Brain Teaser - Will it take off??

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Old Feb 2, 2008 | 02:14 PM
  #226  
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Originally Posted by Stealth
You know, if this conveyor system actually worked then they would use it on aircraft carriers and not use the catapult system on aircraft carriers to launch jets from the flight deck. That's what makes this entire argument so hilarious.
Why so the plane would take as long to get off a carrier deck as it would on a land runway?
 
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Old Feb 2, 2008 | 02:17 PM
  #227  
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I know I'm coming in late, but I refuse to go back and read all the arguing. I know you people are smart.... It doesnt matter if the surface the plane on is moving forward, backwards or still the planes wheel bearings are the only thing that would transfer that force to the actual plane. The plane will take off like it always has
 
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Old Feb 2, 2008 | 02:17 PM
  #228  
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Originally Posted by Wookie
Why so the plane would take as long to get off a carrier deck as it would on a land runway?
No, the catapult launches it in a short area along with the engine's thrust.

When landing on a carrier deck the plane hooks on a catch cable which aids in stopping its momentum on the short deck.
 
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Old Feb 2, 2008 | 02:20 PM
  #229  
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So when a car is on a 4 wheel dyno how fast is the car going when the speedometer is reading 60 MPH? Answer, the car won't be moving at all. It will be sitting still.
 

Last edited by Stealth; Feb 2, 2008 at 02:23 PM.
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Old Feb 2, 2008 | 02:23 PM
  #230  
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Imagine a jetbike on a motorcycle dyno. How fast do you think the wheels will be spinning with the engine at full throttle? Answer, they won't be spinning at all, just the jet engine will be creating thrust.
 
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Old Feb 2, 2008 | 02:24 PM
  #231  
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Originally Posted by Stealth
So when a car is on a 4 wheel dyno how fast is the car going when the speedometer is reading 60 MPH?
0. Until the tires transfer power into fwd momentum your just wasting energy
 
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Old Feb 2, 2008 | 02:24 PM
  #232  
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Originally Posted by Stealth
So when a car is on a 4 wheel dyno how fast is the car going when the speedometer is reading 60 MPH?
60, but this is what you DONT UNDERSTAND, a car is not a plane, apples to oranges.
 
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Old Feb 2, 2008 | 02:26 PM
  #233  
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Originally Posted by styxnpicks
60, but this is what you DONT UNDERSTAND, a car is not a plane, apples to oranges.
It's the same principle. Sheez. I think your bilstiens rattled something loose.
 
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Old Feb 2, 2008 | 02:26 PM
  #234  
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Originally Posted by Stealth
Imagine a jetbike on a motorcycle dyno. How fast do you think the wheels will be spinning with the engine at full throttle? Answer, they won't be spinning at all, just the jet engine will be creating thrust.
Exactly, 2 different forms of propelsion. One is traction based, the other is not
 
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Old Feb 2, 2008 | 02:26 PM
  #235  
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Originally Posted by Stealth
You cannot understand the obvious logic involved here, that is the problem.

A plane cannot fly if there are no aerodynamics present.
your logic is wrong, but you are to stubborn and proud to realize this, and the sad thing is the more you ramble on trying to prove you point the dumber you look, because you are not looking at all the forces in play here
 
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Old Feb 2, 2008 | 02:27 PM
  #236  
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Originally Posted by scott1981
0. Until the tires transfer power into fwd momentum your just wasting energy
Same as the jet on the conveyor system. The plane will be going 0. It won't take off.
 
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Old Feb 2, 2008 | 02:29 PM
  #237  
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Originally Posted by Stealth
It's the same principle. Sheez. I think your bilstiens rattled something loose.
it is NOT the same pricipal, NOT AT ALL, this is why you dont get it, you just fail to see your error
 
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Old Feb 2, 2008 | 02:30 PM
  #238  
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Originally Posted by styxnpicks
your logic is wrong, but you are to stubborn and proud to realize this, and the sad thing is the more you ramble on trying to prove you point the dumber you look, because you are not looking at all the forces in play here
There are many forces at play here. Thrust, gravity and aerodynamics, along with the conveyor rotating opposite of the wheel speed. The conveyor is simulating the movement of the ground as the thrust of the engine pushes the plane forward, but the plane isn't actually moving forward, so there are no aerodynamics on the wings, so it won't fly. I'm not the stubborn one here.
 
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Old Feb 2, 2008 | 02:31 PM
  #239  
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Originally Posted by Stealth
Same as the jet on the conveyor system. The plane will be going 0. It won't take off.
The conveyor would not effect a plane. The bearings are made to roll freely and will not transfer movement to a plane. The planes tires will just free roll 2x the speed of the planes actual speed until it takes off.
 
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Old Feb 2, 2008 | 02:32 PM
  #240  
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Originally Posted by scott1981
The conveyor would not effect a plane. The bearings are made to roll freely and will not transfer movement to a plane. The planes tires will just free roll 2x the speed of the planes actual speed until it takes off.
Not if the conveyor is matching the ground speed, which the thrust of the engine is creatingi, pushing the plane forward. That's the whole argument, the conveyor matching the jet's ground speed.
 
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