[Laci1959]

Dear steamer_ctn

https://kephost.net/t/2021/39/3389_ae40dd1c0710.png
I drew a detail of the wheel profile outline to determine the ORTSWheelFlangeLength and ORTSMaximumWheelFlangeAngle.

https://kephost.net/t/2021/39/9251_65f42272c7fd.png

I ask you to check the horizontal line you referred to. Which I have to take the angle to. Maybe freehand the angle roughly. The purple dot line is the base line that is also mentioned in the linked document. The solid green line is the outer tangent of the wheel profile. The extension of the line (red line) connecting the two arcs closes 59,285 degrees with the baseline. I'm sorry, but I didn't draw this.

Sincerely, Laci 1959

[DirtyRam]

Good day, here's a google search page to some PDFs that may be of interest on this subject.
https://www.google.c...+Passenger+Cars
I figured it was easier to post the link rather than post different pieces of info from the PDFs.

Mike

[Laci1959]

https://kephost.net/p/2021/39/2825_222bb22cea8c.png

I refined the drawing a bit.

[steamer_ctn]

Laci1959, on 03 October 2021 - 08:45 AM, said:

I refined the drawing a bit.

My interpretation would be that the flange angle is 62 degrees.

The 26.6 deg represents the base (reference) line from where the flange angle is measured.

To be 100% certain I would suggest that a google search be done to find a specification sheet for wheel profile in question.

[Laci1959]

steamer_ctn, on 03 October 2021 - 01:42 PM, said:

To be 100% certain I would suggest that a google search be done to find a specification sheet for wheel profile in question.

I've tried this before. There is only a general drawing on the net that I showed in my first picture. It is used by skilled workers and in university education. The MÁV Documentation Center only stores production documentation. They have a lot of size data, but those two data don’t. Specifies the total angle, radius, and center of the rounding. Half of the total angle falls towards the track center, so it has no role in the formation of glide. Then after that, when the wheel falls off on the other side.
So unfortunately, this attempt of mine ran aground.

[Laci1959]

Quote

My interpretation would be that the flange angle is 62 degrees.

Considering the mathematical rule of rounding, it is rather 61 degrees.
Based on this, ORTSWheelFlangeLength (0.020m) will be.
ORTSWheelFlangeLength = the length of the line connecting the two arcs, + the length of the arc from the end of the line to 26.6 degrees.

[Lamplighter]

Hi!
What should the entry look like for a standard two-axle wagon?
So a wagon without bogies.

Which listing is valid?:

ORTSLengthBogieCentre ( 0m ) # no length bogie centre
ORTSLengthCarBody ( 12.9m )
ORTSLengthCouplerFace ( 13.97m )
ORTSNumAxles ( 2 )   # two-axle
ORTSNumBogies ( 0 )  # no bogies
ORTSWheelFlangeLength ( 0.02m )
ORTSMaximumWheelFlangeAngle ( 70deg )

or

ORTSLengthBogieCentre ( 8m )  # wheelbase axles
ORTSLengthCarBody ( 12.9m )
ORTSLengthCouplerFace ( 13.97m )
ORTSNumAxles ( 1 )
ORTSNumBogies ( 2 )   # bogie as an axle
ORTSWheelFlangeLength ( 0.02m )
ORTSMaximumWheelFlangeAngle ( 70deg )

What would the notation look like with a three-axle wagon?

https://www.modellbahnfrokler.de/modell/ab3uvorbild1608.jpg

[Laci1959]

I edited ORTSWheelFlangeLength and ORTSMaximumWheelFlangeAngle. This can be seen in post # 73.
The value edited there is valid for today's railway cars. The Apta wheel profile is similar but not identical. Unfortunately, even though I set the editor to Anglo-Saxon, I can't handle it.
Hmm. so what about ORTSNumAxles now?
So far, I have known that a calculated value that does not need to be entered is calculated by the program. Instead, you need to specify the value of ORTSNumberAxles, which is used by another thread if I know it.
Now the chaos in my head is complete with this.

[Lamplighter]

The code is from a contemporary car, the image is illustrative.
ORTSWheelFlangeLength parameters a ORTSMaximumWheelFlangeAngle does not need to be addressed.
I don't know how to use derailment on cars without bogies. How to apply the ORTSLengthBogieCentre, ORTSNumAxles, and ORTSNumBogies parameters.

[Laci1959]

For the vehicle shown in the picture, ORTSNumberAxles (3), ORTSNumBogies (1), ORTSRigidWheelBase are the distances between the two end axles. At that time, in the case of two- and three-axle wagons, the bearing housing had a loose fit in the bearing fork. This allowed a slight rotation of the shafts. It actually acted as an axle bogie.

https://kephost.net/p/2021/45/1810_a903e2e39138.png


If the design of the car is similar to that of the car shown in the picture, ORTSNumberAxles (3), ORTSNumBogies (3), ORTSRigidWheelBase would be half the distance between the two extreme axles. Of course, it would also be good if OR did not list this kind of hierarchy as an error.