Captain Poni 🛤️ is a user on You can follow them or interact with them if you have an account anywhere in the fediverse. If you don't, you can sign up here.

Remember class 242?

It has another amazing acoustic feature I didn't mention the last time.

It's designed to work with 25 kV AC, now, what's the one thing this voltage, alternating, does? Arcs. It's not easy to disconnect two pieces of a circuit without an electric arc.

So there is actually a chamber inside that does that. Arc happens there, but it is contained.

It's also loud. So of course the driver had to do it when I was walking next to the locomotive.

@pony I can sometimes hear the arc at the main station here when they lower the pantographs for mainline trains to/from London (UK also uses 25 000V AC for all overhead railway power) but it never seemed that loud to me. We still use these old things. I am not sure how the noise/flash is suppressed (or even if it is at all).

Captain Poni 🛤️

@vfrmedia it may seem old but it's still a generation ahead of these, they are from early 80s and it's not a new design, just a simplified variant of an even one model.