Byron5184 said:Ah screw it. I know the right answer. Thats good enough for me
lol if what you wrote here before you edited then I'm afraid you don't know the right answer lol. I do hope you come back tomorrow tho and realise the error in your logic
Who's right?
- Thread starter gurusan
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lol if what you wrote here before you edited then I'm afraid you don't know the right answer lol. I do hope you come back tomorrow tho and realise the error in your logic
The body of the plane will be doing exactly the same as it would if the runway was a solid tarmac one, it would build up speed due to the engines and then take off when it is going fast enough, because of the air over wings creating lift.VIRII said:
On our conveyor belt, the wheels and ground would be different, and spinning like crazy, but as there is no force on the plane from the wheels, that makes no difference.
I got a D in GCSE Physics and i can still understand...
the conveyor belt going the same speed as the wheels in the opposite direction basically eqaul out the wheels force. so the wheels are producing no force in either direction... basically as though they aren't there in the first place.
if you have ever flown, you will notice the really fast speed that pushes you back into your seat when you take off? that isn't the wheels, thats the engines work, so therefore the engines will still push you forward if the wheels are there or not, therefore it WILL fly. as ATC Scuzi said
the conveyor belt going the same speed as the wheels in the opposite direction basically eqaul out the wheels force. so the wheels are producing no force in either direction... basically as though they aren't there in the first place.
if you have ever flown, you will notice the really fast speed that pushes you back into your seat when you take off? that isn't the wheels, thats the engines work, so therefore the engines will still push you forward if the wheels are there or not, therefore it WILL fly. as ATC Scuzi said
Jotun said:
The plane would gain velocity and when it had sufficient velocity there would be enough air passing over the wings to create enough lift to take off yes.
Some people seem to be suggesting that the conveyor would keep the plane in the same place but even so it would take off ..... I don't see how. No forward motion of the plane no lift no take off ...
If the wheels were set in concrete hence the plane could not move forward then no matter what thrust the plane would not take off. If it broke free of the concrete (landing gear snapped) it would not immediately rise into the air, it would begin to increase in velocity and move forward (on its magical spare wheels) and eventually take off.
Soldato
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How does this get to 6 pages?
Within a normal range of forces, the wheel speed and conveyor are irrelevant. They function to support the fuselage and act against mavity. The only dynamic force acting on the fuselage is the engine thrust. It acts against the air mass. For the airfoil to create lift it must be moving relative to the air for a pressure differential. So either the air moves or the wing does. At some point the thrust of the engine overcomes inertia (and friction if the wheels are stationary) and pushes the fuselage forward. Assuming the wheels are free to rotate. The surface speed of the conveyor will create a very very small drag force, transfered to the wheel strut via friction/tyre deformation. If thrust is greater than total drag, it moves forward. The relative air speed over the wing increases until the lift is greater than mavity and its flying.
Its no different to a prop plane flying backwards relative to the ground in a strong headwind. The wheels could be touching the earth, other than the friction from tyre deformation and air drag, no force is transmitted as drag to the plane. The tyre drag due to friction on a freely rotating wheel would be several orders of magnitude less than the engine thrust. For this drag to reach equilibrium with the engine thrust the rotation speed of the tyre would have to massive.
Within a normal range of forces, the wheel speed and conveyor are irrelevant. They function to support the fuselage and act against mavity. The only dynamic force acting on the fuselage is the engine thrust. It acts against the air mass. For the airfoil to create lift it must be moving relative to the air for a pressure differential. So either the air moves or the wing does. At some point the thrust of the engine overcomes inertia (and friction if the wheels are stationary) and pushes the fuselage forward. Assuming the wheels are free to rotate. The surface speed of the conveyor will create a very very small drag force, transfered to the wheel strut via friction/tyre deformation. If thrust is greater than total drag, it moves forward. The relative air speed over the wing increases until the lift is greater than mavity and its flying.
Its no different to a prop plane flying backwards relative to the ground in a strong headwind. The wheels could be touching the earth, other than the friction from tyre deformation and air drag, no force is transmitted as drag to the plane. The tyre drag due to friction on a freely rotating wheel would be several orders of magnitude less than the engine thrust. For this drag to reach equilibrium with the engine thrust the rotation speed of the tyre would have to massive.
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Scuzi and VIRII are right
Soldato
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Damn its moving fast.blighter said:
