Aotearoa Weekly Kōrero 8/7/2024 (lemmy.nz)

submitted 4 months ago by Dave@lemmy.nz to c/newzealand@lemmy.nz

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Welcome to this week’s casual kōrero thread!

This post will be pinned in this community so you can always find it, and will stay for about a week until replaced by the next one.

It’s for talking about anything that might not justify a full post. For example:

Something interesting that happened to you
Something humourous that happened to you
Something frustrating that happened to you
A quick question
A request for recommendations
Pictures of your pet
A picture of a cloud that kind of looks like an elephant
Anything else, there are no rules (except the rule)

So how’s it going?

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[-] Dave@lemmy.nz 3 points 3 months ago

I guess the question is how to efficiently heat the lines. Not really feasible to install fan heaters all the way along. Heating up the wire itself may not be that easy.

I went looking and found that some solutions are to either use a specially equipped ice cutting diesel engine, or some trains have a separate pantograph (the thing that goes against the wire) that is designed to scrape the ice off just ahead of where the power collecting pantograph is. Some interesting bits in this blog post.

It links through to this page that has photos of the ice cutting pantographs, though not in action.