I saw the chassis photo in another thread and it looks very workmanlike. Sounds like you are happy with how it runs.philipy wrote: ↑Fri Sep 16, 2022 5:04 pm If you remember, my original plan was to to use a 30rpm N20 Gearmotor, but trials showed that was too slow even for this wee beastie, so I swapped it for a similar 100rpm version. Going flat out ( ie no motor speed control) it is now perhaps just a tiny bit fast, but it should just about be spot on with the rc control, in due course.
Running a small loco at 30rpm at the wheels means it would take about 20 mins for one circuit of my backyard at a scale speed of about 1.5 mph, with the motor doing an imitation of a dentist's drill. In wet weather the snails would be overtaking it on the outside.....
Even back in my days working in HO, I never understood why british modellers insisted on slow running by using very high reduction gear boxes with the motor screaming its head off at max. revs. I like things to run nice and quiet and set my mechs up with lower reduction ratios and run the motor at half the rated voltage. The motors don't wear out as fast and now with battery power I don't need to find space for as many cells, especially in the small railmotors I like to build.
What Rx were you planning on using? I bought a couple of the RSC version of the new Micron MR603a, one of which was intended for use in a railmotor. What doesn't show in most of the photos is the electrolytic capacitor on the back of the board, which made it too large to fit in the intended model.
Regards,
Graeme