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topic: 1228Installing diamonds and slips where one road is curved throughout the crossing
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posted: 2 Sep 2010 23:09

from:

TonyHagon
 
Near Wick, Caithness - United Kingdom

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Hello trackfriends
My next project is a two track main line, and includes a trailing siding which is transition curved throughout. I need to install a slow  line parallel to the main line which is single slipped to the curved siding. I don't know how to install a half diamond to include the curved element of the turnout side. Any help gratefully received.. the image below shows how far I've got so far (ignore sleeper spacings, I have only used plain track to work out where the curves etc will go..)

Best regards
Tony Hagon

(p.s. this project has been in inception since 1980!)1876_021808_160000000.png1876_021808_160000000.png

posted: 3 Sep 2010 00:00

from:

Brian Nicholls
 
Poole - United Kingdom

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TonyHagon wrote:
Hello trackfriends
My next project is a two track main line, and includes a trailing siding which is transition curved throughout. I need to install a slow  line parallel to the main line which is single slipped to the curved siding. I don't know how to install a half diamond to include the curved element of the turnout side. Any help gratefully received.. the image below shows how far I've got so far (ignore sleeper spacings, I have only used plain track to work out where the curves etc will go..)


Hi Tony,

You’re a man  cut from the same cloth as I.

I too used plain track templates to sort out where crossing should be in my formation.

I have done exactly what you are looking for, see my posting from yesterday;

topic 1227

Take a look at my Diamond crossing with curved track crossing at both sides.

The way I did this was to first plant the diamond crossing templates, them blank them as far as I needed to meet the curves. This will give you a slight straight bit at the middle of the diamond, but you can make this as small as you like, bearing in mind you need to have the actual obtuse crossing parts of the diamond template.

Then you will need to use partial templates to make up the curved part.

The tricky bit I found was getting the check rails in the right place and the flange gap correct, but if you take the time you should be able to succeed. Have ago anyway.

If you need any further info, don’t hesitate to message me.

However, I may not be able to reply until tomorrow afternoon as I am about to sign off, have a heavy day tomorrow.

Best regards.

Brian Nicholls.

posted: 3 Sep 2010 09:12

from:

richard_t
 
Nr. Spalding, South Holland - United Kingdom

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Does this help: topic 1113

posted: 3 Sep 2010 13:15

from:

Brian Nicholls
 
Poole - United Kingdom

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richard_t wrote:
Does this help: topic 1113


Hi Richard,

Wish I had spotted that sooner, might have saved me much head scratching ! :D

Best regards.

Brian Nicholls.

posted: 3 Sep 2010 16:40

from:

TonyHagon
 
Near Wick, Caithness - United Kingdom

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Brian
Many thanks for the prompt reply. I'll have a go at this at the weekend as it is an extremely good and powerful excuse not to decorate the hall... after all, we have to get our priorities right!

Regards
Tony

posted: 4 Sep 2010 16:39

from:

Brian Nicholls
 
Poole - United Kingdom

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TonyHagon wrote:
 I'll have a go at this at the weekend as it is an extremely good and powerful excuse not to decorate the hall... after all, we have to get our priorities right!


Hi Tony,

Just thought I would give you a few hints as to how I did my “Irregular Diamond crossing”. I should have put these notes into my original reply to you but time did not allow.

When I did the Vee’s either side o f the diamond K crossing I used turnouts.

First select a turnout such as a B6 (it does not matter at this stage what crossing angle you call up, but if you do know, roughly speaking, the angle choose the nearest it will save a little time).

Then from this point on, use only the MAIN ROAD side of the turnout (forget the TS side).

Now shorten and/or blank off the turnout MS side up to just before the ends of the check rails (obviously you will need these).

Now align the Fine Point FP as near as you can to the crossing point of the curved rails you want to match.

Now put the PEG onto the FP using  GEOMETRY  >  Peg positions ..>  Peg on FP

Then (using only the MS side of the turnout) rotate the back end (nearest the centre of the diamond) of the MS stock rail until it just aligns with the curved rail you want to match.

Now put the PEG onto the MS Length using  GEOMETRY  >  Peg positions ..>  Peg on length

Next start to gently manipulate and curve the other end of the MS stock rail using  F6 (Curve), F10 (Swell Curve) and F8 (Rotate Around Peg),  until you fully align the MS stock rail to the required curved rail

Please note, doing the above you will have to keep checking that the Fine Point of the turnout Vee stays on the FP of the curved rails crossing point. You may need to move the Vee FP very slightly back onto the fine point using F7 (Shift Position), and then repeating the above until you have accurately aligned the MS stock rail over the curved pattern rail.

Having done this, check that the Vee rail part, associated with only the MS side is also correctly aligned to the curved rail pattern on that side.

If all is OK, then, you can now start to adjust the TS rail side of the Vee, but first you MUST put the PEG onto the FP point, as described above.

The best way to correct the TS rail of the Vee, is to type in the angle numbers, as you have finer control of adjustment. It is worth bearing in mind that the angle can be adjusted to two (2) decimal places of accuracy i.e. 1: 6.34.

So type in the angle numbers until the TS rail of the Vee correctly aligns with the curved pattern rail.

When this is done, you have completed one half of the Vee crossing, but first you must delete the unwanted (and not aligned TS rails of the turnout).

To accomplish this use  DO  >  Omit rails and joint marks  and when the pop-up box appears, UN-TICK the TS side boxes (remember to leave all the MS side and the Vee).

Next you need to do the other side of the Vee crossing, this is basically a repeat of the above procedure.

Before you start the other side, ensure that the PEG is on the FP for the current template, if so, then Store and Background  the first half.

Next COPY the first half to control, then swap hand by using  Template  >  Swap Hand 

This will give you a swivelled Vee template.

Now, rotate the template (F8) until it closely aligns with the other curved rail pattern.

Next follow the above procedure (for the original MS side) to correctly align this side of the Vee crossing.

When completed successfully, you need to delete (omit) the unwanted rails.

Again you need to UN-TICK all the TS rail items and in this case also the Vee.

You have now completed a Vee crossing on one side of the diamond.

In addition you may find that you can also extend the curved MS stock rails on both sides, using F4 in each case, to following exactly the curved pattern rail up to the diamond K crossing.

If this is not the case, then you will have to use a curved plain track fill-in rail at each side.

Just repeat all the above for the other side.

Hope this all helps.

BTW, hope the mistress of the house does not complain too much about not doing the decorating !! :D

Best regards.

Brian Nicholls.



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