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Are your motors powered by overhead rail? They look fantastic!
Key System Unit at Patton St. crossing in Rockridge
Wow these are neat! Is the overhead wire powered? I am very unfamiliar with O scale traction.
Yes. All my trolleys have uninsulated wheels and pick up from the overhead wire.
Some guys run trolleys as 2-rail, but then if the pole or pantograph snags the wire, it can cause damage. Picking up from the wire means if contact is lost, the train stops.
Besides, if you need the wire to run the train, that gives an incentive to maintain it in good shape. You do need to keep the wire clean for good electrical contact. But there are various ways to deal with that.
My layout can also can run 2-rail, but of course not at the same time as trolley. And it can operate either as DC or DCC. I am slowly converting my trains to DCC.
Do you build your own overhead supports?
Yes, the crossarms with insulators are from Weaver kits. The poles are 1/4 inch dowels, tapered by putting them in a drill in a vice on my workbench and using sandpaper. The bracket arms are rail, the fittings on the arm are brass castings from Bronze Key (no longer available, I got his last ones).
Improvements at Rockridege (Patton St. crossing)