So you have a plane and a conveyor belt....Does it take off?

[Anakha56]

Bored much?

No it will not take off. Its plastic...

[GreyWolf]

It would need to be a pretty big turntable.

And strong.

[rustypup]

A helicopter typically has a peak RPM of about 2000RPM.

given that this is yet another of 'those' pretend-it-is-entirely-possible scenarios...

1) the turntable is capable of achieving a rotational speed just short that of light... and miraculously doesn't combust or succumb to the resulting centrifugal force, (ditto the hapless chopper).
2) the turntable's main drive components are linked through some fancy gadgetry to that of the chopper, ensuring perfectly timed responses to changes in rotor speed, within fractional milliseconds of them happening - designed to counter said rotation with little to no discernible delay.
3) the pilot is buck rodgers... a bullet chewing manly-man of a cyborg who shoots orphans for breakfast, thinks glass encrusted sandpaper makes the ideal loo-roll and comes fully equipped with all optional extras, ensuring near-perfect reflexes...

the chopper is probably on wheels... for all the difference that makes...

Bored much?

nope, but when i saw it, it did illicit a muffled snort or two in memory of this thread...

[doo_much]

3) the pilot is buck rodgers...

You do realise that, in all probability, very few people on this forum remember the TV show and even fewer the PC game?

[UrBaN]

rustypup, You had us at a disadvantage, you never said the chopper was on wheels. That changes everything.

[Monty]

rustypup, You had us at a disadvantage, you never said the chopper was on wheels. That changes everything.

The wheels only make a difference if they can rotate. In which case the chopper would take off as the tail rotor (and the free moving wheels) would keep it from spinning around

[UrBaN]

Monty, Umm...



So anyway.

[doo_much]

Monty, Umm...



So anyway.

Get used to it son. Humour in the format you serve it is not appreciated by all!

[UrBaN]

doo_much, You mean not everyone loves sarcasm? What tripe. Everyone loves it.

Back to the topic on hand...assuming the above 4 points as laid out by rusty, one could have the motor running at the correct velocity for liftoff, whilst applying the wheels brakes until the turntable was at a high velocity. If you then released the brakes, the centrifugal force would shoot the helicopter off the side, at which point it would take off.

et Voila!

[doo_much]

I disagree.

If you don't apply the brakes, the tail rotor will prevent the helicopter from spinning with the turntable, meaning the chopper will take off normally.

And no - not everyone loves tripe.

[Prime]

There is no such thing as centrifugal force. Its centripetal acceleration.

kthxbaai.

[UrBaN]

Wikipedia - Centrifugal Force

[SBSP]

The plane will be running a treadmill, standing still

[Monty]

The plane will be running a treadmill, standing still

No.
An aeroplane does not use its wheels to generate its forward momentum. It uses a propeller/jet engine to generate its forward momentum.

All the wheels are going to do is spin faster while the aeroplane moves forward and takes off

[rustypup]

it's like a really bad case of VD... it never quite clears up...

we are done with the plane... we now have a helicopter on a rotating platter...

[SBSP]

the helicopter will take of but the pilot will have to be Stringfellow Hawke

[UrBaN]

Monty, That's wrong. With the engine off, the aeroplane would move backwards. By putting the engines on, it holds the aeroplane in place.

Think of pulling off on a hill - you have to accelerate in order to hold the car still, else it rolls backwards and you kill Geri behind you. Same concept.

[SBSP]

Monty, That's wrong. With the engine off, the aeroplane would move backwards. By putting the engines on, it holds the aeroplane in place.

Think of pulling off on a hill - you have to accelerate in order to hold the car still, else it rolls backwards and you kill Geri behind you. Same concept.

Yea thats why i'm saying it will stand still the weight of the plane will push it down onto the belt.
Since there is perfect traction and the belt accelerates as much as the wheels ,the thrust is canceled out

Edit And Since the belt's speed is dynamic moving just as fast as the wheels in reverse the belts speed would be = to the engine trust

[SBSP]

the helicopter will take of but the pilot will have to be Stringfellow Hawke

and you have to play this song in the background.
http://www.televisiontunes.com/Airwolf_ ... _Data.html

[rustypup]

Monty, That's wrong.

where does arguing for the "no, it won't" camp get you?


bring the salt... you'll need it...

back to the chopper: stringfellow was a girls-blouse who loved nothing more than to spend time alone, fondling his cello... highly suspicious in itself, and not likely to overcome the laws of physics in order to see lift-off any time soon...

[UrBaN]

rustypup, Unless I have a HUGE flaw in my understanding of physics, I doubt there will be any eating of crow, or pie for that matter.

Back to the chopper - didn't we handle this already?

[hamin_aus]

Back to the chopper

Back to the chopper

[SBSP]

if you are driving on a black road in a black car and the car has no lights and you dont have a flash light and there is a dude dressed in black even his skin is painted black (And hes not laughing so his teeth is not showing) standing in the middle of the road how will you know when to stop so you dont run him over ?

[UrBaN]

it is daylight so you can see him clearly?

[SBSP]

it is daylight so you can see him clearly?

No its dark forgot to mention it. (Very dark like 12:00 at night dark and theres no moon and its cloudy , very cloudy and NO theres no thunder)