[Laci1959]

 engmod, on 03 April 2022 - 12:46 PM, said:

I too am looking forward to the outcome of this effort.
Up to this point I have only used the simple adhesion model as the advanced model did not work well enough for me.

A lot depends on the proper setting of the vehicle. Rolling resistance (ORTSDavis), traction (ORTSCurtius_Kniffler), spindle deceleration (ORTSInertia).
The setting that is good for everything is not good for anything.
The eng wag builder should take the time to review these parameters and correct them as needed.

[mozdonyos]

Hi cesarbl!

Thank you very much for your help with the diesel mechanical locomotive topic.
With the latest update, my simulation has been greatly improved using the ORTSInertia command, and the wheel slip also seems stable.
If I use all the parameters related to traction and take my own driving experience into account when setting the values, I get a very close simulation in all weather conditions.

Thank you for your work, further successful development!

[cesarbl]

I also reduced the default inertia value, so that users get more accurate results without having to modify the inertia, as that value is not usually available in technical documents.

[Laci1959]

 cesarbl, on 04 April 2022 - 11:21 AM, said:

I also reduced the default inertia value, so that users get more accurate results without having to modify the inertia, as that value is not usually available in technical documents.

Perhaps a time interval should be specified during which, after setting the throttled wheel to zero (Throtle), the wheel will pick up the rolling speed corresponding to the speed. Drivers know and feel this from experience.

[cesarbl]

Hi all,
It has been reported that there are some fake wheelslip alarms when starting the train. I tried to solve that in the unstable release. Could you try that?

[darwins]

I have not seen this in the regular unstable version, but this did happen to a small loco I tried in the MG version.

[engmod]

 cesarbl, on 03 October 2022 - 10:37 AM, said:

Hi all,
It has been reported that there are some fake wheelslip alarms when starting the train. I tried to solve that in the unstable release. Could you try that?

I will try that today for you. Is that in u2022.10.03-2052?

[engmod]

Hi Cesar,

I tested u2022.10.03-2052 and did not get any traction warnings.

I include a log file and the eng file that I used.

Attached File(s)

•  04-Oct-79 2022-10-04 09.50.20.txt (11.7K)
  Number of downloads: 131
•  DO_FJG_100.eng (22.09K)
  Number of downloads: 135

[engmod]

Hi Cesar,

I am testing advanced adhesion with AC loco ( sd70ace ) with ORMG 136.1.
I have loaded a heavy train and going up a hill.

When I slow down for a red light, I go under 5mph at notch 4 ( sander on ), the wheelslip goes silly, slip-end slip-end, you can see tractive effort going up and down.
I would not have thought that at notch 4 you could get wheelslip as the power level is too low.

Once you want to go to notch 5, the wheelslip stops?

Attached File(s)

•  avr_cofc-east 2023-01-20 13.06.10.txt (12.77K)
  Number of downloads: 99
•  MRL_SD70ACe_4408.eng (35.73K)
  Number of downloads: 106