View single post by Richard A-J
 Posted: Fri Oct 27th, 2017 08:32 am
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Richard A-J


Joined: Wed Feb 22nd, 2017
Location: United Kingdom
Posts: 15
Hi Woodie - oh I am a great believer in flywheels, and they have to be bigger than the motor. I have converted to battery powered radio control so the dirt problem does not bother me but I still believe in flywheels because their main function is in modelling inertia. Yes inertia is 'cool', that's because it models the real thing. The way I see it, to not give a model 'scaled' inertia is like not giving it wheels .... eeeek!

Michael - I think I am beginning to see the problem. Is it true that DCC controllers only allow an on / off facility for inertia whilst driving? You can't adjust it easily whilst driving? You have to go into the CVs. Therefore if you've got the inertia set for a heavy train you are, in effect, stuck with it even when your engine is light. It seems to me that this is a failing of DCC controllers. They need to add a means of adjusting inertia easily whilst driving, but I repeat, there should be no zero inertia available because zero inertia does not exist. Here's my radio transmitter which I posted in another thread:-

As I mention in the accompanying blurb, the top right dial is the inertia dial. As bought the dial was able to be turned anticlockwise to take that white dot to the 7 'o'clock position, but that gives zero inertia. I have therefore adapted it with the screw so that the lowest inertia setting is now at 12 o'clock, which represents the inertia of a light engine. So now, at its lowest setting (12 o'clock) it can buffer up more realistically as a light engine and stop relatively quickly (remember it still has inertia - light engine inertia). When the loco is then pulling a load it is easy enough to then turn the dial clockwise to represent the now changed inertia using my own judgement dependant on weight of train.

I recommend DCC users badger your DCC suppliers for an inertia dial on your controllers so that inertia can be easily adjusted whilst operating rather than being stuck with whatever the CV is programmed to. Actually, I remember my NCE controller had a button called Option and I recall I used that as my emergency stop button because it gave a modelled emergency stop rather than a 'toy' stop. Perhaps that could be used for light engine buffering up in the meantime if your DCC controller does not have easily adjustable inertia.


Last edited on Fri Oct 27th, 2017 08:38 am by Richard A-J

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