Defining double slip turnout

I am redefining the turnout library for Dutch turnouts, because they aren't correcht.

For the single and dobule turnouts I managed to get it correctly. The slip starts at the right side of .1 point (aprox 1.225m) with a ratio of 1:100 or 1:200 and sometimes has multiple radii or transitions in it.

For the double (and single) slip turnout I try to define the turnout according to the following sketch:

The drawing can be horizontally and vertically mirrored. All four sides are the same.

I managed to let the slip start on the left side 6,76 behind point .1 (and point .2) and get the ratio of 1:100 and radius R=204 defined in the branches. But I can't define the 1:100 ratio on the right side.

Is there a way to get this done?

Greetings,

Wess Wesselink

Designer at Sweco Netherlands

  • What is the type of geometry for the 0.8165 length element? Straight? If yes, it means that the only way is to put a ratio at .1

    But in this case, the other issue is that you say it is symmetrical. So we should also have an angle on the heel of the branch. That is not possible actually. In this case, it would need an enhancement request to be able to create such turnout..

    So I think it is not possible to create this one with the exact geometry. Straight 5.53643 R204 22.57407 Straight 5.53643 allows to fit between .1 and .3



  • The problem is exactly as you described. The branch has a straight with ratio 1:100 a curve and a straight with ratio 1:100. In the description of the turnout I entered the following values: theoreticalToActual="-6.760000", ratioAt0="9.000000" ratioAt1="100.000000" 

    This works fine for the left side of the turnout.

    Maybe I should ask for an enhancement request to make it possible to add the variables ratioAt3 or something.

  • Yes it needs an enhancement request with an accurate description of the turnout and points/geometry required. Maybe additional information to elements could be added to allow an angle (or ratio) between elements to allow more freedom to create true geometry.

    Meanwhile, I would say that civil cell could do it or even geometry construction if this type of turnout is not used too often.
    An average geometry is the best to keep using a turnout object.