Answer this question...
wont take off... a plane need thrust(counter acts drag) AND lift(ounter act wheight/gravity) in order to take off. thrus will be generated by the engiens even if on a belt. however lift is only generated by aerodynamics and most of it is created by a wing passing through the air or the air must be moving around a stationary wing, one or the other.
so in your example it wont take of... however if a giant fan is added in then it could!
so in your example it wont take of... however if a giant fan is added in then it could!
Originally Posted by b00gers
http://forum.physorg.com/index.php?showtopic=2417&st=0
http://forums.offtopic.com/showthread.php?t=2179616
If you have time to sort through the mumble jumbo :dunno:
h:
http://forums.offtopic.com/showthread.php?t=2179616
If you have time to sort through the mumble jumbo :dunno:
h::wavey:
Originally Posted by [Damnit]
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anyone thinking otherwise is a dumb ass, the only thing moving are the wheels. there is no air flow under the wings to create the lift for takeoff, end of thread
h:
anyone thinking otherwise is a dumb ass, the only thing moving are the wheels. there is no air flow under the wings to create the lift for takeoff, end of thread
h:
Originally Posted by Kestrel
For a plane with perfect bearings and tires, take off is unaffected. For a plane with real bearings and tires, the plane will take off a little more slowly. Unless it's a hang glider or one of those funky gliders with powered wheels, then my original answer stands
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Originally Posted by Highmile
Did people acctually say no?
I believe it pretty much sums up the two schools of thought presented in this thread.
Originally Posted by Highmile
...The guy who talked about friction in the wheel bearings had a point and there would be a certain amount of attraction or stickyness of the tires to the belt (surface tension), but as they spin faster and faster, they would over come that attraction to each other as they expand from centrifugal force (drag tires increase their diameter as the car launches) and push the plane away from the belt...
The runway belt that advances at the plane represents a frictionless surface for the tires to sit on. A ice covered runway, or a lake (tons of friction really and more of a problem than a runway belt matching the attempted speed of a plane) could be substituted in your mind to help you realize how rediculous this is.
My final answer is Yes, the plane will be able to run up and take off, even if the belt is going twice as fast as the plane in the opposite direction. Oh no I didn't.
The runway belt that advances at the plane represents a frictionless surface for the tires to sit on. A ice covered runway, or a lake (tons of friction really and more of a problem than a runway belt matching the attempted speed of a plane) could be substituted in your mind to help you realize how rediculous this is.
My final answer is Yes, the plane will be able to run up and take off, even if the belt is going twice as fast as the plane in the opposite direction. Oh no I didn't.
Group 3: People who think it DEPENDS
These people believe that one would have to do more research into the design of airplanes and the maximum capabilities of their individual components. There is not enough information in the original question to make an outright decision without further time invested.
Oh and it's spelled ridiculous.
Do planes require friction between the tires and the ground to move forward? Cars obviously do, but does it work the same way for planes (or other vehicles that use thrust, rather then driven wheels to move)?


