Super Elevation

[charwashjohn]

I am clueless on how to implement superelevation. I am using TRS22 and I impute the number and nothing seems to happen. Do I need to put the number on both ends of a segment of a curve? Anyone and expert?

 

[ajrf]

Are you using double tracks/bridges?

 

[danddhud]

I put spline points in the curve itself and don't add anything to the end points. Depending on the size of the curve I set the superelevation degree from 1.0 to 7.0 and I might add higher numbers to the points in the center of the curve and go to a smaller values as I get closer to the ends. I set the superelevation limit from 1.0 to 1.5. I know it's not a scientific approach but it works for me.

 

[mapsgame]

The Trainz Wiki has information on superelevation. https://online.ts2009.com/mediaWiki/index.php/HowTo/Use_Superelevation
There is also a link in the Wiki article to an excel file that calculates the p1 (degrees) and p2 (Limit) values for your track curve radius and speed. Note that the spreadsheet uses a coma in place of the decimal point.

In TRS22 create a curve with multiple splines and two tangent splines at each end of the curve. Straighten the tangent splines using the straighten tool. Place a long ruler 90 degrees to the first tangent/curve spline point and a long ruler at 90 degrees to the curve/tangent spline point. Use F9 key to see the grid to help with being 90 degrees to the tangent tracks. The two rulers will intersect at the curve vertex. Add a 3rd ruler from the vertex to the middle of the track to measure the radius. With the radius and desired speed you can use the spreadsheet to calculate the p1 and p2 values.

Select the track. Open the 'Advanced' tab for the track and click on the "question mark", then click spline point of the first tangent/curved track. Enter the spline point superelevation 'degrees' and 'limit' per the calculation. Click save in that dialogue box. Move to the next spine point of the curved track and repeat setting the superelevation values at each curved track spline point and the last spline point of the curve/tangent track. Remember to hit save for each modified superelevation. To check that superelevation is working in Trainz greatly exaggerate the p1 value along all the curved track spline points and you will see an obvious tilt to the rolling stock. Note superelevation has a max value.

 

[charwashjohn]

Are you using double tracks/bridges?

Nope, Single track. I am using JR NS track, mostly 3 and 4

 

[charwashjohn]

The Trainz Wiki has information on superelevation. https://online.ts2009.com/mediaWiki/index.php/HowTo/Use_Superelevation
There is also a link in the Wiki article to an excel file that calculates the p1 (degrees) and p2 (Limit) values for your track curve radius and speed. Note that the spreadsheet uses a coma in place of the decimal point.

In TRS22 create a curve with multiple splines and two tangent splines at each end of the curve. Straighten the tangent splines using the straighten tool. Place a long ruler 90 degrees to the first tangent/curve spline point and a long ruler at 90 degrees to the curve/tangent spline point. Use F9 key to see the grid to help with being 90 degrees to the tangent tracks. The two rulers will intersect at the curve vertex. Add a 3rd ruler from the vertex to the middle of the track to measure the radius. With the radius and desired speed you can use the spreadsheet to calculate the p1 and p2 values.

Select the track. Open the 'Advanced' tab for the track and click on the "question mark", then click spline point of the first tangent/curved track. Enter the spline point superelevation 'degrees' and 'limit' per the calculation. Click save in that dialogue box. Move to the next spine point of the curved track and repeat setting the superelevation values at each curved track spline point and the last spline point of the curve/tangent track. Remember to hit save for each modified superelevation. To check that superelevation is working in Trainz greatly exaggerate the p1 value along all the curved track spline points and you will see an obvious tilt to the rolling stock. Note superelevation has a max value.

I Understand this part but the numbers do not give the lift that I was expecting.

 

[mapsgame]

I Understand this part but the numbers do not give the lift that I was expecting.

What are the curve radius and speed for your curve? What p1 and p2 values are you using?

 

[danddhud]

I should have said I add spline points in a given curve. And then I only change(add the superelevation values) to those points and not the end points. It's not the superelevation limit so much as the degree amount that will change the angle of the curve.

 

[mapsgame]

I should have said I add spline points in a given curve. And then I only change(add the superelevation values) to those points and not the end points. It's not the superelevation limit so much as the degree amount that will change the angle of the curve.

In railroad design the superelevation begins at the tangent/curve track interface (called the point of curvature 'PC' in surveying) and ends at the curve/tangent interface (called the point of tangency 'PT' in surveying). This link will help explain superelevation. https://blog.model-train-help.com/2019/06/super-elevate-track-trains-moving-curve-speed.html

I found post #6 in the link where Trainzer RPearson provides very detailed calculations of superelevation he also gave 'simple formulas': https://forums.auran.com/threads/id...for-american-standard-gauge-mainlines.164300/

 

[danddhud]

Thanks for the info. I've looked into how real railroads determine how to figure things out.
I'm simply sharing what works for me and keeps things from getting too technical. When working on large routes I needed a way to come up with a system that's easy.