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Open ForumsThe Open forum was created for people to discuss anything else Non-Moto related. Just about anything goes! Please remember this is a loosely moderated area. If you do not have thick skin. We suggest you stay out of here.
Since after reading all this I have it figured out I will try to explain it to those who think it wont take off.
The plane is sitting still, the ground is still...as the plane increases its power the prop/jet engine will be pushing the air and providing the plane with forward movement. As it starts to move forward the belt moves in the opposite direction...but its irrelevant because a airplanes power comes from the prop/jet and not the wheels. So the plane will continue to accelerate and take off.
Since after reading all this I have it figured out I will try to explain it to those who think it wont take off.
The plane is sitting still, the ground is still...as the plane increases its power the prop/jet engine will be pushing the air and providing the plane with forward movement. As it starts to move forward the belt moves in the opposite direction...but its irrelevant because a airplanes power comes from the prop/jet and not the wheels. So the plane will continue to accelerate and take off.
Naysayer:
"But but but... the wheels going backward at the same rate!!
Ok, the key here is that the conveyor is matching the PLANE's speed and not the WHEELS' speed. It must be assumed the wheels of the plane are relatively frictionless. If the plane is traveling at 100 mph to the left, the conveyor will travel 100 mph to the right. This means that the wheels are spinning at 200 mph. The wheels don't drive the plane and don't control it's movement in any way. They are simply frictionless bearings between two surfaces. So, since they're frictionless, one surface can be moving at any velocity and have no effect on the other surface. So the plane can still move at 100 mph to the left without being affected by the conveyor moving 100 mph in the opposite direction. So yes, the plane will take off.
If you say that the conveyor matches the speed of the wheels, there is a physical restraint on the system that says the plane has 0 relative velocity and cannot takeoff.
good way of attacking the semantics but nothing is frictionless unless its a particle in total vacuum therefore no it wont take off
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engineers make that assumption to simplify the math....in this case, since the wheel velocity is irrelevant, assuming a frictionless wheel bearing is a valid assumption. although, it does nothing to support the hypothesis.
good way of attacking the semantics but nothing is frictionless unless its a particle in total vacuum therefore no it wont take off
There's also no such thing as a conveyor belt the size of a runway that can magically match the velocity of a plane. In any case, the wheels don't need to be frictionless, they just need to produce friction lower than the thrust the plane's engine produces, something that's completely realistic.
There's also no such thing as a conveyor belt the size of a runway that can magically match the velocity of a plane. In any case, the wheels don't need to be frictionless, they just need to produce friction lower than the thrust the plane's engine produces, something that's completely realistic.
Exactly... how many times does one actually care when and where Train A will pass train B? These questions are there to make you think.
And I don't see why it's so hard for people to see that the plane will start to and continue to move forward.
Just one question...... Wouldn't the car's "ground speed" and it's "wheel speed" be the same???
No. The wheel speed (the speed measured by a typical speedometer) would be equal to the ground speed (the speed of the car relative to the ground) plus the treadmill speed relative to the ground.
I shouldn't have even posted to this thread. It's page 7 (30 posts per page on my settings) and people are still arguing. The internet is full of dumbasses.
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2005 Yamaha YZF600R with Yoshimura exhaust
2007 Yamaha YZ85
User CP> Edit Options> "Number of posts to show per page"
Yup.
I've got mine set to 40 I think.
It's nice not having to click to a different page quite so often.
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