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

I was once told that it is associated with longbows, where captured archers would have their fingers removed.

The two fingered sign was to say to the enemy I have my two required fingers to pull back the string on my longbow.

And some like the australian aboriginese use the same word twice to indicate more than one.

Frankly, I doubt he will understand anything.

The left hand side wheel nuts on Chrysler vehicles are left hand thread. Is that still a thing?? Not worked on Chryslers for decades.

The people who know what they are doing don't seem to have an issue.

Bi-directional blades wouldn't be able to efficiently use the airfoil effect both ways so flat blades will be equal efficiency both ways.

That said, the ceiling fan above my head has airfoil shaped stainless steel blades and it can be set for both directions of rotation. Obviously preference made for the primary flow direction - down!

Yes, and don't use a lot of power either.

Metal wheels on metal tracks equals reduced friction (rolling resistance). You sure don't sound like you've ever done any engineering since most engineering niceties have you knackered!

You've noticed! I had thought you were living in the 16th century.

The small contact area and the great mass of a train is what does the trick.

Ever thought about why roads tend to go over hills and railways tend to go straight through? It's all about efficiency and is one of the reasons why motorways, freeways and the like tend to also run the most level path practicable.

Loco wheels most certainly do have springs. Just because you can't see them doesn'nt mean they aren't there - somewhere. Without springs you would be cracking wheels, axles and frames all too frequently. Also, without springs, you wouldn't be able to keep the loco on the track.

For your edification;

The driving axles on locos tend to be *equalised*.

Depends on where in the USA you were. Otherwise these wouldn't have been needed.

Why is it I can envisage you doing just that? If people want me to wear a mask, I oblige and I keep one in my pocket just for that purpose. It's called manners. You may not have heard of such a concept where you come from.

Pretty much the same here. I was discharged from hospital 2 days ago, my

Most assuredly. I wear the mask out of consideration for others.

I'd have said *pig ignorant* but dumb will suffice.

That settles it - you have never studied engineering - in any form.

A sealed environment where clearances are controlled, lubrication is assured and contaminants excluded, not a problem. Now, think how that differs from the cogs in a rack railway system. And that's just for starters.

Stick train wheels on your car, run it on rails, learn the difference. Rolling resistance is what you need to note here.

BTW, we in the land down under are one step ahead of you. Where we need to run a road vehicle on rails, boy, do we have it covered!