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RTR OO9 Locos and Rolling Stock: Compatibility (physically and prototypically)


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1. They are very rare, so no "generally" they did not use diamond crossings though no doubt there would be a few around. Bear in mind that NG companies tended to be short of cash so kept everything as simple as possible.

 

2. Sector plates - there are quite a few NG ones on mainland Europe but I am not sure of any over here. If you are a member of NGRM you'll find a couple of threads on NG sector plates.

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For a sector plate you could modify a Peco turntable, cutting off just past the pivot and utilising a segment of the well. Without the need to revolve 180 degrees it makes wiring a lot easier.

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One thing to be aware of when it comes to layout planning is that short wheelbase locomotives and crossings don’t always mix well.

 

To get from one side of a crossing to the other involves passing through two pairs of frogs - unlike traversing a point where there is just one single one.  If you are using Insulfrog or dead frog track pieces (eg: Peco N Gauge Setrack for 009), you could find the distance between the frogs is the same as the distance between the wheels of a small 0-4-0.  Given NG trains tend to run at slower speeds as well, this can lead to a locomotive becoming grounded and stopping.  Just a thought, Keith.

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On 18/07/2021 at 21:53, Hobby said:

1. They are very rare, so no "generally" they did not use diamond crossings though no doubt there would be a few around. Bear in mind that NG companies tended to be short of cash so kept everything as simple as possible.

 

2. Sector plates - there are quite a few NG ones on mainland Europe but I am not sure of any over here. If you are a member of NGRM you'll find a couple of threads on NG sector plates.


1. That’s what I was thinking and, as you say, keep it simple -  I can imagine such a crossing would be expensive and difficult to repair if it got abused.

 

2. Thanks for the information.

 

 

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On 18/07/2021 at 23:00, BernardTPM said:

For a sector plate you could modify a Peco turntable, cutting off just past the pivot and utilising a segment of the well. Without the need to revolve 180 degrees it makes wiring a lot easier.


That’s a good idea and would look suitably ‘crude’ (no criticism), more in keeping with narrow gauge (rather than standard gauge) operations.
 

 

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6 hours ago, Keith Addenbrooke said:

One thing to be aware of when it comes to layout planning is that short wheelbase locomotives and crossings don’t always mix well.

 

To get from one side of a crossing to the other involves passing through two pairs of frogs - unlike traversing a point where there is just one single one.  If you are using Insulfrog or dead frog track pieces (eg: Peco N Gauge Setrack for 009), you could find the distance between the frogs is the same as the distance between the wheels of a small 0-4-0.  Given NG trains tend to run at slower speeds as well, this can lead to a locomotive becoming grounded and stopping.  Just a thought, Keith.


Useful advice, I hadn’t considered that aspect, thanks.

 

 

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I would be very surprised if there weren't some diamond crossings on the narrow gauge, particularly in confined places like quarries, factories or harbours. What I would not expect to find would be double or single slips.

 

Of course diamond crossings between different gauges weren't unknown - the most familiar example being Cae Pawb on the Welsh Highland.

 

So I think if the only way you can get your plan to fit is to use a diamond crossing, the railway would probably have done the same thing,.

Edited by RJS1977
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On 18/07/2021 at 21:20, steveNCB7754 said:

 

a) Did any UK narrow gauge lines use such a Sector Plate? 

 

 

I don't think there were any on the narrow gauge in Great Britain, but there's nothing in principal that stops you having one on an imaginary line.

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On 18/07/2021 at 23:00, BernardTPM said:

For a sector plate you could modify a Peco turntable, cutting off just past the pivot and utilising a segment of the well. Without the need to revolve 180 degrees it makes wiring a lot easier.

There are a couple of rtr versions available, mostly German.

 

Faller and Noch certainly do them in H0, and I recall seeing TT, N and even Z ones on my searches which may be adaptable to local needs. 

 

Try a search for 'segment drehscheibe' 

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