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topic: 3294Traversa at the end of a platform
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posted: 21 Jun 2018 08:38

from:

Hayfield
 
United Kingdom

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I am about to proceed to build a small 7 mm scale layout at home, will be a tiny branchline terminus to run my SR and GWR locos and stock, one space saving thought is rather than have a turnout close to the end as a run around, is to build a traversa. I see Noch (I think) does one in H0 scale which pivots at one end,
It would be simple to build, as in practice similar to a segment of a turntable (pivoting at the end rather than the middle). 

My question is was there a prototype in the UK of this type of arrangement, in the back of my mind the Isle of Wight comes to mind

posted: 21 Jun 2018 09:06

from:

John Palmer
 
 

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Bembridge had a sector plate, I think.

posted: 21 Jun 2018 10:28

from:

Martin Wynne
 
West Of The Severn - United Kingdom

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Hi John,

A turntable is more likely than a sector plate at a small station. If the loco is balanced on a turntable it can be turned by hand. Bembridge is the usual example, here's a picture:

 http://www.disused-stations.org.uk/b/bembridge/index18.shtml

The pit was boarded over, so easy to model. :)

Ramsgate also had a turntable, here's a picture:

 http://farm8.staticflickr.com/7184/6823103592_4842d17a45_z.jpg

Rothbury had a turntable at the end of the platforms, also leading back to an engine shed:

 http://www.disused-stations.org.uk/r/rothbury/

A sector plate (pivoted at one end) needs to be motorized because of the offset weight, so would be at larger stations. There was one at Birmingham Snow Hill. Here's a picture of that:

 http://www.warwickshirerailways.com/gwr/gwrbsh1679.htm

A traverser (parallel tracks moving sideways) also needs to be motorized. The most well-known example was at Birmingham Moor Street, where you can still see the gap under the platforms where it used to fit. Here's a picture:

 http://www.warwickshirerailways.com/gwr/gwrms1223.htm

Here's a map of the Bembridge turntable:

 http://maps.nls.uk/view/105990754#zoom=5&lat=10376&lon=2700&layers=BT

Here's a map of Rothbury (the OS surveyor seems to think there were 2 tracks on the table! I think it must be a drawing of the deck rather than the rails. :? ):

 http://maps.nls.uk/view/132277886#zoom=5&lat=3950&lon=14567&layers=BT

cheers,

Martin.

posted: 21 Jun 2018 11:04

from:

Martin Wynne
 
West Of The Severn - United Kingdom

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p.s. John,

There is a topic about this on RMweb, with more examples:

 http://www.rmweb.co.uk/community/index.php?/topic/133760-turntables-used-for-loco-release-at-termini/

Martin.

posted: 21 Jun 2018 16:29

from:

John Palmer
 
 

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Perhaps worth noting that at Rothbury the turntable could accommodate a tender engine and that the Rothbury Branch was long enough to make a turning facility highly desirable.

Moreover, Scotsgap (the junction for the Rothbury line) was also equipped with a turntable, so that there was no difficulty in arranging for 'chimney first' working, whatever the origin of the train concerned.

Contrast this with the Bembridge branch. So far as I am aware, there was no turntable at Brading, the junction for the branch, so turning an engine at Bembridge for a 'chimney first' departure would likely mean that its return working to the terminus would have to be 'bunker first'.

Since Bembridge appears to have been a 'tank engine only' line there would seem to have been little purpose in providing full turning facilities, so, assuming the table actually had a full rotational capability, my guess is that it was only ever used as a sector plate for engine release.  In any case, clearance for full turning of an engine looks very limited.

posted: 21 Jun 2018 16:53

from:

pointo1d
 
United Kingdom

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Possibly at tad too North, but IIRC, there was a sector plate of sorts @ Holmfirth.

HTH,

Dave P

posted: 21 Jun 2018 17:28

from:

Hayfield
 
United Kingdom

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Thanks for all the replies, not only quick but extremely helpful,

I think my own take on Bembridge looks about what I was looking for, track plan is about what I was thinking about, and have some old buildings from my previous club when they moved club house.

Just need to get my head around downloading the map on to a track pad

Thanks again most helpful and far better than my first thoughts as I like the common crossing at the end of the turntable



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