Does it open or close?

I think close.

Open. Probably
Or possibly close…

Open (one of us has got to be right!) 😉

7th gear along jams and chucks off the rubber band.

Closes.

The two cross over ones cancel out and the two joined by a belt count as one.

Open. Apart from the second and third cog connected by a straight belt, each cog turns the opposite way to the previous one. 15 cogs including the input cog, hence 13 changes of direction and the final cog turns anti-clockwise.

I’m more intrigued as to what’s in the box. Fingers crossed it’s some 1980 hedge pron.

If /when it does open – is the cat inside dead or alive?

Trimix, I agree with your reasoning…..but still get open…

Hang on… its already open to start with.

That dead cat is going to be long gone.

What tyres for Jeremy Corbyn’s box which might open or close on a conveyor belt. And would it have done the opposite before BREXIT?

It’s already open.

At first glance it opens*, but that depends on if the ‘string’ attached to the lid gets wound** around the spindle of the last cog/sprocket or not. If it does then it opens, if in fact it winds round a bit and then slips off the end and goes slack as it comes back round then the lid will oscillate.

if ** is true then * is true eventually no matter what direction it turns, but if it goes the ‘other’ way to the image then it would initally close a bit, then open and keep opening as the string wound round the spindle the other way.

Yes.

I concur
Also

If /when it does open – is the cat inside dead or alive?

Took this picture on a recent flight. This was on the inside of the door. The button was on the outside.

Hang on… its already open to start with.

That dead cat is going to be long gone.

Nope

Took this picture on a recent flight. This was on the inside of the door. The button as on the outside

Did you kick the door open with your “special” shoes? 😉

Took this picture on a recent flight. This was on the inside of the door. The button as on the outside.

I hope you used one of your post-it notes to correct it?

opens

Is it an exploded diagram of a prototype 15 speed cassette? Only a matter of time..

It closes. I now need to find out. Can someone please built it?

Opens. Obvs.

🙂 Was wearing flip flops.

This is from the same trip, though,

😉

It opens even further and breaks the lid off.

If I made it – break.

Open, then lift the box up by the lid.

Did they ever fix the £2 coin, so that the cogs on the reverse of that could actually turn?

You seem to be assuming the box isn’t superglued to the floor and that the cogs are firmly attached in place.

This is from the same trip, though,

😆

Open

Open, easy peasy

Close 🙂

Open. Apart from the second and third cog connected by a straight belt, each cog turns the opposite way to the previous one. 15 cogs including the input cog, hence 13 changes of direction and the final cog turns anti-clockwise.

15 cogs -2 sprockets that are connected by the crossed belt = 13 cogs = 12 changes in direction ? last cog rotates same direction as first ? closes.

Crossed belt is the same as directly connected. It’s the uncrossed belt that’s made you wrong.

Iirc I had hundreds of this sort of thing to do during an exam/interview for the Navy.
Closes.

Two cogs joined by a crossed belt rotate on the same direction so they can be thought of as being one cog. So four cogs with crossed belts = 2 cogs. The cogs with the straight, uncrossed belt rotate in opposite directions so can be counted as normal 🙂

Ah- actually, you’re right and I’m wrong. Opens!!!

Open….

shermer75 – Member
Two cogs joined by a crossed belt rotate on the same direction so they can be thought of as being one cog. So four cogs with crossed belts = 2 cogs. The cogs with the straight, uncrossed belt rotate in opposite directions so can be counted as normal

Have a think about the chain on your bike…..and the consider revising this statement….. 🙂

Open. I’m right cos I didn’t try and use maths I just followed it with my finger! 😆

cw-ccw-ccw-cw-ccw-cw-ccw-cw-ccw-cw-ccw-cw-ccw-cw-ccw = open

It won’t take off, and certainly not from LHR, never going to get built this century.