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What speed table curve would be best for a loco doing switching at local industries.? It would never be pulling a train on the main.? Just switching 8 industries in a town.? I see some curves are logarithmic and some exponential.? Engine is equipped with a Tsunami sound decoder.?

Thanks, in advance, for any help.

I found the default 28 point speed table for TSU 2 to be fine. Please note I use the protothrottle and under factory config for TSU2 the top speed is 36 scale MPH (speedstep 49 of 128)(This actually looks faster on a layout as well)). I do use max momentum so that helps making it slow. You could cut everything in half on the chart and it would theoretically go 20 MPH or less at top speed. Within JMRI you can adjust the speed steps to the engine RPM as well, so it could be even slower. ?

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Here is the option under sound tab in JMRI:

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First of all. All caps is shouting.

I can tell you what I do. My diesels are set CV 2,5,6 at 2,50,100. Because they are "GP's" and do run main.

My steam that I use 99% for switching are set individually. Originally, CV2/starting is set for each loco and might be from 2 to 5. Then, I set CV5 at 50 and CV6 at 25. But that is the simple way.

OTOH. I use a DCS50/or UT4D for throttles. And the DCS50 has numbers to 6. So, to be honest, I seldom ever get get beyond 3. So I think that CV5 or 6 don't matter that much.

As for a speed table. I tried that, again with CV2 set individually. and the top speed at something low like 50, and then just "match ends". The alternative to that would be to set speed table 2 again to the CV individually. (Each loco I have seemed to have slight differences in start voltage. Some 2, some 5 and in between.) Then set speed table 128 at whatever you feel is about as fast as you would ever go. And then set the speed table with "constant ratio curve". Try both and see which you like best.

On my Bachmann that has no speed control, only CV2, start voltage. I got the CV2 set and then. All I can do is use the throttle by setting it at #2 on the DCS50 throttle and leave the speed alone. Using only the brake to switch back and forth from forward to reverse..

In all honesty, and I have been playing with switching for 6+ yrs on my little layout.? I prefer having a bit of momentum and being careful with both the throttle and the brake switch. And not leaving the speed alone. I do love working the knob as I run. And judicial use of the brake switch.

I hope this helps. i.e. I tend to be gentle with the pot on the DCS50 and UT4D. I've read too much about how they fail. Other throttles may be less prone to break. (The old pot with a stop position vs the continuous knob on UT6.)

I'm also sure that others will be responding with alternative ideas.

Morgan Bilbo, JAVA/ZULU 11.52.13 jre, JMRI 5.4.