[jan111]

I have 44 different engines that I use in Player consists. I have adjusted the notch value in the engine controllers in these engines so each notch gives a desired certain speed.
I still run Open Rails version T1.4-55-g04375e66f.
Why?
Because every time I have updated to a newer version the running speed for each notch has changed dramatic.
Are there any explanation for this as I dont want to have to change engine controllers in 44 engines for each update

[Weter]

Hello.
I guess, more advanced adhesion model

You can see changes list on OR.org site for learning other potential reasons.

[R H Steele]

jan111, on 05 June 2023 - 10:35 AM, said:

I have 44 different engines that I use in Player consists. I have adjusted the notch value in the engine controllers in these engines so each notch gives a desired certain speed.
I still run Open Rails version T1.4-55-g04375e66f.
Why?
Because every time I have updated to a newer version the running speed for each notch has changed dramatic.
Are there any explanation for this as I dont want to have to change engine controllers in 44 engines for each update

It is my understanding that each notch provides a desired power-not speed to traction motors. Besides various other sources, this is described in the manual in the section pertaining to the ORTS Diesel Engine Definition. This applies to a diesel-electric locomotive, perhaps it is different for an electric -- my assumption is that it's not.

[Weter]

It's definitely so.
For precise speed maintaining the more complex systems needed, which are cruise control.
While basic ones determine (and quite rough) only power input (output will vary)