Is it just me or are people fucking thick?

Space Cowboy · Post by **Space Cowboy** » Wed Dec 13, 2006 2:18 pm 0

tufty wrote:
Space Cowboy wrote:
Mark wrote:blah ... blah ... helicopter ... blah ... blah ... airplane ... blah ... blah ... nonsense about wheels
I hate to think I am going to be keeping you up tonight, but do you know what the difference between a plane and a helicopter is? Seriously, can you locate the wings on an airplane and the wings on a helicopter. If you can then presumably you'll be able to appreciate the difference between how the wings provide lift on each type of aircraft.

Geez.
I don't think you got slapped enough for this one, so here's another slapping for you. It's meant in a fairly nice way, though.

Pffft, to your slapping, because you are ... in fact ... barking up the wrong tree. I mean, go back to the original author, he is now mentioning a harrier jump jet, fer crissakes. Wheels, don't you get it? The original questioned mentioned wheels and it was pertinent to the framing of the scenario, that the plane wouldn't be able to move. A helicopter doesn't need wheels to generate lift, neither does a jump jet, so what they're specious arguments when trying to prove a jumbo jet, while stationary ... see magic treadmill ... can still take off. It. Just. Can't.

tufty · Post by **tufty** » Wed Dec 13, 2006 2:24 pm 0

Space Cowboy wrote:A helicopter doesn't need wheels to generate lift, neither does a jump jet, so what they're specious arguments when trying to prove a jumbo jet, while stationary ... see magic treadmill ... can still take off. It. Just. Can't.

I give up.

Here's a magic pixie. He's a bit chubby, though, and seems to have left his magic bow at home, so you'll have to rely on your plane taking off because its wheels are spinning.

herbs64 · Post by **herbs64** » Wed Dec 13, 2006 2:25 pm 0

The conveyer belt is designed to exactly match the speed of the wheels, moving in the opposite direction.

This design would only work if:

A) The plane isn't trying to go anywhere (engines off, plane stationary), or
B) The plane is trying to take off with the wheel brakes on.

Bad design, I say.

Mir Nyet · Post by **Mir Nyet** » Wed Dec 13, 2006 2:30 pm 0

kalmar wrote:
Mir Nyet wrote:
kalmar wrote:
Roobarb wrote:
The original question wrote:Imagine a plane is sitting on a massive conveyor belt, as wide and as long as a runway, and intends to take off. The conveyer belt is designed to exactly match the speed of the wheels at any given time, moving in the opposite direction of rotation.
b) The treadmill moves backwards with velocity -n, when, if stationary the plane would otherwise have moved forwards with velocity n.
Careful of the wording. The treadmill moves with velocity -n, where n is the forward speed of the plane.

I agree though, it's definitely not A, that was inventively dreamed up by someone who initially jumped to the wrong answer and then tried to science their way out of it

Oi... I feel a slapping coming on
Actually, you don't get the credit, it was phattslagg's concept

Fair enough, I will just watch then while he slaps you about

l1n3n01z · Post by **l1n3n01z** » Wed Dec 13, 2006 2:52 pm 0

21 pages eh...

So I guess the answer to the question is
It's not just you

~D4T45H4T~ · Post by **~D4T45H4T~** » Wed Dec 13, 2006 4:02 pm 0

Riiighht.

OK, I think I've defected to 'the plane will move camp' now.

But with this magical treadmill rule in place, as soon as the plane thrusts forward, the wheels and treadmill will be rotating at an infinite speed, no?

At which point, either:

A) The plane's wheel bearings are atomised causing explodey-death
B) The magical treadmill is atomised causing explodey-death
C) The plane does move forward, but doesnt take off because the bloody handrail at the front of the treadmill is in the way.

kalmar · Post by **kalmar** » Wed Dec 13, 2006 4:18 pm 0

~D4T45H4T~ wrote:Riiighht.

OK, I think I've defected to 'the plane will move camp' now.

But with this magical treadmill rule in place, as soon as the plane thrusts forward, the wheels and treadmill will be rotating at an infinite speed, no?

Join us!

Yeah, maybe. But taken literally, the conveyor "matches the speed of the wheels".
Well, the speed relative to what? It doesn't say, but we can assume a fixed point off the conveyor, as it would be normally.
So then you've got a speed and direction and the conveyor has to "match" it. Has to move in the opposite direction to the plane (that's a rule), i.e. so that it would cancel out the motion of a car trying to drive forwards.

Therefore it does what Tufty said and moves backwards at the same speed that the plane is moving forwards. So the wheels are "only" going twice as fast as normal.

tufty · Post by **tufty** » Wed Dec 13, 2006 4:20 pm 0

kalmar wrote:... moves backwards at the same speed that the plane is moving forwards. So the wheels are "only" going twice as fast as normal.

Goddamn handrail's still a problem, though.

Baggypants · Post by **Baggypants** » Wed Dec 13, 2006 5:58 pm 0

What we need is NASA

xav · Post by **xav** » Wed Dec 13, 2006 6:07 pm 0

Baggypants wrote:What we need is NASA

Does the NASA information only apply to EasyJet planes?

Guru-Meditation · Post by **Guru-Meditation** » Wed Dec 13, 2006 6:20 pm 0

piku wrote:Please raise a hand if you believe the earth is flat and that the sun goes around it, dragged by a god.

Only an idiot would think that god would pull the sun round the earth.

He pushes it.

What I want to know is where the pixies keep all their arrows. Did you see the size of those things? And have you seen the size of a pixie?

Portland · Post by **Portland** » Wed Dec 13, 2006 6:29 pm 0

How the fuck is this thread still running?

Stuart B · Post by **Stuart B** » Wed Dec 13, 2006 6:30 pm 0

Guru-Meditation wrote:
piku wrote:Please raise a hand if you believe the earth is flat and that the sun goes around it, dragged by a god.
Only an idiot would think that god would pull the sun round the earth.

He pushes it.

Blasphemy!

He gives it a flick of course. Though he gets tired in the summer so it's not quite as fast or far away, natch.

kalmar · Post by **kalmar** » Wed Dec 13, 2006 6:34 pm 0

Portland wrote:How the fuck is this thread still running?

Pixie power.

Bog · Post by **Bog** » Wed Dec 13, 2006 6:35 pm 0

Christ. Get it right, children....