Why do circuit breakers go up for on and down for off?

Make them climb poles. The polegasms would be interesting.

Not here anymore. Was a few months ago, I ignored the rule, nobody said a thing.

They can wear their own mask.

Isn't there something about more friction between similar metals? Clock mechanisms usually have steel spindles in brass bearings.

Have a look at the grippy wheels on big trucks. Just not feasilbe on trains.

Clocks are very different to trains. Rain wheels have immense loads on them.

Sure, get a "grippy" material that can hold >100 tons (>200,000 pounds) in a single car with 4 (or even 6) axles, and maybe you have an idea.

Oh, and it has to have a service life of a quarter million miles (minimum).

Road vehicles also don't weigh in at 100 tons, or try dragging 100x cars (at 100 tons each) behind a couple of tractors.

Hirail trucks are simply too light to move railcars -- they're usually nothing more than a F250/350 (or equivalent) with the rail wheels. Now there are (were) some specialmade vehicles that could move one or two railcars at a time ... at yard speed.

Most are...

The point is you want *minimum* friction in a clock (or any journal) bearing.

And the other point is, the load on the bearing is deeply significant, which is why (almost*) no piston engine uses roller or ball bearings routinely on a crankshaft.

When I bought my first bike I called the insurance man. He asked what the displacement was and I said 74. He asked "cc's?". Nope. In its day 1212 cc's was considered a large motorcycle engine.

If you think about it the real problem is getting a circular bearing onto the crankshaft. However, if the engine case splits perpendicular to the crank and there are no middle journals, no problem. In the case of the Harley design where the entire crank is assembled and not cast as one piece, there's no reason not to use needle bearings on the conn rod big ends.

Harley certainly isn't the only one. Most older bike engines used them. I won't say 'all' but they are still used for dirt bikes like my 650cc Suzuki thumper.

Smaller contact area doesn't change the friction one bit. Friction is directly proportional to the force. If you halve the contact are, you double the force, but you halve the area with friction. Same result.

I didn't insist they took theirs off.

Why bother? I don't wear a shirt and tie when asked to.

Surely deliveries go outside cities. Maybe you pay a bit more, but your house is way cheaper.

Being nice to someone gains you nothing, chances are they won't be nice back.

I call that a shithole. Countryside is much nicer.

If you want me to be more skilled at it you need to teach by example.

Here, we don't need amps. We have decent transmitters in the first place. Or TVs designed to amplify inside them instead of farming it out to another box.

She doesn't need to understand, her TV does.

You probably would need an amp if the signal is split between nine TVs. And you still have to stop idiots from shorting out their aerial sockets, accidentally or deliberately.