you are right Gastro! Apparently they put tiny turbines to increase air-water mix thus reducing water consumption. The very same turbine is used to generate enough power for leds (US patent link). It must be very tiny.

I don't know why I thought of this question recently but here goes,

When flying the window shutters need to be open during take off and landing. Why?

I asked a member of the cabin crew when I was last flying but they had no idea. Any insights appreciated

I believe it is case there is an accident so that the rescue crew can see where people are or if there are any survivors.

I remember in one of the "Air Crash" episodes they mentioned that pilots can't see the engines, so if something is wrong with the engine (fire, smoke, fuel leak) the passengers or crew members can give alert. Most accidents happen during take-off or landing..that's why i gues.

That is my belief/understanding(/hope!) too.

something like that ....

It may sound stupid, but why goal frame in football is often hit by the ball!?
It's a rather thin bar so statistically it should be hit very seldom.
Can it be because forward player look at the frame too much during shots or ...

Ask yourself this. Is the woodwork really hit that often?

I would say not. Ronaldo hit the woodwork for Portugal. Anyone else during the matches held so far? As a total pecentages of shots on goal how many hit the wordwork, were saved by the goalie or flew into the stands.

I think you'll find that it doesn't hit the woodwork that often...

It is hit very seldom BUT. The fact is that the most difficult shots to cover are always near the frame (angles). Most players will try to aim in those areas and hence hit it. Nobody locks dead on to the goalie

Fixed that for you...

In Germany Serbia game which is finished right now it happened 3 or 4 times!

It isn't. It's just that you notice it.

Cuz if it doesn't hit it, there's nothing to remember. Selective stats, sorry.

Yeah and it didnt hit the post 30+ times.

Would that be ∞ times or are you only including "shots" (both on and off target)?

Goal Keeper is covering around 75% of the goal due to the angle. Leaving corners as possible targets as well as the upper part of the frame.

But as hashbrown says, a Ball hitting the Frame is much easier to remember due to the "almost-goal" feeling that it provides.

A question if I may...

Why do most economists wear bow ties?

Answers offered via the medium of graphs are trumps.

Cuz they're twats.

"Module" is the pitch diameter divided by number of teeth - so you're right, there's something wrong with this picture! (Two gears which are meant to mesh should have the same module, i.e. same size teeth.)

I assume the tooth count is right and a modulus of 2.0333... would be unusual to say the least; so it's probably the pitch diameter that is dimensioned wrong. Could be that a gear with 36.0 pitch diameter is being run at 36.6 operating pitch diameter (you'll have some backlash but it should still mesh.)

Any info on the gear that meshes with this one? As I said before they should have the same module, same pressure angle, and if you know the (operating) center-to-center distance, that should be equal to half the sum of the two (operating) pitch diameters.

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I know take off and landing are the most dangerous parts but if a passenger needs to alert a cabin member during take off of something then it is far too late to do anything anyway. I think I am going to go with the rescue effort reason I'm afraid. Thanks for the guesses guys

Shutters are opened (and the cabin lights dimmed at night) so that in the event of an external fire (e.g. an engine fire) on the ground, one can see which exits are clear of fire and which are not.

Take a glance at the photos in the report of the Manchester Airport British Airtours 28M disaster, and all becomes v clear who survived while getting out and who died
(The bottom of Page 6 of the report also tells you why you want a big, strong, switched-on type sitting beside the overwing exits...)
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