slow down enough for them to be used without making the jet skid out of control.

Talking in the world of big jetlines, of course.
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1. Anti-skid.

2. Brake energy limit.
 
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I got bored of trying to read this after the 4th page...

if this is a typical aircraft like a Cessna 172, and the conveyor belt is a thousand or so feet long, with no tailwinds, and the brakes are released, and they don't turn on the conveyor until after the engine runs up to power, and the plane is not tethered to something... my answer is YES, the plane will take off.

With the brakes released, they will spin whatever speed the conveyor belt is moving, plus or minus the ground speed of the aircraft. If the conveyor belt is spinning at 20mph going "south", and the plane is not moving (tethered), then the tires will have a 20mph speed. If the plane's engine+prop produce enough thrust to move the plane "north" at 20mph, then the tires will be have a 40mph speed. And if the engine/prop moves the plane 20mph "south", the tires will have 0mph speed. And, if the engine/prop move the plane at 100mph north, the tires will be at 120mph for a short period, then slow to 0mph unless pilot is stupid and keeps pushing the yoke in. :)

To bet yes or no, I'd have to know all of the stupid little specifications of what mythbusters are gonna do. If they don't mess up too much, the plane will take off.
 
I'm simply amazed this thread is 17 pages long and actually STAYED ON TOPIC!
 
Ghost said:
I'm simply amazed this thread is 17 pages long and actually STAYED ON TOPIC!
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I like whole wheat bread. :chef:























and it's gonna fly! :D
 
Ok this has to be one of the dumbest threads ever. Who gives a shit whether the plane will take off or not. Are you ever going to fly or be flown in a plane that is going to taxi onto a treadmill and try to take off? My guess would be NO. What idiot thought of this shit anyways!!!1
 
1985xjlaredo said:
Ok this has to be one of the dumbest threads ever. Who gives a shit whether the plane will take off or not. Are you ever going to fly or be flown in a plane that is going to taxi onto a treadmill and try to take off? My guess would be NO. What idiot thought of this shit anyways!!!1
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You obviously miss the point. What started out as a question to help a flight student understand BASIC physics has turned into a sight glass viewing the citizenship of the internet (possibly the whole of America?). You are a DUMB ASS if you cannot answer this question in more than one sentance.

American citizens = dumbass
Most people on internet = dumbass


:explosion
 
Kids in California calling others Dumbass = the funny. Skinny shortbus kid calling others a dumbass = the bonus. Well done scrappy again! :)

scrappy again said:
You obviously miss the point. What started out as a question to help a flight student understand BASIC physics has turned into a sight glass viewing the citizenship of the internet (possibly the whole of America?). You are a DUMB ASS if you cannot answer this question in more than one sentance.

American citizens = dumbass
Most people on internet = dumbass


:explosion
Click to expand...
 
You are damned good at jumping for the bait. I like that. :smoker:

scrappy again said:
Well ya know.. I do what I can. :rof:
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98XJSport said:
When you run faster than the treadmill (which would make it a moving sidewalk) do you?

Yes. just not as much, or as fast.

Your also forgetting that an airplane doesn't get it's forward momentum from "pushing" against the ground. Therefore the treadmill is only going to give slight friction losses to the planes forward movement.

Look at it this way. The treadmill is running in one direction at 50mph. The plane is running in the opposite direction at 50 mph. It's standing still. It will not fly.

HOWEVER if the craft exceeds the speed of said treadmill, it will start moving. If it gets moving fast enough, it will fly.

Can they build a treadmill fast enough to match the plane's pace? Will things be stable at those speeds?

Those are the questions I have...
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If the plane is thethered it won't fly. In my uneducated opinion, the plane will, theoretically, be able to fly. However, whether or not they are able to perform the test in a way that doesn't result in a fiery death for their crash test dummy, that is a whole other question. :D The prop pulls on the air to move the plane. The wheels are just like the pontoons for a waterplane. They give it something to sit on until it gets moving fast enough to fly. My initial thought was "No way" it'll go forwards but the treadmill wil keep it in the same spot. But as I thought about it, it became clear that it will indeed move forward - mostly - unhindered by the treadmill and take off. Again, though, that depends on the test itself. It could very easily go wrong and explode...
 
kubtastic said:
He didn't measure wheel speed. Airplane wheels exceeded speed of treadmill in both cases. FAIL.
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:roflmao: :roflmao:

Hopefully you were indeed joking as the Hotwheels'...wheels were unpowered much like a real plane, the wheels moved faster than the treadmill only because the plane's prop moved it...;)
 
BlackSport96 said:
:roflmao: :roflmao:

Hopefully you were indeed joking as the Hotwheels'...wheels were unpowered much like a real plane, the wheels moved faster than the treadmill only because the plane's prop moved it...;)
Click to expand...

He supplemented his research with a 2nd grader because that was the level of logic used in his "proof." That's all really - I criticize the process, not the result. The mathematical definition of "generalize" would help the video's creator.
 
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That cheezy ass tarp is gunna rip!

The pilot even thinks he's not gunna take off! Dumb ass!



Edit! The SOB Flew!


That pilot is a moron and shouldn't be able to fly!

BUSTED
 
Is this thread finally over now? It was entertaining for the first few pages, but damn, after 17 pages it makes me want to run head first into a wall.
 
party1:
Nice...I'm at work so I wasn't able to watch.
 
Um, I missed the episode....but I don't understand the premise still.

Is the theory that if the jet is on a treadmill it won't move?

or

Is the theory that a plane that has no wheel speed will not take off?

In either case the premise is wrong. If I'm understanding it correctly, the treadmill will only counteract wheel speed...but since the jet is propelled by air moved by a propeller or jet turbine, I don't see how a treadmill would affect it. It will just look like it's standing still as it continues to accellerate.

Anywho, I know its over, but I'm still not sure of the original argument...and yes, after reading 5 straight pages of nonsense, I started skipping through it.
 
SanDiegoXJ said:
after reading 5 straight pages of nonsense, I started skipping through it.
Click to expand...

:conceitedIt looks like you still have 13 more pages to read
 
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