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  • The Plug Track functions are experimental and still being developed. Some of the earlier pages of this topic are now out-of-date.

    For an updated overview of this project see this topic.   For some practical modelling aspects of using Plug Track see Building 3D Track.

    The assumption is that you have your own machines on which to experiment, or helpful friends with machines. Please do not send Templot files to commercial laser cutting or 3D printing firms while this project is still experimental, because the results are unpredictable and possibly wasteful.

    Some pages of this and other topics include contributions from members who are creating and posting their own CAD designs for 3D printing and laser-cutting. Do not confuse them with Templot's own exported CAD files. All files derived from Templot are © Martin Wynne.
  • The Plug Track functions are experimental and still being developed.

    For an updated overview of this project see this topic.   For some practical modelling aspects of using Plug Track see Building 3D Track.

    The assumption is that you have your own machines on which to experiment, or helpful friends with machines. Please do not send Templot files to commercial laser cutting or 3D printing firms while this project is still experimental, because the results are unpredictable and possibly wasteful.

    Some pages of this and other topics include contributions from members who are creating and posting their own CAD designs for 3D printing and laser-cutting. Do not confuse them with Templot's own exported CAD files. All files derived from Templot are © Martin Wynne.

Prototype track components explained.

Quick reply >
I believe I might have sorted the half-diamond drive point calculation:-
1732447513927.png


However I suspect that for a model half-diamond with movable K-crossings there is no point having more than one switch drive motor.
Servos with their programmable movement dimension might be ok.

Steve
 
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I believe I might have sorted the half-diamond drive point calculation:-
@Steve_Cornford

Hi Steve,

Why have you moved the first switch drive from K1/K2 to K2/K3? It's not prototypical or desirable -- it's important that the tip of the switch blade is held firm against the stock rail.

cheers,

Martin.
 
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Hi Phil,
Any thoughts on how the prototype would go about making the arrangement captured in the photo? The photo is a screen shot from a video about signal engineers, and these are the opening images. Its the offset scissors running right though side the loco direction road that caught my attention. I have never seen anything quite like it, would be a pig to chairs by the looks of it. any ideas?
cheers
Phil

unusal offest siccors.png
 
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Hi Martin and Phil,
More prototype questions if you don't mind. Would either of you know by any chance, if the permanent way side railways adapted the change from the old BS190 standards for bolt sizes to the newer BS1083 standards? And if they did adapt the new standard, any likely dates for the change?

I believe the reason for the change in Bs standards was to save on material and the new BS1083 was introduced in 1924, so It could well have been as part of the 1926 REA standards.
That is assuming they did adapt the new BS standard. (not a given for the railways), As I believe they did not adapt the change for boilers
The next question is the obvious one what did the GWR do?
cheers
Phil,
 
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The next question is the obvious one what did the GWR do?
@Phil G

Hi Phil,

The railways tended to design and make their own bolts. And much else, even down to shelf brackets and door handles. :)

For the GWR, the p.w. bolt drawings are on the S4Soc site here:

https://www.scalefour.org/downloads/gwrtracknotes/R1730.pdf
https://www.scalefour.org/downloads/gwrtracknotes/R1731.pdf
https://www.scalefour.org/downloads/gwrtracknotes/R1732.pdf
https://www.scalefour.org/downloads/gwrtracknotes/R1733.pdf
https://www.scalefour.org/downloads/gwrtracknotes/R3796.pdf

I also have paper copies of these, which I could scan if the above aren't very clear.

cheers,

Martin.
 
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