Brain Teaser - Will it take off??
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Originally Posted by Stealth
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.
Last edited by styxnpicks; Feb 2, 2008 at 02:38 PM.
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Originally Posted by Stealth
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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Originally Posted by styxnpicks
yes you ARE the stubborn one, because you are not fully comprehending the way the myth is worded. your just to proud to realize it, kinda funny cause you REALLY look stupid right now, bacuse you don't realize that in order for the belt to move backwards the plane HAS TO MOVE FORWARD that is the way the myth is worded , look at it again. if the plane moves forward... the belt moves the same speed and distance in the opposite direction. and if you understood the forces you would know that the force of drag involved here is WAY less than the force of thrust
Originally Posted by OP
"A plane is standing on a runway that can move (some sort of band conveyer). The plane moves in one direction, while the conveyer moves in the opposite direction. This conveyer has a control system that tracks the plane speed and tunes the speed of the conveyer to be exactly the same (but in opposite direction)."
"A plane is standing on a runway that can move (some sort of band conveyer). The plane moves in one direction, while the conveyer moves in the opposite direction. This conveyer has a control system that tracks the plane speed and tunes the speed of the conveyer to be exactly the same (but in opposite direction)."
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Originally Posted by Stealth
It seems you are confused. The belt moves backwards, see below.
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Originally Posted by styxnpicks
and if you understood the forces you would know that the force of drag involved here is WAY less than the force of thrust
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Originally Posted by styxnpicks
so what don't you understand about the belt moving the same speed as the plane in the oposite direction?
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Originally Posted by scott1981
Exactly, The wheel bearings are the only items transferring the speed of the conveyer belt to the plane. Mythbusters just did this and the plane took off
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Originally Posted by Stealth
I understand it completely. The speeds are cancalling each other out, therefore the plane is wasting forward energy, and not moving.
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Originally Posted by Stealth
So why don't they use this conveyor ststem technology on any aircraft carriers?
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Originally Posted by Net Wurker
Because if a plane needs 500 feet to take off from a fixed runway, then it will need 500 feet to take off from a conveyor runway. What would be the point of adding a complicated conveyor runway?
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Originally Posted by Stealth
Ecactly.
an no we are NOT tring to make it seem like the plane can be sitting still and just take off conventionally only because of engine thrust
bacause the PLANE WILL NOT SIT STILL!!!!!! it WILL move forward in relation to the earth
Last edited by styxnpicks; Feb 2, 2008 at 02:58 PM.
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Originally Posted by styxnpicks
... thats 500ft true ground speed in relation to the earth. it would take 1000ft of "belt" runway,
an no we are NOT tring to make it seem like the plane can be sitting still and just take off conventionally only because of engine thrust
bacause the PLANE WILL NOT SIT STILL!!!!!! it WILL move forward in relation to the earth
an no we are NOT tring to make it seem like the plane can be sitting still and just take off conventionally only because of engine thrust
bacause the PLANE WILL NOT SIT STILL!!!!!! it WILL move forward in relation to the earth
Last edited by Stealth; Feb 2, 2008 at 03:01 PM.
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Originally Posted by Stealth
Yeah, because it's doubled, it is a belt.
watch this from 7:50 till the end and you will totally understand
http://www.youtube.com/watch?v=MuXK1...eature=related
