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topic: 2512Rationalised double slip
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posted: 18 Aug 2014 22:15

from:

Jim S-W
 
Solihull / Brierley Hill - United Kingdom

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Hi all

Part of my plan for my little side project is to model a rationalised double slip, where the straight on route from one direction is fixed. It's effectively a double slip converted back into a normal point.

Would something like this just have the switch at one end locked down or would some rails be removed. I've a vague memory of seeing a double slip with parts removed but can't remember where.

Also when where switched K crossings introduced?

Cheers

Jim
Last edited on 18 Aug 2014 23:32 by Jim S-W
posted: 19 Aug 2014 00:38

from:

Martin Wynne
 
West Of The Severn - United Kingdom

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Jim S-W wrote:
Part of my plan for my little side project is to model a rationalised double slip, where the straight on route from one direction is fixed. It's effectively a double slip converted back into a normal point.

Would something like this just have the switch at one end locked down or would some rails be removed. I've a vague memory of seeing a double slip with parts removed but can't remember where.
Hi Jim,

A lot will depend on the reason the connection was taken out of use, and how long ago.

If for example a loop is declared redundant and removed from a resignalling scheme, but the pointwork is physically in reasonable condition, the switches may be simply clipped out of use and disconnected from the rodding.

If the reason for taking the connection out of use is that it needs repair and it is not cost-effective to do it, the worn parts may be removed -- and replaced with plain rail where necessary.

In yards and sidings out-of-use connections are sometimes cannibalised for serviceable parts to be re-used elsewhere, and again if necessary replaced with plain rail.

One end of a slip is often left in position at the end of a loop or exit from sidings to act as trap points.

Also when where switched K crossings introduced?
Quite early, certainly back in pre-grouping days. There is a picture somewhere of a LSWR switch-diamond at Waterloo in the 1900s. There were several patent designs for improved K-crossings at that period.

regards,

Martin.

posted: 19 Aug 2014 08:17

from:

Jim S-W
 
Solihull / Brierley Hill - United Kingdom

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Thanks Martin.

The scenario is a disused line (taken out of use a few decades earlier) that crosses a small yard still in use. The actual slip is still at the location I'm very losely copying (I think) but its too far away to see properly

Cheers

Jim

posted: 19 Aug 2014 09:57

from:

Martin Wynne
 
West Of The Severn - United Kingdom

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Jim S-W wrote:
The actual slip is still at the location I'm very losely copying (I think) but its too far away to see properly
Hi Jim,

Google Earth?

Martin.

posted: 19 Aug 2014 10:27

from:

Jim S-W
 
Solihull / Brierley Hill - United Kingdom

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Hi Martin

Sadly there's a tree in the way!

Cheers

Jim

posted: 19 Aug 2014 18:40

from:

davelong
 
 

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Hi Jim does Bing maps birdseye view cover it with its 4 view points?

Dave



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