Airplane on a Conveyor Belt...

[SaburoS]

Eskimo and AKIron,

You have a super high powered jet plane with super low mass indestructible wheels and zero friction electromagnetic bearings. You also have the super conveyor of your dreams.

The wheels truly freewheel here with no energy loss.

Does the plane take off?

[SaburoS]

Originally posted by eskimo2
I don't think you've read the question carefully.  Please do not skim it.  This is not your example and it is not the question where the conveyor matches the wheel speed.  Please read carefully and try to understand what THIS question is asking:

"A plane is standing on a runway that can move like a giant conveyor belt. The plane applies full forward power and attempts to take off. This conveyor has a control system that tracks the plane's speed and tunes the speed of the conveyor to be exactly the same but in the opposite direction, similar to a treadmill."

I tell you what, I'll need a break and revisit this further. I need to get some work done!!! My answering at this time will not yield any new results.

[john9001]

the belt has no effect on the speed of the plane, as someone said the wheels freewheel, thats their job, and don't even get into melting bearings and exploding tires. The original question did not ask if the plane would fly before bill's tundra tires exploded.

the belt cannot push on the plane, it can only spin the tires. Thrust moves the plane.

[eskimo2]

Any plane that has enough power to take off on a normal runway with its wheels locked, also could take off on the super-conveyor.  In both cases the tires would be skidding/slipping though.  F-15 perhaps?

[AKIron]

Originally posted by john9001
the belt has no effect on the speed of the plane, as someone said the wheels freewheel, thats their job, and don't even get into melting bearings and exploding tires. The original question did not ask if the plane would fly before bill's tundra tires exploded.

the belt cannot push on the plane, it can only spin the tires. Thrust moves the plane.

Have you watched eskimo's sander video? Seeing is believing in this case. the belt can and does apply force to the wheels. Only massless wheels would be "free wheeling".

[eskimo2]

Originally posted by SaburoS
I tell you what, I'll need a break and revisit this further. I need to get some work done!!! My answering at this time will not yield any new results.

Awe, come on.  Just answer the one question with the wheel-speed-match removed from the problem.  It really is a much simpler question.  Even I concede that it will take off.

[SFRT - Frenchy]

I'm sure it was pointed out already, but how some of you keep persisting on debating that with as much common sense as an Hillari/Obama suckfest is beyond my little brain.

lift force = ¨1/2 p "True airspeed"2 x coefficient of lift x wing area

wing area, angle of attack, relative speed of the air to my aircraft.

That's it, doesn't say about the frecking color of my underwares and what I had yesterday for lunch.

I tell you what, screew this ingeneer mumbojambo :
Lift my plane in the air via a crane 50ft above the ground, spin my wheels at mach3, release the line, and I'll pancake myself straight down.

Any of you wanabee geniuses, is more than welcome to stand right below the plane to let you prouve your point to Darwin.    

[john9001]

what do belt sanders have to do with magical conveyor belts?

[AKIron]

Originally posted by john9001
what do belt sanders have to do with magical conveyor belts?

they work exactly the same way

[eskimo2]

Originally posted by SFRT - Frenchy
I'm sure it was pointed out already, but how some of you keep persisting on debating that with as much common sense as an Hillari/Obama suckfest is beyond my little brain.

lift force = ¨1/2 p "True airspeed"2 x coefficient of lift x wing area

wing area, angle of attack, relative speed of the air to my aircraft.

That's it, doesn't say about the frecking color of my underwares and what I had yesterday for lunch.

I tell you what, screew this ingeneer mumbojambo :
Lift my plane in the air via a crane 50ft above the ground, spin my wheels at mach3, release the line, and I'll pancake myself straight down.

Any of you wanabee geniuses, is more than welcome to stand right below the plane to let you prouve your point to Darwin.    

What in the world are you talking about?  I don’t see how your example relates to anything any of us are saying.

[AKIron]

Ya know I never asked but is this whole thing in a vacuum? 'Cause if it is that plane definitely ain't flyin'.

[SFRT - Frenchy]

I'm answering to the title of the thread

How fast my wheels spin don't matter of me getting airborne.

Heck I can even get airborne with my wheels not spining at all, has been dome before on a Metroliner, killed everyone due to brake fire.

[AKIron]

Originally posted by SFRT - Frenchy
I'm answering to the title of the thread

How fast my wheels spin don't matter of me getting airborne.

Heck I can even get airborne with my wheels not spining at all, has been dome before on a Metroliner, killed everyone due to brake fire.

If the wheels weren't spinning how did the brakes get hot?

[john9001]

the tire caught fire and set the brake fluid on fire.

[AKIron]

Originally posted by john9001
the tire caught fire and set the brake fluid on fire.