For those that don't get the 'plane on a conveyor' thingy. - Corsa Sport - for Vauxhall and Opel Corsa B, Corsa C and Corsa D

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Ste

Premium Member

Registered: 5th Mar 03
Location: Taif, Saudi Arabia
User status: Offline

31st Oct 09 at 02:08

Imagine a car is on a conveyor. It is in NEUTRAL. It has a winch attached to the tow eye on the front. the winch is attached to a solid object.

Now suppose the winch starts pulling the car forward, the conveyor matches the forwards velocity of the car but in the opposite direction.

The car will still get pulled by the winch, but the wheels will be spinning twice as fast as the ground below it moves, the force acting on the car is seperate from the force acting on the wheels.

This is the same principal. The planes engines effect the air, not the ground, so no matter what the ground is doing, the plane will move as the engines push against the air.

The original question DOES NOT say that the plane stays still, just that the conveyor matches it's forward speed.

Hope this answers it for you.

I would rather lose by a mile because i built my own car, than win by an inch because someone else built it for me.

John

Member

Registered: 30th Jun 03
User status: Offline

31st Oct 09 at 02:38

So you're saying it doesn't take off, I get it now.

Richardhhha

Member

Registered: 29th Sep 07
Location: Croydon, Greater London
User status: Offline

31st Oct 09 at 03:17

No the plain will still take off.. Google myth busters plain on a convare belt

Member

Registered: 10th Sep 03
User status: Offline

31st Oct 09 at 10:23

You needed Mythbusters to tell you that?

AndyKent

Member

Registered: 3rd Sep 05
User status: Offline

31st Oct 09 at 11:04

quote:
Originally posted by Richardhhha
No the plain will still take off.. Google myth busters plain on a convare belt

Seriously

Kyle T

Premium Member

Registered: 11th Sep 04
Location: Selby, North Yorkshire
User status: Offline

31st Oct 09 at 11:11

Man walks into a shop and asks for some Helicopter flavoured crisps...

"sorry mate, we only do plain."

Lotus Elise 111R

Impreza WRX STi

Ste

Premium Member

Registered: 5th Mar 03
Location: Taif, Saudi Arabia
User status: Offline

31st Oct 09 at 22:00

quote:
Originally posted by John
So you're saying it doesn't take off, I get it now.

It does take off, I'm explaining how the conveyor has no effect on the forwards motion of the aircraft.

The conveyor is there to confuse the idiots into thinking that it's velocity in the opposite direction of the aircraft will cancel out the aircraft's forward velocity, when it won't.

[Edited on 31-10-2009 by Ste W]

I would rather lose by a mile because i built my own car, than win by an inch because someone else built it for me.

Cosmo

Member

Registered: 29th Mar 01
Location: Im the real one!
User status: Offline

31st Oct 09 at 22:03

But did the car take off or not? And if it does what happens when the cable connected to the winch runs out?

_Allan_

Member

Registered: 24th Mar 04
User status: Offline

31st Oct 09 at 22:03

Is it a Saab?

Leighton

Member

Registered: 21st Feb 01
Location: Liverpool
User status: Offline

31st Oct 09 at 22:08

Why did you start this again !!

AlexN

Banned

Registered: 21st Oct 09
User status: Offline

31st Oct 09 at 22:11

If the planes take off speed is 60knots and the conveyor belt is moving at 60knots how will air pass over the wings

Cosmo

Member

Registered: 29th Mar 01
Location: Im the real one!
User status: Offline

31st Oct 09 at 22:12

quote:
Originally posted by AlexN
If the planes take off speed is 60knots and the conveyor belt is moving at 60knots how will air pass over the wings

Are you serious?

AlexN

Banned

Registered: 21st Oct 09
User status: Offline

31st Oct 09 at 22:16

I'm just trolling it up

Cosmo

Member

Registered: 29th Mar 01
Location: Im the real one!
User status: Offline

31st Oct 09 at 22:19

Really? Or you're just now trying to cover your stupidity?

AlexN

Banned

Registered: 21st Oct 09
User status: Offline

31st Oct 09 at 22:22

I am inteligent. I can put the boiling water in the pot noodle by myself

Jake

Member

Registered: 24th Jan 05
User status: Offline

31st Oct 09 at 22:24

i cant get my head around this one. am i right in saying jet engines suck in air and push it out the back to create thrust so the plane moves forwards and the quicker the plane goes the more air gets under the wings so it takes off? if thats the case how can the plane take off it its on a conveyor belt not moving?

Cosmo

Member

Registered: 29th Mar 01
Location: Im the real one!
User status: Offline

31st Oct 09 at 22:28

Yes that is the basic principle.

The wheels are free moving, so the plane could be thrust forward regardless of the speed of the conveyor belt on the wheels. Thats the bit you need to get your head round. Dont think of it like a car where the wheels are driven and you would therefore not be able to move it forward should the conveyor match the wheel speed.

_Allan_

Member

Registered: 24th Mar 04
User status: Offline

31st Oct 09 at 22:30

The question is 'Would the Walrus take off?'

AlexN

Banned

Registered: 21st Oct 09
User status: Offline

31st Oct 09 at 22:36

What if the walrus doesn't have a towing eye

Adam_B

Member

Registered: 13th Dec 00
Location: Lancashire
User status: Offline

31st Oct 09 at 22:45

what if the Walrus is in a church?

Richardhhha

Member

Registered: 29th Sep 07
Location: Croydon, Greater London
User status: Offline

1st Nov 09 at 01:54

quote:
Originally posted by AndyKent

quote:
Originally posted by Richardhhha
No the plain will still take off.. Google myth busters plain on a convare belt

Seriously

so what so i cant spell.
at least i made an effort compaired to a lot of people who just do text speak..

Ste

Premium Member

Registered: 5th Mar 03
Location: Taif, Saudi Arabia
User status: Offline

1st Nov 09 at 02:06

quote:
Originally posted by jake
the more air gets under the wings so it takes off? if thats the case how can the plane take off it its on a conveyor belt not moving?

The lift is generated by a difference in pressure above and below the wing, due to the shape of the wing.

I think the main thing that you need to get past is that the plane isn't standing still. The conveyor belt doesn't stop it moving. The engines push air, whether its taxiing on the ground or in full flight.

As long as you understand that the plane is able to move, you will understand that it is able to fly.

[Edited on 01-11-2009 by Ste W]

I would rather lose by a mile because i built my own car, than win by an inch because someone else built it for me.

J da Silva

Member

Registered: 10th Apr 03
Location: The FACTory
User status: Offline

1st Nov 09 at 17:04

So..... did the car take off then or what? We should try it with a 98 plate corsa IMO.

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Corsa Sport » Message Board » Off Day » For those that don't get the 'plane on a conveyor' thingy.

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