Edith locomotive

[MRail]

Quote:
by Busted Bricks » Thu Mar 05, 2020 9:19 pm
It might be hard to tell from the picture but the chain used is steel roller chain, not Delrin chain. Sprockets are also steel.

May I also ask about source of chain/sprockets.
In my trawlings, 3mm pitch roller chain seems phenomenally expensive.

Delrin is too flimsy for my garden line, constantly stretching and eventually breaking under load.

[Peter Butler]

Thanks for correcting me, I see the information was given earlier in the thread and I missed the point completely. I am not an engineer and passed over such detail with little interest. I have used Delrin chain and sprockets myself and found it perfectly sufficient for my needs, but my locos are made of HIP and don't haul heavy loads so in that instance I find it works.

IMG_7118.JPG (117.76 KiB) Viewed 3562 times

[MRail]

My experience with Delrin is on an Essel chassis under a converted HLW Mack body.
It has the grunt to recover gassed-out steam locos, but the Delrin, as mentioned, progressively stretches.
Eventually, a link can be removed, but the process continues. After removing a second link, the chain breaks.
So, replacing with a new chain starts the process again.

I spoke to Stephen Lacey, who said I'm working it too hard!

I'm a bit dubious about Roundhouse saying their battery locos are equivalent to their steamers.
Hercules uses Delrin.

Ladder chain on sprockets is a little too coarse.
The roller chain used on the SloMo device looks ideal, but I can't find its origin.
Something similar is available in USA, but around £90/foot.