cantaloup63 said:The thrust of the engine would cause the plane to move forward regardless of what the wheels were on.
imamartian said:Or if, in the 'real' problem, instead of the engine's thrust you had a chain attached to the nose of the plane and the other end to a giant winch... if you turned the winch, it's guaranteed that the planed would move forwards... again i can't work out what's happening with the wheels.
Once you pop, you just can't stop
cantaloup63 said:The thrust of the engine would cause the plane to move forward regardless of what the wheels were on.
No it won't. There is a second force coming through the wheel bearings which exactly balances the engine's thrust.
imamartian said:Or if, in the 'real' problem, instead of the engine's thrust you had a chain attached to the nose of the plane and the other end to a giant winch... if you turned the winch, it's guaranteed that the planed would move forwards... again i can't work out what's happening with the wheels.
It makes no difference if you replace the engine with a winch. No matter how hard you pull, the conveyor is pre-programmed to apply an equal and opposite tangential force to the tyres. The combined effect of your winch, acting through the bearings, and the conveyor acting on the tyres will cause the wheels' angular momentum to increase WITHOUT LIMIT. To make this work, we have to make a number of unrealistic assumptions:
1) The wheels are strong enough to hold together as their circumferential velocity approaches light speed.
2) The force of the engine/winch does not exceed the grip of the tyres on the conveyor. (Replace them with pinions on a rack gear if you like.)
3) The force from the engine/winch is in line with the surface of the conveyor - otherwise the plane will nose-dive.
Trust me, the physics is correct.
That is a very serious allegation which Herr Ratzinger can't possibly ask the police to investigate, in the interest of the ChurchOnce you pop, you just can't stop
........Said the priest to the choirboy.
Please guy and gals, stop this madness !! lol there are a ton of wind up merchants on here, there are also many people who can't grasp this theory, and get confused on the forces involved on the ground and air. Let it lie chaps, you will only self combust otherwise
My reasoning of the problem is as follows...
Firstly to those who believe that the plane will not move, because the conveyor prevents forward movement, think of this.
The conveyor REACTS to wheel movement, wheel movement is caused by FORWARD movement of the plane, so the only way the conveyor can ever move is if the plane moves FORWARD.
If the plane ever stops, so must the conveyor.
Theoretically.... the plane will have no problem in taking off, as Newtons third law of motion is all you need to understand.
Practically.... it would probably self destruct on the conveyor.
imamartian said:would the wheels be 'slipping' on the treadmill
Norcon said:where would one find a bearing that can apply a force similar to an aircrafts engine and subsequent thrust?
trazor said:The conveyor REACTS to wheel movement, wheel movement is caused by FORWARD movement of the plane, so the only way the conveyor can ever move is if the plane moves FORWARD.
imamartian said:where does the engine thrust go?
Doitall wrote
the wheels turning at 500 miles an hour on a conveyor
How do wheels turn at 500 mile per hour?
"Mile per hour" is distance travelled. Wheels turning is "rpm".
With the greatest respect, if you don't like this topic, go and chat about something else... you wouldn't go into a boozer and tell a group of people to stop talking about something you were bored with...