Massive wheel slip problem : Need solution

[sumit7tnp]

Dear Sir,

Greetings..!!!

I need some advice on how to remove wheel slip problem. It is particular to one consist only.

I am attaching the log file.

I tried by pressing X (sander ) then also tried alt+X but problem remains same.

Please suggest what can be done in this case.

With Best Regards
Sumit Mehrotra

[ebnertra000]

It looks like you set your adhesion factor to 90%. I'd be surprised if you weren't just sitting there grinding off your wheels with a setting like that.

When it tells you "Good luck!", you'll need it

[sumit7tnp]

Dear Sir
Thanks for your kind reply.
Kindly suggest what should be the best value for Adhesion factor Correction & Adhesion factor random Change.
So that my wheel slip issue must be resolved.

Thanks in advance.

With Best Regards
Sumit Mehrotra

[ebnertra000]

It can be whatever you want, really. I'm using 150% adhesion factor with 10% random change, but I'm thinking of upping the change a little

[R. Steele]

Using 130% at 3% random change, totally agree with ebnertra000, make adjustments as necessary.

[baldwin]

I am using 100% with 0% change. Cannot see any point in going higher as that is moving into MSTS territory where wheelslip was non-existent with proper MSTS eng files.

@sumit7tnp
The problem may also be with your eng file. What loco are you using?.

[R. Steele]

...Cannot see any point in going higher as that is moving into MSTS territory...

More information, please - where's the basis for that? References to manual, other posts, developer statements...something so we can see where you are getting your information. Higher with regard to both settings or one of the two?
Defaults are 130% (correction) & 10% (change) - so an inference, from your statement, would be that these settings emulate MSTS?

Although the manual (X3804 draft, page 101) says:

It should be noted that the Adhesion factor correction slider in the options menu will vary the brakeshoe
coefficient above and below 100% (or unity). It is recommended that this is set @ the default value of
100%.

- However the Optional/Experimental tab script shows defaults as 130%, 10% - discrepancy or typo somewhere.

[superheatedsteam]

Check the eng file for the loco that is slipping.

I had the same problem and it was my NumWheels(?) parameter. It was set to 2 for some reason.

Unlike MSTS where NumWheels was sometimes given 'odd' values to improve performance, in OR, NumWheels should equal the number of axles on the locomotive.

Note that there are 2 references to NumWheels in each eng file, one in the engine and one in the wagon section.

Cheers,

Marek.

[baldwin]

More information, please - where's the basis for that? References to manual, other posts, developer statements...something so we can see where you are getting your information. Higher with regard to both settings or one of the two?
Defaults are 130% (correction) & 10% (change) - so an inference, from your statement, would be that these settings emulate MSTS?

Although the manual (X3804 draft, page 101) says:
- However the Optional/Experimental tab script shows defaults as 130%, 10% - discrepancy or typo somewhere.

My information is the slider. MSTS compatible is 160%, however to infer that my statement says that 130% emulates MSTS is incorrect. I said it is getting into MSTS territory, in other words it is not far off of MSTS style physics.

100% with 0% change is labelled as very hard, so in my view is on a par with proper strength couplings. At 100% I find it very easy to induce wheelslip with most steam locomotives when starting, whereas diesels are the opposite.

[R. Steele]

Check the eng file for the loco that is slipping.
I had the same problem and it was my NumWheels(?) parameter. It was set to 2 for some reason.
Unlike MSTS where NumWheels was sometimes given 'odd' values to improve performance, in OR, NumWheels should equal the number of axles on the locomotive.
Note that there are 2 references to NumWheels in each eng file, one in the engine and one in the wagon section.
Cheers, Marek.

NumWheels has little effect on Adhesion with Diesel Locomotives, OR uses it for Steam.
from this thread>>> http://www.elvastower.com/forums/ind...els%22__st__10

As suggested the NumWheels parameter has negligible effect on the OR diesel adhesion model, and it is used in the steam model.
As has also been suggested it indicates the number of axles, not the number of wheels.

This was posted in 2016 and I believe this is still the situation.

I have removed NumWheels from diesel engine files, with none to little observable change in the F5 extended HUD Train Force Information readings. Someone with more experience would probably discern more subtle changes than I can.

Best modifications to start with: (besides using the full kW or Hp power for the engine)
Use the ORTSAdhesion Curtius Kniffler numbers for both eng and wag files.
Use the ORTS Davis numbers (F2Calc will compute them) for eng and wag files.
Learn how to make "include files".

Depending upon the type of locomotive the addition of the "ORTSAdhesion ( ORTSSlipWarningThreshold ( 70 ) ) in the wag section and the addition of Antislip ( 1 ) and ORTS ( ORTSWheelSlipCausesThrottleDown ( 1 ) ) in the eng section can provide a more prototypical experience.

[R. Steele]

My information is the slider. MSTS compatible is 160%, however to infer that my statement says that 130% emulates MSTS is incorrect. I said it is getting into MSTS territory, in other words it is not far off of MSTS style physics.

100% with 0% change is labelled as very hard, so in my view is on a par with proper strength couplings. At 100% I find it very easy to induce wheelslip with most steam locomotives when starting, whereas diesels are the opposite.

Thank you for the clarification. Much appreciated. I had forgotten about my settings, which I had left at 130% 10% - looks like I'll move them lower and see what happens.

[sumit7tnp]

Dear Sirs

Greetingss...!!!

Thank you so much for your kind reply regarding my massive wheel slip concern.

Kindly find the attached .eng files where I am getting this concern.

Loco & Coach Zip name on trainsim is nozomi700.zip (japanese shinkansen).

Please suggest the change which I need to do in these eng files to get rid from wheel slip concern.

Thanks.

With Best Regards
Sumit Mehrotra

[baldwin]

Checking these units in real life, every car has 4 traction motors of 275kW each, or 1100kW per car. an 8 car set should have 8800kW total and a 16 car set would total 17600kW shared among the cars. The model is using 2 eng files with 11600kW in each, and the power cars are only just over 38 tons each. Too much power though too few axles with not enough weight.

So, make every wag into an eng, does not need a cab, and give each car 1100kW of power. Turning to NumWheels make the wag section 2 and the eng section 4 in every powered car of the train.

I have tried an 8 car consist with 4400 Kw in each power car. the throttle is still liable to give wheelspin if not treated with respect, but the set will reach design speed of 270kmh.

[sumit7tnp]

Dear Baldwin Sir

Thanks for your kind reply.

From your comments , I understand that I need to make my consists in a manner that there should be all eng files(no wag files).


Still It will be very nice if you can provide me your consist file which can give me idea very easily.(just for my easy reference)

Kindly provide Please.

Thanks.

With Best Regards
Sumit Mehrotra

[sumit7tnp]

Dear Baldwin Sir

Please reply.

thanks.