As I see it the biggest problem with RC is how in an emergency even with an H bridge do you insure that the power is totally cut off to the motors ? Even if there is a dedicated channel holding on a master control circuit I suppose you could argue that even that may go wrong with interference or suc...

I must admit that my thought were not with RC locos but with ordinary hand held controlled ones. I use a hand held control which has a kill switch wired in with the potentiometer and also plugs into a Din socket so either if the switch is thrown or the plug pulls out then the loco will stop. It seem...

Over the years I have designed and built about half a dozen electric powered locos and I do not think a relay as a cut off switch is a very practical idea. One of my Locos Western Lady which was featured in Turnout some years ago as the loco with the split personality has six motors. The electrical ...

I usually just run a drill down through the screw hole in the eccentric to put a decent dimple in the axle for the grub screw to bite into.
My ultimate method if the axle can be totally de-oiled is after making the dimple, use a syringe to pump some Loctite down the screw hole.

Hi Andy, I think what Dave did not clarify, is that the bogies need to be able to roll on the longitudinal axis in order to accommodate changes in cant of the track. If they cannot flex then you get exactly the problem you describe of derailments as the flanges ride up. Exactly the same problem also...