Author Topic: Airplane on a Conveyor Belt...  (Read 30430 times)

Offline AKIron

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« Reply #75 on: January 31, 2008, 03:17:42 PM »
Quote
Originally posted by Russian
http://uk.youtube.com/watch?v=IbRcg3ji_Pc

here's video in question .....


Thanks.
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Offline AKIron

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« Reply #76 on: January 31, 2008, 03:18:24 PM »
Quote
Originally posted by Treize69
Yes, and I've now said THREE times that it got off well before the end.

I am typing in English right? I get distracted sometimes.


Sheesh, talk about stubborness.
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Offline VERTEX

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« Reply #77 on: January 31, 2008, 03:33:51 PM »
Quote
Originally posted by Curval


 

 

"I posted here just to bunch up people's panties."

I hope this major intardnet victory makes you feel really great about yourselves.


You took a position in an arguement, you had no convictions on, just to rile people?

Get a life.

Offline Curval

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« Reply #78 on: January 31, 2008, 03:39:08 PM »
Quote
Originally posted by VERTEX
Quote
Originally posted by Curval


 

 

"I posted here just to bunch up people's panties."

I hope this major intardnet victory makes you feel really great about yourselves.


You took a position in an arguement, you had no convictions on, just to rile people?

Get a life. [/B]


LOL

If you look and see how many posts I have you would have already figured out I don't have much of a life.

Freaking newb.

:lol
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Offline VERTEX

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« Reply #79 on: January 31, 2008, 03:54:28 PM »
So now we resort to name calling.

I just don't understand taking a particular side of a discussion just to annoy.

Offline WilldCrd

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« Reply #80 on: January 31, 2008, 03:58:07 PM »
Quote
Originally posted by VERTEX
So now we resort to name calling.

I just don't understand taking a particular side of a discussion just to annoy.



You must be new around these parts.
We do this JUST to argue at times. Sometimes its more serious, usually some take the opposite side just to be part of the argument. Its a continuous dynamic kinda thing. After you have been here awhile you may understand.



p.s. ya "might" wanna go out and buy a flame retardant suit first :D
Crap now I gotta redo my cool sig.....crap!!! I cant remeber how to do it all !!!!!

Offline Curval

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« Reply #81 on: January 31, 2008, 04:00:26 PM »
Quote
Originally posted by WilldCrd
You must be new around these parts.
We do this JUST to argue at times. Sometimes its more serious, usually some take the opposite side just to be part of the argument. Its a continuous dynamic kinda thing. After you have been here awhile you may understand.



p.s. ya "might" wanna go out and buy a flame retardant suit first :D


What he said.

After telling me to "Get a life" you claim that I am name calling?

Good for you...you are starting to *get it*.

:aok :rofl
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Offline Yknurd

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« Reply #82 on: January 31, 2008, 04:06:07 PM »
The real funny thing is that this "argument" serves no purpose.

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Offline VERTEX

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« Reply #83 on: January 31, 2008, 04:06:18 PM »
In that case;

Any experiments shown to date, which demonstrate the ability of an airplane to take off normally while on a conveyor traveling in the opposite direction are clearly conspiracies of the worst kind meant to deliberately deceive an otherwise well informed public.

Offline eskimo2

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« Reply #84 on: January 31, 2008, 04:10:42 PM »
Quote
Originally posted by Treize69
I know what you're asking, and the belt had no effect at all. Just like it didn't with the R/C plane, and just like anyone with brain in their heads would know it wouldn't.

God, can't we let this pointless argument die??? Its a stupid idea, it was a waste of an episode, and its a rediculous thing to keep going over ad nauseum. Either you get it or you don't, and it absolutely rediculous how many people do not, and will not, EVER understand it.

The ignorance and stubbornness of people never ceases to disturb me.


Quote
Originally posted by Treize69
...and the belt had no effect at all.


So many folks insist that they are so smart; yet not one of them can answer or even comprehend the very question that will force them to view the problem in a new light:

Here’s a story that simplifies the problem: (Note that the term wheels in this story refers to wheels and tires)

Identical triplets Al, Bob and Chuck buy three identical bush planes. Since they live in Alaska, all three brothers buy and install large balloon “tundra tires” and wheels. The wheels, planes and brothers are identical. All three planes will take off from a normal runway in exactly 100 feet and at exactly 50 mph. The brothers fly their planes to an air show in Wisconsin. At the air show Bob finds and buys a set of fantastic wheels. These wheels are exactly like the wheels he has on his plane in every way except they have half the mass. Their mass is distributed in the same proportion as the wheels that he plans on replacing. Al thinks Bob is silly and is content with his old wheels. Bob thinks that Al will eventually want a set, so he buys a second set to give to Al on their birthday.

Bob finds a buyer for his old heavy wheels and installs a set of his new lightweight ones. He loads the second set into his plane so that it is balanced just as it was before. Bob’s plane now weighs exactly the same as Al’s and Chuck’s, but its wheels have half the mass.

Meanwhile, Chuck runs into a magician who sells him a set of magic wheels. These wheels are exactly like the wheels he has on his plane in every way except they have no mass. Chuck installs his magic wheels. He loads his old set into his plane so that it is balanced just as it was before. Chuck’s plane now weighs exactly the same as Al’s and Bob’s, but its wheels have no mass.

When the brothers leave the air show they request a formation take off. They line up wing tip to wing tip and apply power at exactly the same time. All three planes weigh exactly the same and must hit 50 mph to lift off. When Chuck’s plane lifts off his wheels stop spinning instantly since they have no mass. Since they have no mass, they also have no rotational inertia. When Al’s plane lifts off his heavy wheels are spinning at 50 mph and have considerable rotational inertia. When Bob’s plane lifts off his half-weight wheels are spinning at 50 mph and have exactly half the rotational inertia as Al’s wheels.

Where did the rotational inertia and energy in Bob’s and Al’s wheels come from?
How did the rotational inertia and energy now stored in Bob’s and Al’s wheels affect the take off distance of their planes?
We know that Al’s plane will still take off in exactly 100 feet; where will Bob’s and Chuck’s planes take off?

Offline Curval

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« Reply #85 on: January 31, 2008, 04:10:46 PM »
Quote
Originally posted by VERTEX
In that case;

Any experiments shown to date, which demonstrate the ability of an airplane to take off normally while on a conveyor traveling in the opposite direction are clearly conspiracies of the worst kind meant to deliberately deceive an otherwise well informed public.


They are indeed.  Well said.

I suspect this guy is going to fit right in.:aok
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Offline rabbidrabbit

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« Reply #86 on: January 31, 2008, 04:33:28 PM »
Quote
Originally posted by eskimo2
So many folks insist that they are so smart; yet not one of them can answer or even comprehend the very question that will force them to view the problem in a new light:

Here’s a story that simplifies the problem: (Note that the term wheels in this story refers to wheels and tires)

Identical triplets Al, Bob and Chuck buy three identical bush planes. Since they live in Alaska, all three brothers buy and install large balloon “tundra tires” and wheels. The wheels, planes and brothers are identical. All three planes will take off from a normal runway in exactly 100 feet and at exactly 50 mph. The brothers fly their planes to an air show in Wisconsin. At the air show Bob finds and buys a set of fantastic wheels. These wheels are exactly like the wheels he has on his plane in every way except they have half the mass. Their mass is distributed in the same proportion as the wheels that he plans on replacing. Al thinks Bob is silly and is content with his old wheels. Bob thinks that Al will eventually want a set, so he buys a second set to give to Al on their birthday.

Bob finds a buyer for his old heavy wheels and installs a set of his new lightweight ones. He loads the second set into his plane so that it is balanced just as it was before. Bob’s plane now weighs exactly the same as Al’s and Chuck’s, but its wheels have half the mass.

Meanwhile, Chuck runs into a magician who sells him a set of magic wheels. These wheels are exactly like the wheels he has on his plane in every way except they have no mass. Chuck installs his magic wheels. He loads his old set into his plane so that it is balanced just as it was before. Chuck’s plane now weighs exactly the same as Al’s and Bob’s, but its wheels have no mass.

When the brothers leave the air show they request a formation take off. They line up wing tip to wing tip and apply power at exactly the same time. All three planes weigh exactly the same and must hit 50 mph to lift off. When Chuck’s plane lifts off his wheels stop spinning instantly since they have no mass. Since they have no mass, they also have no rotational inertia. When Al’s plane lifts off his heavy wheels are spinning at 50 mph and have considerable rotational inertia. When Bob’s plane lifts off his half-weight wheels are spinning at 50 mph and have exactly half the rotational inertia as Al’s wheels.

Where did the rotational inertia and energy in Bob’s and Al’s wheels come from?
How did the rotational inertia and energy now stored in Bob’s and Al’s wheels affect the take off distance of their planes?
We know that Al’s plane will still take off in exactly 100 feet; where will Bob’s and Chuck’s planes take off?


In this case we don't know the mass of the original wheels so a calculation is impossible.  However, a relationship can.

The rotational force needed for Bob and Al's wheels are taken as an initial  and inertial resistance force that detracts from thrust.

From that we assume they will take less than 100 ft to take off with Bob being 100-x and Al being 100-2x less.  X being the force imparted on Bob's wheels to rotate them up to 50mph.

Offline john9001

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« Reply #87 on: January 31, 2008, 04:46:05 PM »
eskimo2, i think you are putting too much emphasis on the amount of energy required to spin a wheel, but to answer your question, bob's plane will take off in 99 feet and 11 inches and chucks plane will take off in 99 feet and 10.5 inches.

Offline eskimo2

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« Reply #88 on: January 31, 2008, 04:47:27 PM »
Quote
Originally posted by rabbidrabbit
In this case we don't know the mass of the original wheels so a calculation is impossible.  However, a relationship can.

The rotational force needed for Bob and Al's wheels are taken as an initial  and inertial resistance force that detracts from thrust.

From that we assume they will take less than 100 ft to take off with Bob being 100-x and Al being 100-2x less.  X being the force imparted on Bob's wheels to rotate them up to 50mph.


Bravo!

Now, are you ever going to explain where you got the version of the original AH BBS thread from?  Where did “the conveyor exactly matches the plane’s wheel’s speed” twist come from?

Offline rabbidrabbit

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« Reply #89 on: January 31, 2008, 04:52:53 PM »
Me.

I'm just that fricken evil.