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 check rails and wing rails

Check Rail and Wing Rail Adjustments:


1. click the [ real > adjust check rails... ] menu item, or shortcuts SHIFT+CTRL-F9  or the FULL-STOP  (.) (period) key.

2. labels will appear on each rail end. Click the label (not the rail) to select the rail which you want to adjust. Each end of a check rail is adjusted separately.

tree_symbol.gif  the labels are:


MS1  MS2  MS3  TS1  TS2  TS3  MS4  DS4

3. use the buttons on the dialog to select the mouse actions, etc., for the selected rail.

If the [ retain on new ] mint box is ticked, any adjustments will be preserved when creating a new mint template. (Using the [ template > new template (quick set)... ] menu item, or [ NEW ] tool-button.)

If the [ retain on tools: make ] box is ticked, any adjustments will be preserved when creating a new template using the [ tools > make --- ] menu items. This is the same setting as the [ tools > make tools: options > retain adjusted check rails ] menu option.


check rail flare types:

The dialog has four flare choices: bent, machined, none, and reset.

[ bent ] The flare is formed by bending the end of the rail. Normal for bullhead rail (BH).

[ machined ] The rail is straight with a flare angle machined into the rail head. Nowadays most heavy flat-bottom rail (FB) in the UK uses machined flare angles on straight check and wing rails. This is mainly to allow for different lengths of flare angle (according to line speed) without the need for special baseplates.

Lighter FB rail, such as that used on industrial, narrow-gauge, and light railways normally has bent flare angles because it is much less expensive to make than a machined flare, and easier to repair on site.

[ none ] No flare on this rail end. This is mainly for use in building complex formations from partial templates.

[ reset ] Returns this rail end to the basic setting.

These functions are primarily for use on partial templates in complex formations. The basic prototype settings remain as set at [ real > V-crossing options > customize V-crossing > wing and check rails... ] menu item. The above adjustments modify these basic settings for each rail end individually.


Wing and check rail basic dimensions:

This diagram explains the wing rail and check rail (guard rail) terminology used in Templot. Everything is referenced from the centre of the "A" timber -- the one supporting the nose of the crossing vee:


The wing rails are the short lengths of running rail with bent extensions which lie alongside the nose of the crossing vee. The wing rail "reach" length is measured from the centre of the "A" timber (the timber bearing the nose of the vee) to the free end of the wing rail.

The check rails (guard rails) are the short lengths of rail fixed alongside the opposite running rail to prevent the wheels from taking the wrong path at the nose of the crossing. For dimensioning purposes the overall length of a check rail is divided into two component lengths, named "working length" and "extension length".

The check rail "working" length is measured from the position where it crosses the centre-line of the "A" timber, to the near end of the check rail (the end which is nearer to the switch) (point blades).

The check rail "extension" length is the remaining length from the "A" timber to the far end of the check rail.

Templot uses 2 sizes of wing rail reach length, 3 sizes of check rail working length and 2 sizes of check rail extension length, according to the V-crossing angle. These sizes are preset in increasing lengths, but can be set to be all the same, or to any desired lengths.

Here is a summary of the way these sizes are used according to the current V-crossing angle:

  V-crossing          check rail        check rail          wing rail
    angle:          working length:   extension length:   reach length:
  under 1:6              size 1           size 1             size 1
  1:6 to 1:10            size 2           size 1             size 1
  over 1:10 to 1:12      size 2           size 2             size 2
  over 1:12              size 3           size 2             size 2

When customizing the dimensions, be sure that you are changing the settings for the appropriate size according to the current V-crossing angle. Otherwise your changes will have no effect.

In the majority of cases, the check rail extension length is the same dimension as the wing rail reach length, so that the far end of the check rail is aligned with the end of the wing rail, but this can be changed as necessary by entering the appropriate dimensions.

Be aware that because the check rails are linked to the "A" timber, the position of the check rails will change when changing the style of timbering (equalized, square-on, or angled-on). But their position is not affected by any timber shoving which is applied to the "A" timber.


Continuous check rails

It is not possible for a plain track template to have check rails. However, a length of plain track with a continuous check rail on one side (for use on sharp curves), or both sides (for use in roadways and level crossings), can be created by modifying a turnout template.

First add some approach track ( F3  mouse action) of suitable length.

Then increase the MS1 or TS1 check rail working length sufficiently to extend the check rail(s) back into the approach track.

Then put the fixing peg at the toe joint ( CTRL-1 ) and click [ do > snap to peg ] menu item.

To create a full length of continuous check rail with flared ends at both ends, peg two such templates together at their CTRL-1  positions.

Or tick the [ retain on tools: make ] box and then click the [ tools > make mirror on peg ] menu item.

To swap a single check rail to the opposite side, click the [ template > invert handing ] menu item (or CTRL-X ).

Remember that despite appearances these are turnout templates, so to adjust their length use the F3  approach length mouse action (not F4 ).

More information: http://85a.co.uk/forum/view_topic.php?id=2580&forum_id=6


Wing & Check Rail clearance between tips to other passing rails, see:



link to this page: http://templot.com/companion/check_and_wing_rails.html