[Laci1959]

Hello.

I would add to this the small thing that derailment is only true for vehicles with a central collision towing device.
The value of ORTSLengthCarBody for vehicles with a plate stop is only:
1. the length of the car body,
2. the length of the car body + the length of the rigid part of the corner stops
3. the length of the car body + the length of the rigid part of the corner stops + the length of the stop plates which can be pushed against the spring when the spring is released, ie the total length of the shape in general.
Since the OR does not know the push-in bumper is perhaps the 3rd possible choice.
What ORTSLengthCouplerFace determines:
4. The vehicle does not use its bolts because the bolts of both adjacent vehicles are engaged.
5a. The vehicle only uses the front screw terminal.
5b the vehicle uses only the rear screw terminal.
6. use both bolts of the vehicle, in which case one of its neighbors will not use the bolt on that side.

The point of intersection of the screw terminal, the hook, acts as a kind of pivot point in the arcs. In the case of 5a, 5b the length is the same, only it is offset from the pivot point.

Sincerely, Laci1959

[Lamplighter]

European vehicles use buffers and chain couplers.
Does this better not using derailment parameters OR for European vehicles?
Even then, I don't understand how OR uses vehicle resistance and adhesion calculations if the ORTSNumberAxles parameter is (0).
For the locomotive shown in the example, the latest version of the Open Rails manual will apply ("The total number of axles on the locomotive will be
ORTSNumberAxles + ORTSNumberDriveAxles. ") Therefore ORTSNumberAxles ( 0 ).

[Laci1959]

If I understand correctly, the two parameters are the rolling resistance parameters. The fact that the derailment can also be used is another matter.
What strikes me now as well (sorry for using the slang) is that if the locomotive is not towing because it is being transported cold, how will the traction resistance be calculated if ORTSNumberAxles () is zero. This is also the case for running before stopping.
Maybe this post should be in a different thread?

[Lamplighter]

Laci1959, on 17 April 2022 - 02:50 AM, said:

If I understand correctly, the two parameters are the rolling resistance parameters. The fact that the derailment can also be used is another matter.
What strikes me now as well (sorry for using the slang) is that if the locomotive is not towing because it is being transported cold, how will the traction resistance be calculated if ORTSNumberAxles () is zero. This is also the case for running before stopping.
Maybe this post should be in a different thread?

I agree. E.g. OR - General Feedback.
Much has been written on this subject, but there is still uncertainty.
It is certainly certain to use the ORTSNumberAxles () parameter on towed vehicles. This is the number of all axles.
I'm not so sure about traction vehicles that only have drive axles or a combination of drive and trailed axles. Especially for vehicles with all drive axles. According to the manual, the ORTSNumberAxles parameter should then be (0).
How are all other parameters related to the number of axles then calculated? Is the ORTSNumberDriveAxles parameter from the Engine section used? Can it be relied on?

[steamer_ctn]

Lamplighter, on 17 April 2022 - 01:42 AM, said:

Even then, I don't understand how OR uses vehicle resistance and adhesion calculations if the ORTSNumberAxles parameter is (0).
For the locomotive shown in the example, the latest version of the Open Rails manual will apply ("The total number of axles on the locomotive will be
ORTSNumberAxles + ORTSNumberDriveAxles. ") Therefore ORTSNumberAxles ( 0 ).

Within OR the number of axles on a car / locomotive has no impact on the train resistance. Train resistance values are calculated external to OR by the content provider, and inserted into OR via the Davis values. Similarly adhesion is calculated via the Cutius-Kniffler formula, and hence is also independent of axle numbers within OR.

As you have indicated the total number of axles on a car is the sum of the two axles, Hence as you suggest ORTSNumberAxles can be zero.

[Lamplighter]

steamer_ctn, on 18 April 2022 - 12:09 AM, said:

Within OR the number of axles on a car / locomotive has no impact on the train resistance. Train resistance values are calculated external to OR by the content provider, and inserted into OR via the Davis values. Similarly adhesion is calculated via the Cutius-Kniffler formula, and hence is also independent of axle numbers within OR.

As you have indicated the total number of axles on a car is the sum of the two axles, Hence as you suggest ORTSNumberAxles can be zero.

OK. So all you need is the ORTSNumberAxles parameter in the Wagon section and the ORTSNumberDriveAxles parameter in the Engine section.
And assign them the correct number of axles according to the actual condition of the locomotive or railcar - the number of axles trailing + the number of driven axles. The number of trailing axles can also be zero.
Thank you for the explanation.

[jaytrain2]

On the subject of derailments...



The train just stopped at the end of the tracks! In the MSTS days, you could play Silver Streak or Tough Guys with the trains! Quite disappointing...

[Weter]

Developres decided, it will be so. zip.
Also, no derailments in curves due to overspeed. Only brake hoses disconnection.
Somehow disappointed too. In other cases - it's better.

[ATSF3751]

Minor derailments would be nice to have but that is not the focus of the Open Rails team and never has been.

Brandon

[Jonatan]

Derailments keep you on your toes and make you try adhere to speed limits, but an option to turn them off like in MSTS would be required.