Jan 30 -- Mythbusters vs. Plane on a Treadmill (finally!) - Page 7 - JeepForum.com

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post #91 of 447 Old 01-22-2008, 06:33 PM
CHRRRIS
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Quote:
Originally Posted by opiv
The plane will take off and then get stuck on the handles... the treadmill wins...
You said it yourself, the plane will take off.. So technically....... I win.

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post #92 of 447 Old 01-22-2008, 06:34 PM
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Quote:
Originally Posted by Kyoseki
Ah! But nobody said the treadmill had a catapult! *stir*



I don't think the Doolittle Raiders had catapults either...

I was simply pointing out that we use the physics (somewhat) of the treadmill problem everyday to launch aircraft from carriers.


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post #93 of 447 Old 01-22-2008, 06:37 PM
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Quote:
Originally Posted by Kyoseki
I can see where you're coming from, but if you're talking linear speed of the wheel then effectively you're talking about the forward velocity of the aircraft though.
Exactly...the linear speed of the wheel will always match the forward speed of the plane.

Either way, we all know in the spirit of this myth that they mean linear speed since rotational speed would break the question, so I would accept either question.
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post #94 of 447 Old 01-22-2008, 06:38 PM
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I understand perfectly where the plane takes off argument comes from. The propulsion does not come from the wheels. However the wheels need to spin for the plane to move forward right? The treadmill matches the speed of the plane correct? So as the plane tries to accelerate the treadmill speeds up. The plane tries to accelerate more, and the treadmill speeds up. Within seconds what you have is both the treadmill and wheels infinatly accelerating each trying to overcome the other.

So the real answer to the question, within seconds the tires are spinning at thousands of miles per hour since the entire thrust of those motors is doing nothing but spinning them. The tires catch fire, shred, or do something not good, the plane falls onto the convener belt and gets launched backwards at about 2000mph and you get a cool looking fireball.
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post #95 of 447 Old 01-22-2008, 06:42 PM
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Quote:
Originally Posted by pyro9862
I understand perfectly where the plane takes off argument comes from. The propulsion does not come from the wheels. However the wheels need to spin for the plane to move forward right?
No....it doesnt even need wheels...skis work just fine in lots of cases...
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post #96 of 447 Old 01-22-2008, 06:46 PM
Kyoseki
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Quote:
Originally Posted by SomeGuysName
Either way, we all know in the spirit of this myth that they mean linear speed since rotational speed would break the question, so I would accept either question.
Certainly in the classic problem, the question is about linear speed, but lecturers will tend to reword questions to see if you're paying attention, so it's important to answer the question that was actually asked instead of the one that's usually asked.

Due to lack of interest, tomorrow has been canceled
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post #97 of 447 Old 01-22-2008, 06:49 PM
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Quote:
Originally Posted by Kyoseki
Certainly in the classic problem, the question is about linear speed, but lecturers will tend to reword questions to see if you're paying attention, so it's important to answer the question that was actually asked instead of the one that's usually asked.
Yeah I know...that's just something I've heard them say when wording can come into play on a myth: "In the spirit of the myth blah blah blah" Yes, my humor skills suck...
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post #98 of 447 Old 01-22-2008, 07:23 PM Thread Starter
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I don't recall asking anyone whether they thought the plane would take off or not. I was just giving heads up for the show. There's plenty of other threads to be retarded in. <>
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post #99 of 447 Old 01-22-2008, 10:08 PM
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Quote:
Originally Posted by dz1087


Is that what I think it is, why it is! That is indeed a wake behind that boat, which means it's moving. Now, it seems to be moving in the same direction that the Hawkeye appears to be setup to take-off in. That would be almost the opposite to the argument presented here! Does the Navy know they can't possibly launch that plane cause it won't take off?

NO! Since both the ship AND plane will be moving forwards, it will break the speed of LIGHT upon launch and transport into the future (or past).
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post #100 of 447 Old 01-22-2008, 10:39 PM
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post #101 of 447 Old 01-22-2008, 10:42 PM
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Quote:
Originally Posted by pyro9862
I understand perfectly where the plane takes off argument comes from. The propulsion does not come from the wheels. However the wheels need to spin for the plane to move forward right? The treadmill matches the speed of the plane correct? So as the plane tries to accelerate the treadmill speeds up. The plane tries to accelerate more, and the treadmill speeds up. Within seconds what you have is both the treadmill and wheels infinatly accelerating each trying to overcome the other.

So the real answer to the question, within seconds the tires are spinning at thousands of miles per hour since the entire thrust of those motors is doing nothing but spinning them. The tires catch fire, shred, or do something not good, the plane falls onto the convener belt and gets launched backwards at about 2000mph and you get a cool looking fireball.
I guess it just can't be said enough...
freewheel
freewheel
freewheel
freewheel
freewheel
freewheel
freewheel
The wheels can spin until they explode, but since they're not tied to the object, they won't effect it.

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post #102 of 447 Old 01-22-2008, 11:19 PM
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Quote:
Originally Posted by Philip J Fry
I don't recall asking anyone whether they thought the plane would take off or not. I was just giving heads up for the show. There's plenty of other threads to be retarded in. <>
It was implied

Due to lack of interest, tomorrow has been canceled
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post #103 of 447 Old 01-23-2008, 12:29 AM
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That depends... What color is the plane?
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post #104 of 447 Old 01-23-2008, 06:30 AM
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Quote:
Originally Posted by MattTheMudder
That depends... What color is the plane?
and will peanuts be served?
It will take off but be about an hour late if they do the experiment at LaGuardia airport.

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post #105 of 447 Old 01-23-2008, 08:48 AM
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Quote:
Originally Posted by BS87
NO! Since both the ship AND plane will be moving forwards, it will break the speed of LIGHT upon launch and transport into the future (or past).

The carrier turns INTO the wind and goes to full speed to increse the wind speed over the wings of the aircraft. If they turned with the wind and went to full speed it is entirely possible the aircraft would not have sufficient lift to remain airborne at the end of the deck.

The propeller on planes generates forward movement (thrust) which in turn provides airspeed over the wings resulting in lift. The propeller alone does not generate enough air to provide lift. If you take away airflow over the wings the plane remains grounded.

Now, if you have enough thrust and you can ignore lift then anything can fly (ie rockets). So it is possible (esp with lightweight remote control aircraft) to use thrust rather than lift to "fly".
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