Off topic - a little puzzle

Is it a Harrier this plane I bet if it was a Dini it would take off tho.....................................

[Alpineandy]

I think Mich means the speed of the plane relevant to the ground (planet), ie if the plane is flying at 100mph, and a conveyer is going 100mph or the wheels are going 50mph makes do difference, its still 'flying' at 100mph..

Yes, I understood that.
The point is that a plane will not take of with thrust alone unless the thrust is verticule (a harrier). The speed that the conveyor moves at is not relevant.
The question that needs answering is 'does it generate enough air across it's wings to generate lift'.
The 'yes' or 'no' answer to the original question depends completely and utterly upon this answer and everything else is smoke and mirrors.

I think Mich means the speed of the plane relevant to the ground (planet), ie if the plane is flying at 100mph, and a conveyer is going 100mph or the wheels are going 50mph makes do difference, its still 'flying' at 100mph..

Yes, I understood that.
The point is that a plane will not take of with thrust alone unless the thrust is verticule (a harrier). The speed that the conveyor moves at is not relevant.
The question that needs answering is 'does it generate enough air across it's wings to generate lift'.
The 'yes' or 'no' answer to the original question depends completely and utterly upon this answer and everything else is smoke and mirrors.

lol, youve fallen into the trap.

Ok, imagine there is not the jet engine pushing the plane forward, just a great big hydraulic piston pushing it forward (in theory at enough speed to be able to make the plane go fast enough and create lift, take off..)

Will putting the conveyer belt on in the opposite direction not make the hydraulic piston move the plane forward then?. The piston doesnt even know the conveyor belt exists, so why would turning it on have any effect on the forward motion of the piston/plane?

Is it a Harrier this plane I bet if it was a Dini it would take off tho.....................................

Heres another one...

A Dini is sitting on a drag strip. The earth is turning at thousands of miles per hour. If it accellerates hard enough, will it have enough power to spin the earth in reverse?

AA I think you are the man to answer my question about aerodynamis on Lee's CC/IC thread.

As for this thread, it seems to have been rail roaded by self employed astonaughts. It's chaps like you that beleive man can fly to the moon, you should be on university challenge.

Oh well, Im off to open up a fresh bottle of red medicine, I have some sort of stomach cramp caused by excessive laughter taking root which is crippleing me and making my eyes water so much I can't read many more posts tonight.

Is it a Harrier this plane I bet if it was a Dini it would take off tho.....................................

Heres another one...

A Dini is sitting on a drag strip. The earth is turning at thousands of miles per hour. If it accellerates hard enough, will it have enough power to spin the earth in reverse?

Road tyres or slicks ????
If it goes fast enough it might disappear up its own asp ........................

Is it a Harrier this plane I bet if it was a Dini it would take off tho.....................................

Heres another one...

A Dini is sitting on a drag strip. The earth is turning at thousands of miles per hour. If it accellerates hard enough, will it have enough power to spin the earth in reverse?

YES, that is Newton's law of action and reaction. However due to the small size of a Dini it will definately be unmeasureable.

Bloody Isacc Newton

"Sir Isaac Newton" actually.

http://www-history.mcs.st-andrews.ac.uk ... ewton.html

[Alpineandy]

lol, youve fallen into the trap.
Ok, imagine there is not the jet engine pushing the plane forward, just a great big hydraulic piston pushing it forward (in theory at enough speed to be able to make the plane go fast enough and create lift, take off..)
Will putting the conveyer belt on in the opposite direction not make the hydraulic piston move the plane forward then?. The piston doesnt even know the conveyor belt exists, so why would turning it on have any effect on the forward motion of the piston/plane?

Yes I understand that....
Back to my original point.
Can it generate enough lift?
That is the only relevant answer.

(I'm not giving an answer to the question, just trying to cut the irrelevant questions/answers out of everyones questions/answers )

Can it generate enough lift?
That is the only relevant answer.

Actually that's an irrelevant question, if you understand the answer.

The speed of the wheels and converyor belt is largely irrelevant.

So the speed of the plane relative to the ground does not have to depend on the speed of the conveyor/wheels.

A planes ability to take of is it's speed relative to the air, not the ground.
Air speed not ground speed. Could it get enough air across it's wings to generate lift?

In the absence of any other information I had made the following assumptions:

1 - This was a normally designed aeroplane whose wings would generate lift as they, and the rest of the aircraft, moved in a forward direction thereby creating a flow of air over the wings (see assumption2).

2 - There was no head or tail wind and therefore the speed of the aircraft relative to the ground would be approximately the same as its speed relative to the air.

3 - The aircraft had not been overloaded to the point that its mass was in excess of the maximum lift that the wings could generate at the maximum design speed (see assumption 4)

4 - the conveyor belt/runway was long enough for the aircraft to develop necessary take-off speed

5 - the aircraft had been given take off clearance by air traffic control

6 - the necessary safety demostration had been given and the doors had been set to automatic and cross-checked

7 - the cabin crew had taken their seats for take-off

8 - all electrical items including mobile telephones, laptop computers, radios and personal cd players had been switched off as they could interfere with with aircraft systems

9 - the brakes had been released and chocks removed

..you forgot to shut the doors, and load everybody's suitcases...theyre gonna be pissed....

..you forgot to shut the doors, and load everybody's suitcases...theyre gonna be pissed....

Well pissed already, if they're going Magalooffy

..you forgot to shut the doors, and load everybody's suitcases...theyre gonna be pissed....

Assumption 6 covers the doors being closed as they can't be set to automatic unless closed but you are right regarding the luggage - however, being a Scotsman, I normally get my luggage at duty free so it would be in the overhead locker - sod everyone else