Question: Will the plane fly? (warning: nerdy)

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Old Jan 30, 2008 | 04:49 PM
  #196  
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Originally Posted by Ipecac
Ok, so I get the arguement as to why it could take off, but I still have a question. Why do planes have wheels?
Umm... maybe so the bottom of the fuselage doesn't get ground away on the tarmac?

Sea planes don't have wheels, nor do bush planes in the winter (they have skis)


Originally Posted by Ipecac
According to your theory planes do not need wheels to take off.
Nope they really don't need wheels to take off, (see above references) but they do need them in order to move across solid ground at anything less than flight-speed.

Originally Posted by Ipecac
The treadmill would render the wheels effectively useless, meaning the plane would not roll forward.
.

If the wheels had any driving force behind them you would be right, but they don't, so the treadmill doesn't render them useless, they still keep the fuselage from grinding on, and getting beat up by the treadmill.
Old Jan 30, 2008 | 05:09 PM
  #197  
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Originally Posted by Racenut
You dummy, jet engines don't work under water! Duh?
sure they do. Hunt For Red October anyone?

Originally Posted by Ipecac
Ok, so I get the arguement as to why it could take off, but I still have a question. Why do planes have wheels?

According to your theory planes do not need wheels to take off.

The treadmill would render the wheels effectively useless, meaning the plane would not roll forward.
Looks ma, no wheels!


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Old Jan 30, 2008 | 05:13 PM
  #198  
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But, if the wheels are the contact point to the solid surface they would need to be moving forward to allow the plane to reach flight speed. If the treadmill could counteract the force of the wheel how would the plane reach flight speed?

Just for the record I do agree with you because I dont believe there is a treadmill type of device that would be able to adjust speeds enough to keep the plane from moving forward.

However, if, in theory, they could negate the contact point between the plane and the ground. The plane would never reach a speed that would allow it to create the lift needed to take off.

EX: if the plane was hooked to stilts, then run to "top speed" and let go. It would not take off.

The problem becomes the wheels. A plane wouldnt need them to take off, but because the plane has them it needs them as the contact point with the ground.
Old Jan 30, 2008 | 05:16 PM
  #199  
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Originally Posted by irrational x
sure they do. Hunt For Red October anyone?



Looks ma, no wheels!

think before you speak
I did, and Im not saying a plane needs them to take off. However, because it does have the wheels it needs them to function. If a treadmill can counter act the wheels the plane cant move forward.

I get that it is advanced logic, but I have thought this through, you just dont seem to understand that the wheels become a crutch.
Old Jan 30, 2008 | 05:17 PM
  #200  
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Originally Posted by Ipecac
But, if the wheels are the contact point to the solid surface they would need to be moving forward to allow the plane to reach flight speed. If the treadmill could counteract the force of the wheel how would the plane reach flight speed?

Just for the record I do agree with you because I dont believe there is a treadmill type of device that would be able to adjust speeds enough to keep the plane from moving forward.

However, if, in theory, they could negate the contact point between the plane and the ground. The plane would never reach a speed that would allow it to create the lift needed to take off.

EX: if the plane was hooked to stilts, then run to "top speed" and let go. It would not take off.

The problem becomes the wheels. A plane wouldnt need them to take off, but because the plane has them it needs them as the contact point with the ground.
i have highlighted the extract point where you became retarded. the only force the ground is exerting on the wheels and vice versa is vertical, IE, weight of the plane in newtons. theres is no drive force in the tires on the plane.
Old Jan 30, 2008 | 05:18 PM
  #201  
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Goddam....someone with mad tyte MS Paint skillz do up a Free Body Diagram!!!!!
Old Jan 30, 2008 | 05:20 PM
  #202  
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Originally Posted by Ipecac
I did, and Im not saying a plane needs them to take off. However, because it does have the wheels it needs them to function. If a treadmill can counter act the wheels the plane cant move forward.

I get that it is advanced logic, but I have thought this through, you just don't seem to understand that the wheels become a crutch.
if there is no force applied there is no force to "counteract". You just don't seem to understand that you argument is irrelevant because of this.
Old Jan 30, 2008 | 05:22 PM
  #203  
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And before any of you public skool flunkies attempt to bring up the idea that the wheels would spin toooo fast and fail...I bring you Tundra Tires!!!

Old Jan 30, 2008 | 05:22 PM
  #204  
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Originally Posted by irrational x
i have highlighted the extract point where you became retarded. the only force the ground is exerting on the wheels and vice versa is vertical, IE, weight of the plane in newtons. theres is no drive force in the tires on the plane.
Yes but a standard passanger jet functions on horizontal thrust, not vertical like a rocket would. The wheels become the rotating point for that thrust. If that thrust is counteracted through the wheels the plane wont move forward.

You dont need to go around calling me names. It makes you look foolish.
Old Jan 30, 2008 | 05:24 PM
  #205  
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AAAAhhhhhhhhhhhhhhhhhhhhh!!!!!!!!!!! The wheels don't factor into the problem.

Old Jan 30, 2008 | 05:24 PM
  #206  
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Originally Posted by Ipecac
Yes but a standard passanger jet functions on horizontal thrust, not vertical like a rocket would. The wheels become the rotating point for that thrust. If that thrust is counteracted through the wheels the plane wont move forward.

You dont need to go around calling me names. It makes you look foolish.
no they don't. what do i know, i only went to college for aerospace engineering
Old Jan 30, 2008 | 05:25 PM
  #207  
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Originally Posted by Ipecac
Yes but a standard passanger jet functions on horizontal thrust, not vertical like a rocket would. The wheels become the rotating point for that thrust. If that thrust is counteracted through the wheels the plane wont move forward.

You dont need to go around calling me names. It makes you look foolish.
NO!! The wheels ROTATE...thus no torque can be transmitted to the plane.
Old Jan 30, 2008 | 05:27 PM
  #208  
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Originally Posted by irrational x
if there is no force applied there is no force to "counteract". You just don't seem to understand that you argument is irrelevant because of this.
I understand that the wheels arent creating any force. However the engines are. The contact point between the plane and the ground is the wheels.

This becomes the point where the forward thrust of the engines is transfered. If this contact point is negated through a treadmill nothing allows the plane to move forward.
Old Jan 30, 2008 | 05:31 PM
  #209  
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Originally Posted by Ipecac
I understand that the wheels arent creating any force. However the engines are. The contact point between the plane and the ground is the wheels.

This becomes the point where the forward thrust of the engines is transfered. If this contact point is negated through a treadmill nothing allows the plane to move forward.
Do you believe that the earth is flat?
Old Jan 30, 2008 | 05:31 PM
  #210  
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The plane takes off. The force is acting on the air not the ground. The ground speed is irrelevant as to whether the plane will take off. It's airspeed that determines if a plane takes off.



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