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topic: 2412Irish 3foot in 7mm
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posted: 23 Feb 2014 09:04

from:

Phil O
 
Plymouth - United Kingdom

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Hi All

Can anyone please help with track standards for Irish 3 foot gauge using 7mm scale, 21 mm track gauge and Slaters wheels. Will using one of the already extant 7mm gauges reduced from 32mm work?

Thanks in advance for any enlightenment.

Phil

Last edited on 23 Feb 2014 10:03 by Phil O
posted: 23 Feb 2014 09:22

from:

Martin Wynne
 
West Of The Severn - United Kingdom

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Phil O wrote:
Can anyone please help with track standards for Irish 3 foot gauge using 7mm scale, 21 mm track gauge and Slaters wheels. Will using one of the already extant 7mm gauges reduced from 32mm work?
Hi Phil,

The answer is yes. For sharp narrow-gauge curves I would suggest starting from 0-MF 31.5mm rather than 0-SF 31.2mm.

So that means reducing everything by the difference (31.5 - 21) = 10.5mm reduction.

So back-to-back for Slaters wheels is 29.2 - 10.5 = 18.7mm.
For other wheels 29.0 - 10.5 = 18.5mm.

Track gauge 21mm.

Flangeways 1.5mm as 0-MF.

Check gauge (30 - 10.5) = 19.5mm.

The alternative would be to use S7 wheels and the corresponding reduction. The ScaleSeven Group may already have members modelling 3ft gauge and recommended standards for sharp narrow-gauge curves:

 http://www.scaleseven.org.uk

regards,

Martin.

posted: 23 Feb 2014 10:10

from:

Phil O
 
Plymouth - United Kingdom

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Hi Martin

Many thanks for the reply, my bad typing has been duly edited, me brain works quicker than me finger.

I was hoping that I could use an extant set of standards, rather than have to concoct my own. The Slaters wheels are already in stock, hence the reference.

Thanks Phil

posted: 23 Feb 2014 10:40

from:

Martin Wynne
 
West Of The Severn - United Kingdom

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Phil O wrote:
I was hoping that I could use an extant set of standards, rather than have to concoct my own.
Hi Phil,

You could try asking on the 7mm email group. It's an active group:

 http://uk.groups.yahoo.com/neo/groups/7mm/info

There is also an email group for Irish narrow-gauge (all scales and prototype):

 http://groups.yahoo.com/neo/groups/irish_three_foot/info

Unless you want interchange running with an existing modeller, I would suggest concocting your own from current practice is the best approach. Existing standards are likely to vary, and be based on older wheels. Some may be using 4mm wheels.

regards,

Martin.

posted: 23 Feb 2014 12:50

from:

Phil O
 
Plymouth - United Kingdom

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Hi Martin

This is a stand alone project on behalf of one of one of our club members.

To date there are several of the rail motors, several coaches and wagons under construction and all are or will be running on Slaters 3 foot narrow gauge wheels, hence the original query.

I have now nearly finished Temploting Castlefin, I will be having a look at the Irish OS mapping to see what other possibilities there are.

Cheers Phil
Last edited on 24 Feb 2014 09:43 by Phil O


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