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-   -   The "Plane on a Treadmill" Question (http://cellar.org/showthread.php?t=12670)

Shawnee123 01-31-2008 11:36 AM
OK, reading all this makes my brain hurt.

What did Mythbusters say?

busterb 01-31-2008 11:41 AM
Quote:
Originally Posted by Shawnee123 (Post 428805)
OK, reading all this makes my brain hurt.

What did Mythbusters say?
Yah. Me too. I was busy assembling my new treadmill from bigbox mart and missed the show. What fun. Not.

Spexxvet 01-31-2008 11:45 AM
The plane took off.

Shawnee123 01-31-2008 11:46 AM
Quote:
Originally Posted by busterb (Post 428807)
Yah. Me too. I was busy assembling my new treadmill from bigbox mart and missed the show. What fun. Not.
:lol: I bet the plane is going to be even harder to assemble.

Flint 01-31-2008 11:47 AM
Quote:
Originally Posted by Flint (Post 428565)
When Mythbusters tests this scenario, I will be curious to see what is tested. Because the question as stated here isn't something you can test.
Quote:
Originally Posted by Episode 97: Airplane on a Conveyor Belt
An airplane cannot take off from a runway which is moving backwards (like a treadmill) at a speed equal to its normal ground speed during takeoff.
Busted. I love how they phrased the question so they could bust it. If the myth had been "the plane can take off" it would have been confirmed.

Shawnee123 01-31-2008 11:47 AM
Quote:
Originally Posted by Spexxvet (Post 428811)
The plane took off.
So, why is there still an argument?[/horrible tailposting]

Wtf? The plane was moving forward...so the treadmill wasn't equal to the plane? Well duh, it's not stationary as the original question seemed to suggest, of course it will take off, it will just take the wheels longer to get up to speed.

:bolt:

Happy Monkey 01-31-2008 12:02 PM
Quote:
Originally Posted by Shawnee123 (Post 428815)
Wtf? The plane was moving forward...so the treadmill wasn't equal to the plane?
It was moving backward relative to the ground at the same speed the plane was moving forward relative to the ground.
Quote:
Well duh, it's not stationary as the original question seemed to suggest,
That was the trick in the trick question- it seems to suggest that the plane will be stationary, but doesn't actually say so.
Quote:
of course it will take off, it will just take the wheels longer to get up to speed.
No. The wheels actually move twice as fast.

classicman 01-31-2008 12:04 PM
After viewing that video, I am no longer willing to concede......

I think

Happy Monkey 01-31-2008 12:07 PM
Quote:
Originally Posted by Flint (Post 428814)
Busted. I love how they phrased the question so they could bust it. If the myth had been "the plane can take off" it would have been confirmed.
Right. "Plane can't take off": Busted. "Plane can take off": Confirmed.

Shawnee123 01-31-2008 12:08 PM
All a little anti-climactic if'n you ask me. All the wasted popcorn. ;)

Flint 01-31-2008 12:18 PM
Quote:
Originally Posted by Flint (Post 428814)
Busted. I love how they phrased the question so they could bust it. If the myth had been "the plane can take off" it would have been confirmed.
Quote:
Originally Posted by Happy Monkey (Post 428826)
Right. "Plane can't take off": Busted. "Plane can take off": Confirmed.
Right. This is usually a question: "Can a plane on a treadmill take off?"
But since they are the mythbusters they phrased it so they could score a "bust."

Also (separate point here) they phrased the scenario to specify "ground speed."

Spexxvet 01-31-2008 12:19 PM
They ran the treadmill at takeoff velocity (25 mph). I wonder what the result would have been if they ran the treadmill at the plane's maximum velocity.

Flint 01-31-2008 12:22 PM
Quote:
Originally Posted by Spexxvet (Post 428834)
They ran the treadmill at takeoff velocity (25 mph). I wonder what the result would have been if they ran the treadmill at the plane's maximum velocity.
If enough viewers complain about their testing methods, they will revisit the myth. Sometimes they're wrong. I'd say this one is still wide open!

HA HA HA HA HA HA HA HA HA HA HA HA HA HA HA HA HA HA HA HA HA HA ha ha ha ha ha ha ha :::groan:::

Happy Monkey 01-31-2008 12:39 PM
Quote:
Originally Posted by Spexxvet (Post 428834)
They ran the treadmill at takeoff velocity (25 mph). I wonder what the result would have been if they ran the treadmill at the plane's maximum velocity.
The same thing. For axle friction to noticeably slow the plane would require a treadmill moving at unimaginable speed. Now that I think of it, a treadmill moving fast enough to slow the plane might even cause enough of a wind-tunnel effect to counteract that friction.

glatt 01-31-2008 12:50 PM
Quote:
Originally Posted by Happy Monkey (Post 428840)
The same thing.
Not quite exactly the same thing, they would need a longer strip of fabric. [/nitpick]


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