If a ton of feathers landed on your head...

[Andy 0]

The plane was actually a harrier jump-jet.

 

I am win.

 

133489[/snapback]

 

Already been said.

 

You am lose or whatever.

133500[/snapback]

 

Wrong.

 

I'm a joint winner.

[Happy Face 29]

The plane was actually a harrier jump-jet.

 

I'm a joint winner too.

[Gemmill 46176]

Put me down for 1st= too.

[Guest alex]

[Renton 22031]

This thread has seriously turned to shit. Anyone else got a decent puzzle?

[Happy Face 29]

This thread has seriously turned to shit. Anyone else got a decent puzzle?

133539[/snapback]

 

If a tree falls down in a forest and no-one is there to hear it, does anyone give a shit?

[Guest alex]

On the island of Knights and Knaves, every inhabitant is either a knight or a knave. Knights always tell the truth. Knaves never tell the truth; any sentence uttered by a knave is false. A stranger came to the island and encountered three inhabitants, A, B, and C. He asked A, "Are you a knight, or a knave?" A mumbled an answer that the stranger could not understand. The stranger then asked B, "What did he say?" B replied, "A said that there is exactly one knight among us." Then C burst out, "Don't believe B, he is lying!" What are B and C?

[adios 717]

B is a knave, C is a knight.

[Guest alex]

B is a knave, C is a knight.

133555[/snapback]

Correctomundo.

[Kid Dynamite 7191]

How much wood would a wood chuck chuck if a woodchuck could chuck wood?

 

If it takes 2 men an hour to dig a hole, how long does it take 1 man to dig half a hole?

[Toonpack 10036]

This is a basic way of describing it:

 

step one: plane's engines throttle up, increasing the force against the AIR behind the engines. no force is applied to the wheels

 

step two: increased force against the air pushes plane forwards

 

step three: conveyor belt starts turning the opposite way to the directon of the plane, meaning the wheels spin twice as fast as the plane is moving through the air

 

step four: the plane continues to accelerate, as does the conveyor belt, until the plane's AIRSPEED reaches, say, 160kts. At this point the wheels are spinning at the equivalent of 320kts

 

step five: plane takes off, because an airspeed of 160kts is more than enough to produce required lift on the wings

 

step six: wheel bearings probably melt, plane has trouble landing

133306[/snapback]

 

I can see what you are saying.

 

The engines suck the air over the wings. However this would create "hotspots" and not a uniform lift as the majority of the wing would not have any lift. Also its very dependent on the location of the engines. The ideal location being exactly in the middle of the wing, which is never the case as they are almost always located beneath them. This means the only air flow is under the wing and none above. Now in order to determine the pressure underneath depends on the speed of the air. Now you have to look into the compressable flow equations. Now assuming mach 0.999 airspeed through the engine this give a pressure of about 0.55atm below the wing compared to 1atm above. And hence no lift and the plane is infact forced to the ground

133333[/snapback]

 

Actually, it's a trick question, there is no possible "yes" or "no" answer, because the question is illogical. I just thought I'd play devil's advocate

 

Basically, for the plane to move forward the wheels must be moving faster than the conveyor, yeah? But for the plane to move from it's station-holding position on the conveyor, as the thrust is applied to the engine, the wheels must turn quicker for it to develop forward motion. And according to the initial question, the conveyor will instantly match the speed of the wheels.

 

And that's the sticking point. As soon as the conveyor belt increases speed to match the plane's wheel speed, the plane's wheel speed will increase. It is impossible for the conveyor belt to ever be the same speed as the wheels of the plane once more-than-station-keeping thrust has been applied, and the wheels would instantaneously reach inifinite rotational velocity.

 

Thus, it's a bogus question. The circumstances described simply can't happen.

 

A better way to phrase the question, however, would be to replace "wheel speed" with "plane speed", as that is actually realistic... But that's for another day.

133438[/snapback]

 

 

You're not entirely right, as has already been mentioned lift could theoretically be generated with no forward movement of the plane. Having thought about this situation some more with the engines going full pult and the flaps on the wings forcing air down, (and hence plane up) a large amount of lift would be generated.

 

The stuff you are spouting about the conveyer and wheels is totally irrelevent since the question stated the conveyer would always match the wheel speed. SO if the wheels go infitiely fast the belt is too. Hence station keeping velocity is always equal to wheel velocity. I viewed is being that the wheel was trapped between two rolling metal tubes and spinning them so as engine speed increased the roller speed increased. Assuming no mechanical failures the the net plane horizontal motion would be zero. No matter how much thrust.

 

The real argument is can the engines also suck enough air around the wings to get the lift required. Then the plane would vertically take off until it was above the belt then bomb forward and take off like normal.

 

The other dodgy premises are the plane. Its like saying "i want a new combi boiler how much do they cost?" they are all different.

133466[/snapback]

 

One slight flaw in that hypothesis, engines provide forward thurst to the plane as a total entity, the airflow over the wings generated by said forward motion creates lift.

 

Plane engines do not suck air over the wings

 

Sorry

[Walliver 0]

Unless you specify the size of the hole, you cannot dig half a hole.

 

As for the snakes, I don't think that was resolved. One cannot eat the other's head because as it [sid the Snake] moves round to eat the other's [sammy the Snake] head, Sammy's head will move further round Sid. Surely they will both get to about halfway up each other, be a pretty circle, and then be stuck - as when one tries to eat any more the other is trying to eat more and neither can get any further round.

[Happy Face 29]

With regards to the plane, I've changed my mind, it will take off.

 

Definately.

 

End of.

[Dr Kenneth Noisewater 0]

The plane won't take off, the feathers won't kill you and the snakes can only get half-way up each other. FACT CUBED.

[Happy Face 29]

The plane won't take off, the feathers won't kill you and the snakes can only get half-way up each other. FACT CUBED.

133682[/snapback]

 

The plane will take off.

 

If you were on rollerskates on a treadmill that matched the wheel speed, and someone gave you a push, you'd move! The wheel's would just spin faster.

 

The engines will move the plane, it won't just levitate, but will accelerate to take off speed.

[Lazarus 0]

 

 

Someones gonna back up their argument by quoting Newton.

 

I just know it.

[Dr Kenneth Noisewater 0]

1. How do they get the bubbles evenly distributed through an Aero, shirley they should float to the surface before the chocolate sets?

 

2. If you took a Zebra foal (is that the right word?) and trained it, could you eventually get a saddle on it and ride it like a horse?

[Renton 22031]

1. How do they get the bubbles evenly distributed through an Aero, shirley they should float to the surface before the chocolate sets?

 

2. If you took a Zebra foal (is that the right word?) and trained it, could you eventually get a saddle on it and ride it like a horse?

134907[/snapback]

 

Re: 2

 

Yes. There's a film called racing stripes about it. Also if you breed a zebra and a horse you get a Zorse.

[The Fish 10977]

surely the inner part is rapidly chilled and set so that the bubbles cannot get through the viscous moolten chocolate, then a second layer of chocolate is added to smooth over this bubbled layer?

 

and yes, yes you can

[Dr Kenneth Noisewater 0]

There's a film called racing stripes about it.

134913[/snapback]

Hmm, is that not a work of fiction rather than a documentary?

[Guest alex]

1. How do they get the bubbles evenly distributed through an Aero, shirley they should float to the surface before the chocolate sets?

 

2. If you took a Zebra foal (is that the right word?) and trained it, could you eventually get a saddle on it and ride it like a horse?

134907[/snapback]

 

Re: 2

 

Yes. There's a film called racing stripes about it. Also if you breed a zebra and a horse you get a Zorse.

134913[/snapback]

Re: 1 Is it not similar to the way 'bubbles' are evenly distributed through bread? Or am I talking shite?

[The Fish 10977]

if you breed a male tiger with a female lion, do you get a Liger or a Tion?

[Renton 22031]

There's a film called racing stripes about it.

134913[/snapback]

Hmm, is that not a work of fiction rather than a documentary?

134916[/snapback]

 

Yes it was. And it wasn't particularly convincing.

[Meenzer 15742]

You get a liger, shirley?

[Guest alex]

Ligers are canny cool, massive too.