Templot Club Archive 2007-2020                             

topic: 3674Switch diamonds
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posted: 21 May 2020 18:49

from:

ikcdab
 
Taunton - United Kingdom

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Recently found this pic online.Outside of the switch rails there are fixed rails which the switch rails seem to butt against when closed. There is a better picture on  pafe page 22 of iain rices 4mm finescale track book which says its old oak common.
What are these fixed rails for?
1588_211343_540000000.jpg1588_211343_540000000.jpg

posted: 21 May 2020 22:21

from:

Nigel Brown
 
 

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Presumably they stop the switch rails from spreading. Maybe using slide chairs wouldn't be as effective in this instance?

posted: 21 May 2020 22:41

from:

ikcdab
 
Taunton - United Kingdom

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that looks possible, though i dont see why ordinary slide chairs couldnt have been used?

posted: 21 May 2020 22:59

from:

Martin Wynne
 
West Of The Severn - United Kingdom

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Hi Ian,

Those backing rails to support the closed switch blades are standard practice on GWR switch-diamonds.

Full details in David Smith's GWR track book, which I can't put my hands on just at the moment. :?

I think there was also some discussion about this in Andrew's Yeovil layout topic.

Other companies tended to use more conventional spacer blocks and block chairs.

I will write some more when I have actually found the details.

cheers,

Martin.

posted: 21 May 2020 23:19

from:

Rob Manchester
 
Manchester - United Kingdom

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Martin Wynne wrote:
Hi Ian,

Those backing rails to support the closed switch blades are standard practice on GWR switch-diamonds.

Full details in David Smith's GWR track book, which I can't put my hands on just at the moment. :?

I think there was also some discussion about this in Andrew's Yeovil layout topic.

Other companies tended to use more conventional spacer blocks and block chairs.

I will write some more when I have actually found the details.

cheers,

Martin.
Hi Martin,

Page 55 in Smith's. I will let you do the explaining :) I am off for an early night after a flooded bathroom incident today.

Rob




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