I've got a Portram I'm hoping to use to power an N gauge tube train I'm building at the moment, and I've got a few of questions about the bogies that hopefully someone can answer for me.
Firstly, are the brass tabs which stick out the top of the bogie part of the pickups from the wheels? Would they be a good place to attach wires from extra pickups on the unpowered bogies to feed into the motor?
Secondly, can anyone recommend a good way to attach the bogie to the chassis so it rotates freely? Trying to recreate the tab system seems a bit tricky, and anyway it only allows fairly restricted movement, suitable for a short articulated tram but probably not a longer tube car. I'm wondering if maybe gluing a 12BA nut to the top of it, into which I would screw a bolt passing through a hole in the chassis, would work?
Finally, just how much weight can a Portram bogie pull along the track? I expect a six car train would be too much for a pair of them but do you think they could manage a four car unit between them?
Thanks for your help,
Paul