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{{Infobox model rail scale
{{Infobox_Model_Rail_Scale
| name = 3mm finescale
| name = 3 mm finescale
| image_filename =
| image_filename =
| image_caption =
| image_caption =
| widthpx =
| widthpx =
| scale = 3mm to 1ft
| scale = 3 mm to {{cvt|1|ft|mm|0}}
| ratio = 1:101
| ratio = 1:101.6
| gauge = 13.5mm, 14.2mm
| gauge =
{{RailGauge|9mm}} <small>(3'&nbsp;gauge)</small><br/>{{RailGauge|13.5mm}} <small>(Scotch)</small><br>{{RailGauge|14.2mm}} <small>(standard)</small><br>{{RailGauge|15.75mm}} <small>(Irish)</small><br>{{RailGauge|16.5mm|first=met}} <small>(Indian)</small><br>{{RailGauge|21 mm|first=met}} <small>(Brunel)</small><ref>{{cite web|url=http://www.ncb.ndo.co.uk/rail/3mm/Getting_started/#A2|title=Getting Started in 3mm: FAQ|author=Nigel Brown|publisher=The Three Millimetre Society|access-date=2013-07-11}}</ref>
| prototype_gauge = [[Standard gauge]]
| prototype_gauge =
{{RailGauge|3ft}}<br>{{RailGauge|54in|first=met}} <small>(Scotch&nbsp;gauge)</small><br>{{RailGauge|sg}} <small>(standard)</small><br>{{RailGauge|Irish}} <small>(Irish&nbsp;gauge)</small><br>{{RailGauge|66in|first=met}} <small>(Indian broad gauge)</small><br>{{RailGauge|brunel|first=met}} <small>([[Brunel&nbsp;gauge]])</small>
| website=http://www.3mmsociety.org.uk/
}}
}}
{{Infobox model rail scale
{{Infobox_Model_Rail_Scale
| name = British TT gauge
| name = British TT gauge
| scale = [[3mm scale|3mm to 1ft]]
| scale = 3 mm to {{cvt|1|ft|mm|0}}
| ratio = 1:148
| ratio = 1:101
| gauge = [[TT gauge|12mm]]
| gauge = {{RailGauge|12mm}} [[TT gauge]]
| prototype_gauge = [[Standard gauge]]
| prototype_gauge = [[Standard gauge]]
}}
}}


'''3mm scale''', also known as '''3mm finescale''', is a model railway scale of 3mm:1ft used for British prototypes. Introduced as British [[TT gauge]], it sits approximately halfway between British [[N gauge]] and [[OO gauge]], but is not as popular as either and there is no longer any mass manufacturer [[ready-to-run]] support. When [[TT gauge]] model railways were developed for British prototypes, in order to fit the small British prototypes, the scale was enlarged but without altering the [[TT gauge|12mm gauge]]. The result, [[British TT gauge]], is too narrow. This lead to the development of {{RailGauge|14.2mm}} gauge [[3mm finescale]]. Thus two [[finescale]] standards were developed. By far the more common of these is 14.2mm gauge track, which is accurate. Some modellers choose to use slightly narrower 13.5mm track due to the necessary oversize motion of [[outside-cylinder]]ed steam locomotives.
'''3&nbsp;mm scale''', also known as '''3&nbsp;mm finescale''', is a model railway scale of 3&nbsp;mm : {{cvt|1|ft|mm|0}} used for British prototypes. Introduced as British [[TT gauge]], it sits approximately halfway between British [[N gauge]] and [[OO gauge]] but is not as popular as either and there is no longer any mass manufacturer ready-to-run support. When [[TT gauge]] model railways were developed for British prototypes, in order to fit the small British prototypes, the scale was enlarged but without altering the [[TT gauge|12mm gauge]]. The result, [[British TT gauge]], is too narrow. This led to the development of {{RailGauge|14.2mm}} gauge 3mm finescale. Thus two [[finescale]] standards were developed. By far the more common of these is 14.2&nbsp;mm gauge track, which is accurate. Some modellers choose to use slightly narrower 13.5&nbsp;mm track due to the necessary oversize motion of outside-[[Cylinder (locomotive)|cylinder]]ed steam locomotives.


'''British TT''', also known as '''TT3''', was pioneered by Triang Railways as ready-to-run models.
'''British TT''', also known as '''TT3''', was pioneered by Triang Railways as ready-to-run models.


Other gauges are also used to model other prototypes ([[Irish gauge|Irish broad gauge]], Brunel broad gauge, {{RailGauge|84|disp=s}}). For narrow gauges, [[N gauge]] 9&nbsp;mm track represents {{RailGauge|3ft}} gauge; [[Z gauge]] {{RailGauge|6.5mm}} track represents to {{RailGauge|2ft2in}} gauge
Other gauges are also used to model other prototypes ([[Irish gauge|Irish broad gauge]], [[Brunel gauge]]). For narrow gauges, [[N gauge]] 9&nbsp;mm track represents {{RailGauge|3ft}} gauge; [[Z gauge]] {{RailGauge|6.5mm}} track represents to {{RailGauge|2ft2in}} gauge.


The 3mm Society caters for all modellers of 3mm scale.
The ''3mm Society'' caters for all modellers of 3&nbsp;mm scale.


==See also==
==See also==
* [[Rail transport modelling scales]]
* [[Rail transport modelling scales]]
* [[Model railway scales]]
* [[Model railway scales]]

==References==
<references/>


== External links ==
== External links ==
* [http://www.3mmsociety.org.uk/ 3mm Society]
* [http://www.3mmsociety.org.uk/ 3mm Society]
* [http://www.3smr.co.uk/ 3mm Supplier]


[[Category:Model rail stubs]]
[[Category:3 mm scale| ]]
[[Category:3mm scale]]

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{{model-rail-stub}}

Latest revision as of 05:22, 23 July 2023

3 mm finescale
Scale3 mm to 1 ft (305 mm)
Scale ratio1:101.6
Model gauge9 mm (0.354 in) (3' gauge)
13.5 mm (0.531 in) (Scotch)
14.2 mm (0.559 in) (standard)
15.75 mm (0.620 in) (Irish)
16.5 mm (0.65 in) (Indian)
21 mm (0.827 in) (Brunel)[1]
Prototype gauge3 ft (914 mm)
1,372 mm (4 ft 6 in) (Scotch gauge)
1,435 mm (4 ft 8+1⁄2 in) (standard)
5 ft 3 in (1,600 mm) (Irish gauge)
1,676 mm (5 ft 6 in) (Indian broad gauge)
2,134 mm (7 ft) (Brunel gauge)
Websitehttp://www.3mmsociety.org.uk/
British TT gauge
Scale3 mm to 1 ft (305 mm)
Scale ratio1:101
Model gauge12 mm (0.472 in) TT gauge
Prototype gaugeStandard gauge

3 mm scale, also known as 3 mm finescale, is a model railway scale of 3 mm : 1 ft (305 mm) used for British prototypes. Introduced as British TT gauge, it sits approximately halfway between British N gauge and OO gauge but is not as popular as either and there is no longer any mass manufacturer ready-to-run support. When TT gauge model railways were developed for British prototypes, in order to fit the small British prototypes, the scale was enlarged but without altering the 12mm gauge. The result, British TT gauge, is too narrow. This led to the development of 14.2 mm (0.559 in) gauge 3mm finescale. Thus two finescale standards were developed. By far the more common of these is 14.2 mm gauge track, which is accurate. Some modellers choose to use slightly narrower 13.5 mm track due to the necessary oversize motion of outside-cylindered steam locomotives.

British TT, also known as TT3, was pioneered by Triang Railways as ready-to-run models.

Other gauges are also used to model other prototypes (Irish broad gauge, Brunel gauge). For narrow gauges, N gauge 9 mm track represents 3 ft (914 mm) gauge; Z gauge 6.5 mm (0.256 in) track represents to 2 ft 2 in (660 mm) gauge.

The 3mm Society caters for all modellers of 3 mm scale.

See also

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References

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  1. ^ Nigel Brown. "Getting Started in 3mm: FAQ". The Three Millimetre Society. Retrieved 2013-07-11.
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