That plane/conveyor problem - filmed solution

[slikk]

Does this help?
kim

[slikk]

Or this?

[munky]

orgasmicliving!! said:

trackdemon said:

munky said:

orgasmicliving!! said:

Brink said:

Tris.E said:

GingerNinja said:

For those who still can't see that the plane will take off, someone's made a film to prove the point that it would......

http://videos.streetfire.net/player.a

Apologies if this was shown before.

THE PLANE WILL STAY ON THE GROUNG WHY CANT YOU SEE THAT IT WILL??????????????

Ok, Ginge, how do hellicopters take off then? Does the pilot have to spin a wheel next to his seat? What about the Shuttle? Does that have a secret wheel somewhere that winds up to a galaxic speed to make ordit?

As I said eariler, Boo!lux.

space shuttle takes off like a rocket. it can move forward in space. it doesn't "fly" by using airflow past its stubby little wings. rockets are completely different.

Helicopters do need to spin their "wings" which are the rotor blades. They can't take off without spinning their rotors. Honest.

ok.. so.. will a helicopter take off if it's on a hydraulic lift that decends at the same speed at which a helicopter can climb?

Of course

Yes, of course.

exactly. a plane will take off on a conveyor belt for the same reason.

[s2art]

slikk said:

Or this?

Depends on the take off speed and strength of tyres etc.

[mini_ralf]

slikk said:

Does this help?
kim

Good enough for me but you'd better be careful or they'll all try to argue....

[orgasmicliving!!]

munky said:

exactly. a plane will take off on a conveyor belt for the same reason.

completely different. if you wanted to make it a similar situation, you'd make the helicopter sit in the middle of a spinning wind vortex, revolving and accelerating at the same rate as the helicopter blades and in the same direction. without affecting the rest of the helicopter.

now...would the helicopter take off?

Edited by orgasmicliving!! on Thursday 14th December 16:13

[KB_S1]

Would Tris.E please answer the question regarding the skateboard.

[Mr Whippy]

s2art said:

slikk said:

Or this?

Depends on the take off speed and strength of tyres etc.

Yep, the key there is the force balance. Engine thrust on airframe vs drag at wheels/conveyor interface.

Dave

[mini_ralf]

slikk said:

Or this?

Unless I'm monumentally mistaken I'm pretty sure that the plane could take off in this scenario.

[s2art]

mini_ralf said:

slikk said:

Or this?

Unless I'm monumentally mistaken I'm pretty sure that the plane could take off in this scenario.

It would if the tyres are up to it (double normal take off speed), highly likely that they would explode first.

[slikk]

Spot on (Ralf).

In the other scenario, however, it never will.

kim

Edited by slikk on Thursday 14th December 16:19

[orgasmicliving!!]

yup, agreed it takes off here. and in the other scenario, it doesn't.

[slikk]

Pictures do indeed paint a thousand words.. .. ..

[s2art]

slikk said:

Spot on (Ralf).

In the other scenario, however, it never will.

kim

Edited by slikk on Thursday 14th December 16:19

So what are Cessna tyres rated to? Any evidence that they would survive twice normal speed?

[slikk]

s2art said:

slikk said:

Spot on (Ralf).

In the other scenario, however, it never will.

kim

Edited by slikk on Thursday 14th December 16:19

So what are Cessna tyres rated to? Any evidence that they would survive twice normal speed?

As the scenario is all assumption, I suggest that we assume the tyres can handle it.

kim

[Tris.E]

KB_S1 said:

Would Tris.E please answer the question regarding the skateboard.

From what you said the skate board will stay still unless im missing something.
But how does that prove that a plane would take off as a plane uses air flow to fly and as it is staying still it can't fly and as the engines wouldnt be able to go at full thrust due to the lack of air flow they would not create enough trust to force it into the air.
And thats the last im saying on this subject as its just getting stupid now with people just slaying each other why dont we just start a roasting page so they can get it all out of there system??????????????????????????

[orgasmicliving!!]

s2art said:

slikk said:

Spot on (Ralf).

In the other scenario, however, it never will.

kim

Edited by slikk on Thursday 14th December 16:19

So what are Cessna tyres rated to? Any evidence that they would survive twice normal speed?

why would you even care??? it's not what the question asks you to consider. there are a million things to consider in the real world, but not in theoretical questions. surely you agree that this is going off on an irrelevant tangent?

Edit: I see slikk already addressed this.

Edited by orgasmicliving!! on Thursday 14th December 16:33

[s2art]

orgasmicliving!! said:

s2art said:

slikk said:

Spot on (Ralf).

In the other scenario, however, it never will.

kim

Edited by slikk on Thursday 14th December 16:19

So what are Cessna tyres rated to? Any evidence that they would survive twice normal speed?

why would you even care??? it's not what the question asks you to consider. there are a million things to consider in the real world, but not in theoretical questions. surely you agree that this is going off on an irrelevant tangent?

Edit: I see slikk already addressed this.

Edited by orgasmicliving!! on Thursday 14th December 16:33

The question as poses was careful about specifying a zero mass belt etc. The fact that they did that indicates that the rest of the plane is made up of real, normal components. Otherwise why not specify?
If so the tyres are suspect for a double speed take off.

[esselte]

Tris.E said:

is staying still it can't fly and as the engines wouldnt be able to go at full thrust due to the lack of air flow they would not create enough trust to force it into the air.

Wouldn't the jet produce it's own airflow via the huge compressor in the front of it? When they are testing the things they usually do it on the ground,not whilst the plane is flying

[orgasmicliving!!]

s2art said:

orgasmicliving!! said:

s2art said:

slikk said:

Spot on (Ralf).

In the other scenario, however, it never will.

kim

Edited by slikk on Thursday 14th December 16:19

So what are Cessna tyres rated to? Any evidence that they would survive twice normal speed?

why would you even care??? it's not what the question asks you to consider. there are a million things to consider in the real world, but not in theoretical questions. surely you agree that this is going off on an irrelevant tangent?

Edit: I see slikk already addressed this.

Edited by orgasmicliving!! on Thursday 14th December 16:33

The question as poses was careful about specifying a zero mass belt etc. The fact that they did that indicates that the rest of the plane is made up of real, normal components. Otherwise why not specify?
If so the tyres are suspect for a double speed take off.

based on that analysis, again, the answer would be that it wouldn't take off...