A plane on a treadmill - physics question

I remember this one lol. Short answer is yes, the wheels are basically irrelevant.

 

As long as it can create lift the plane will fly. If the belt was moving in the same direction at the same speed then the plane would be standing still right? Moving in the opposite direction I guess still moves the plane.

 

Of course not....if the plane is not moving then there is no forward thrust...then there is no air moving under the wings to create lift...therefore it sits there making a lot of noise and going nowhere, or so you might think...
but the reality is that the wheels only allow the plane to roll on the ground and are not providing that forward thrust like the wheels of a car might do, so the plane will move forward right off the conveyor and take off

 

Who drew that stupid plane ?? That's an even better question.

Can a man living east of the Mississippi River be buried west of the Mississippi River ??​

 

Well, I looked it up and now my head exploded. I'm going back to my table to mindlessly weed letters and try to repair my brain.

 

The plane will not fly. It will fall off the end of the belt. No one said the plane's engines were even on. And correct, the wheels are irrelevant.

 

It's all about the speed of the air passing over/under the wing so the real question is - what would happen if they tried this on the moon.....

 

"I'll take goofy questions for $500".
Airplane wheels only move when the plan's engines have thrust to push the plane forward. Unlike a car that has a drive shaft to the differential and axle.
So the conveyor belt would move the plane backwards.
For the belt and wheels to be going same speed it would be landing.

 

https://jalopnik.com/here-s-the-actual-science-behind-that-plane-takeoff-mem-1797763299

 

Wow, it's mighty good that the steer wheel didn't snag a hole in the mother-of-all-conveyor belts and tumble arse over tea kettle.


JB

 

Nope.
Plane uses jet/prop to move pull itself through the air. The wings generate lift, but not without forward motion. The wheels keep the bottom parts from dragging on the ground, that's pretty much it. Landing on a larger jet does not even utilize breaks, the loud squawk when the wheels hit the ground is them going from 0 to 500 mph instantly (idk how fast jets land).
So if a plane is setting on a treadmill, starting from 0 miles an hour, and the thrust of the engines brings it up to what would be 10 miles an hour, then the magic treadmill would be also going 10 miles an hour backwards, but the wheels would be clocking 20 mph as they spun first from the treadmill and then second from the jet engine moving the plane through the air forward.
*assuming zero friction.

 

A plane that takes off on the water has no wheels, a glider is pull by another plane to get lift.
Chuck Yeager was in a plane that was drop from another plane to break the sound barrier for the first time.

 

To translate into sign-language:
Could Eric, The Vector Doctor, vectorize that drawing before the hypothetical 747 generated enough forward speed to lift off the treadmill?

 

How about imagining a set of wheels with no friction. How would the treadmill move the plane backwards, if the wheel just spun when the treadmill was turned on. Now, throw a jetpack onto that plane. It will go forward due to the jetpack, and the wheel with no friction will do its thing and spin away.
The plane works the same way, because the jet overcomes the friction of the wheels by some incredible factor.

 

This more reminds me of the time I tried to figure out how to erect a 100' pole without a crane, just pulleys and a pivot on the pole... This still keeps me up at night