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View Poll Results: what do you think?
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your both wrong its a vto
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will the plane fly?

Old Nov 26, 2005 | 09:49 AM
  #16  
Barry St John's Avatar
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Actually that would be a really safe plane as long as it stayed on the conveyor!!
Old Nov 26, 2005 | 10:22 AM
  #17  
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If the dozer is doing 5 mph then the track shouldn't be doing 10 mph (top or bottom)... unless it had a Cummins and was peeling out !!!

PISTOL
Old Nov 26, 2005 | 10:40 AM
  #18  
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Wait a minute, guys. The statement is the plane intends to take off. That means throttle to the metal. The plane is going to move forward and create air speed. If the plane takes off at 100 mph, when the plane reaches 100 it will lift off. Since the belt will run at the speed of the wheels, the only difference is the wheels will be turning 200 mph instead of 100 as it lifts off.

This is just opposite of the plane sitting on a flatbed truck that accellerates to 100 with the plane sitting on it. Bring the prop up to speed, pull the stick back and take off - - the difference is the wheels are not turning at all.
Old Nov 26, 2005 | 11:12 AM
  #19  
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I am assuming that in the plane puzzle that the conveyour is meant to keep the plane from moving...in that case since the plane is not moving (in relationship to the ground) so the plane will not take off, since it is not moving...it has no air traveling over the wings to produce the lift needed to make the plane fly. It would be just as if the tires of the plane were mounted to the ground in such a way that the plane would not be able to move. The plane isnt going anywere. but in reality i would not think that a conveyour would keep the plane from taking off, the tires spinning faster that normal would cause make it a little harder for the plane to go, but regardless, the planes speed is based on the air around it, not the ground...since it does not use the tires as means of propultion, the plane would take off....eventually.

As far as the bulldozer goes, if the dozer is going at 5 MPH, then the track, while on top is moving forward at 10 MPH and the track while on bottom is moving at 0 MPH. Think about it....I am right!!
Old Nov 26, 2005 | 11:45 AM
  #20  
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"The conveyer belt is designed to exactly match the speed of the wheels at any given time, moving in the opposite direction of rotation."

If the plane is moving forward, the wheels, where they come in contact with the ground, will be moving towards the rear of the plane. If the conveyor is moving in the OPPOSITE direction, it means that it is actually propelling the plane forward.

Right?

RIGHT?

chaikwa.
Old Nov 26, 2005 | 11:47 AM
  #21  
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The conveyer belt is designed to exactly match the speed of the wheels at any given time, moving in the opposite direction of rotation
1) Match the speed of WHAT wheels?!? The PLANES wheels?? Or the conveyors OWN wheels?!?! Not specific, and there is the key!!!

2) the plane does not use tires for propulsion...

moving in the opposite direction of rotation
3) If the wheels are moving clockwise, the conveyor would be moving counterclockwise
SOLID GROUND MOVES THE OPPOSITE DIRCETION OF THE TIRES ANYWAY!!!

4) it doesnt matter anyway since the conveyor isnt doing anything....
The riddle says the conveyor was "DESIGNED" to move, didnt say "IT IS MOVING"

YES, the plane will take off






The bottom of the track move the same speed as the whole machine
Old Nov 26, 2005 | 12:21 PM
  #22  
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Originally Posted by Herrin821
1) Match the speed of WHAT wheels?!? The PLANES wheels?? Or the conveyors OWN wheels?!?! Not specific, and there is the key!!!

2) the plane does not use tires for propulsion...


3) If the wheels are moving clockwise, the conveyor would be moving counterclockwise
SOLID GROUND MOVES THE OPPOSITE DIRCETION OF THE TIRES ANYWAY!!!

4) it doesnt matter anyway since the conveyor isnt doing anything....
The riddle says the conveyor was "DESIGNED" to move, didnt say "IT IS MOVING"

YES, the plane will take off






The bottom of the track move the same speed as the whole machine

THANK YOU!!!
Old Nov 26, 2005 | 12:28 PM
  #23  
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Originally Posted by Begle1
10 MPH. (Did you type that one wrong, or are you being sarcastic?)
SORRY!!! The track on the bottom is NOT moving. All that is being done is the track is being laid down in front of the dozer, run over by said dozer, and it is being picked up and transported to the front of the dozer (hence the double speed).
Oh, the plane will take off due top the fact it does not depend on the tires for propulsion.
Old Nov 26, 2005 | 01:10 PM
  #24  
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Originally Posted by MnTom
Oh, the plane will take off due top the fact it does not depend on the tires for propulsion.
Good point! I knew that it didn't depend on the wheels for propulsion, but never thought about the mechanics of it. They'll just spin FASTER, but it won't have any effect on the plane taking off or not.

And you thought I was just a dumb janitor!

chaikwa.
Old Nov 26, 2005 | 01:41 PM
  #25  
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Originally Posted by chaikwa
Good point! I knew that it didn't depend on the wheels for propulsion, but never thought about the mechanics of it. They'll just spin FASTER, but it won't have any effect on the plane taking off or not.

And you thought I was just a dumb janitor!

chaikwa.
I already said this

Originally Posted by iker42
Yes It can take off....The Plane does not need air, It has jet turbines and is not powerd by the wheels, So technichly the plane can take off..
Old Nov 26, 2005 | 03:06 PM
  #26  
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I need more beer.
Old Nov 26, 2005 | 09:07 PM
  #27  
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the question has alot of what if's in it, but none the less if you do not have to proper amount of air going over the wing at the rotate speed the plane will not generate lift. i fly a beech a36 and a king air 200 both need air going over the wing to lift at rotate speed.
Old Nov 26, 2005 | 09:18 PM
  #28  
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Originally Posted by Geico266
*** Brain Teaser ***

Imagine an airplane is on the beginning of a massive conveyor belt, as wide and as long as a runway, and intends to take off. The conveyer belt is designed to exactly match the speed of the wheels at any given time, moving in the opposite direction of rotation.
There is no wind.

Can the plane take off?
I say no. If the conveyor is ALWAYS running at the same speed as the wheels...no matter what...then the thrust of the engines will never be able to overcome the "push" of the conveyor and the plane will never even move....much less get off the ground.
Old Nov 26, 2005 | 09:23 PM
  #29  
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Originally Posted by MnTom
OK, Here is another one: If a bulldozer is moving at a speed of 5mph the top of the track is moving at 10mph. How fast is the track on the bottom going?
0 mph. The bottom track of a dozer doesn't move. It just sits there while the "wheels" of the dozer roll over it.
Old Nov 26, 2005 | 09:42 PM
  #30  
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bunch of rocket scientists here huh??? no one said how fast these tires or conveyor belt was moving nor if even the turbines were moving. that being said no the plane wont take off. but theoretically the plane might take off if all the ingredients were there. now about the housefly on the ceiling, when it takes off to fly does it drop and roll or does it fly upside down then invert itself?

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