[Chili Palmer]

Originally Posted by Hits 'em Hard

So the treadmill moving that fast causes problems, but not the fact that getting a plane on a treadmill in the first place isn’t? We’re talking mostly theoretical here. But to sit there and say that a plane with zero airspeed will take off is absurd. What’s even more absurd seems to be your understanding of physics. The friction of the tires/bearings/brake assemblies interaction with the treadmill really means the plane is limited to how fast it can move backwards in the first place. So I shall repeat, a plane that is stationary will never achieve flight without air moving over its wings. Also the thrust from a turbine engine does not generate air flow over the wings unlike what you’re assuming.

The thrust from the turbine engine will move the plane down the runway length (as described in the gif) treadmill at whatever speed is needed to take off, the fact that the treadmill is going the other direction has (almost) zero affect (there will be some friction) on the trubines propelling the plane fast enough to take off.

Nobody said the plane wasn't going to move and the wheels are simply rotating and are not being driven. The plane will take off.

[Patrick Johnson]

Originally Posted by Hits 'em Hard

...to sit there and say that a plane with zero airspeed will take off is absurd.

I agree. Where have I said that?

...a plane that is stationary will never achieve flight without air moving over its wings.

I agree. Where have I said otherwise?

the thrust from a turbine engine does not generate air flow over the wings unlike what you’re assuming.

I agree. Where have I assumed that?

It seems we differ on what words mean.

pj
chgo

[jackpot]

There is a very simple answer to this if you will only look , you
will or should I say you might believe that it is as it should never
have gone there in the second place. I realize that many have tried
and even those that forget or choose not to forget will some day
be held accountable even though. So in the long run it may be the
"mail Man" who is after all is said and done.
jack

[Patrick Johnson]

Originally Posted by jackpot

There is a very simple answer to this if you will only look , you
will or should I say you might believe that it is as it should never
have gone there in the second place. I realize that many have tried
and even those that forget or choose not to forget will some day
be held accountable even though. So in the long run it may be the
"mail Man" who is after all is said and done.
jack

What he said.

pj
chgo

[djg576]

Originally Posted by jackpot

There is a very simple answer to this if you will only look , you
will or should I say you might believe that it is as it should never
have gone there in the second place. I realize that many have tried
and even those that forget or choose not to forget will some day
be held accountable even though. So in the long run it may be the
"mail Man" who is after all is said and done.
jack

Quick, somebody cut him off.

[RiverCity]

Originally Posted by djg576

Quick, somebody cut him off.

Here, lets get back to funny, while sticking with the mailman theme....

https://www.youtube.com/watch?v=4cZ_C3mN65g

[JohnnyOzone]

Originally Posted by Hits 'em Hard

You must have not understood the premise of the question to start with. The plane doesn’t move forward, at all, never. Think about it. The whole point of including the conveyor belt is the trick of the question. Chain the plane in place. The engines, whether turbine or propellor will not cause lift on the wings. Engine speed could be maxed out. If air speed is zero, then there is zero lift.

I understood it perfectly. You are the genius who thinks that the plane would not be moving forward because of the treadmill. Maybe the OP thought the same thing. You both could not be more wrong.

Your brain is tied to the misconception that the plane is propelled by it's wheels, like a car would be..

Think of this.....
You have a Corvette on a treadmill, and both the wheel speed and the treadmill speed are perfectly offsetting each other, so there is no relative movement. Then.....They pull off the tarp off the back of the car revealing a 15,000 lb. thrust jet engine. Somebody turns on the great big freakin' jet engine attached to the back of the corvette. So you think that the car would still not move forward relative to the treadmill?
.
Heck, even think of this....as the jet engine thrust increases, take the car out of gear. Now the car's wheels are mechanically disconnected from the new drivetrain (jet engine) Increase the thrust and the car will move forward - the wheels will spin faster and faster as the thrust is increased and the relative car speed increases.

[pt109]

——————-

[Scratch85]

Originally Posted by JohnnyOzone

I understood it perfectly. You are the genius who thinks that the plane would not be moving forward because of the treadmill. Maybe the OP thought the same thing. You both could not be more wrong.



Your brain is tied to the misconception that the plane is propelled by it's wheels, like a car would be..



Think of this.....

You have a Corvette on a treadmill, and both the wheel speed and the treadmill speed are perfectly offsetting each other, so there is no relative movement. Then.....They pull off the tarp off the back of the car revealing a 15,000 lb. thrust jet engine. Somebody turns on the great big freakin' jet engine attached to the back of the corvette. So you think that the car would still not move forward relative to the treadmill?

.

Heck, even think of this....as the jet engine thrust increases, take the car out of gear. Now the car's wheels are mechanically disconnected from the new drivetrain (jet engine) Increase the thrust and the car will move forward - the wheels will spin faster and faster as the thrust is increased and the relative car speed increases.

Does this matter? “The conveyor belt is designed to exactly match the speed of the wheels, moving in the opposite direction.”


Sent from my iPhone using AzBilliards Forums

[conetip]

It is amazing how you put an aircraft on a treadmill and for what ever reason, people think it can fly. Yet the same people no doubt can visualise themselves on a tread mill going no where and even can watch a tv. It should be obvious that with no air over the wings the aircraft can not fly , unless it has VTOL properties.
So funny.

[Mr Slate]

Originally Posted by JohnnyOzone

I understood it perfectly. You are the genius who thinks that the plane would not be moving forward because of the treadmill. Maybe the OP thought the same thing. You both could not be more wrong.

If the OP only "maybe" thought the same thing, how can you be certain that he couldn't be more wrong when no answer was ever stated either way? Maybe the OP's answer is that the plane would fly backwards and upside down at the same time. That would definitely be more wrong. Asking for a friend.

[RichSchultz]

please don’t let this aircraft riddle kill this thread

[Mr. Wilson]

What people are missing on the jet topic, is that the jet engine is what makes the difference.

Thrust is what will move the air over the wings.

It wouldn't matter at all if there were skis on the bottom of the jet....the jet engine pushes air, it doesn't turn wheels.

[bbb]

see post below

[bbb]

[QUOTE=RichSchultz;6335512]please don’t let this aircraft riddle kill this thread[/QUOTE]
^^^what he said