View source for 2 gauge

{{Short description|Model railroad gauge}}
{{For|the firearm size|2 bore}}
{{more citations needed|date=September 2014}}
{{Infobox model rail scale
| name =2 gauge
| image_filename =
| image_caption =
| widthpx =
| scale =
| standard =
| ratio =ca. 1:22.5
| gauge ={{RailGauge|64mm}}<br/>later: {{RailGauge|2in}}
| prototype_gauge ={{RailGauge|sg|allk=on}}
}}
[[File:Kleine Sächsische Schweiz, Zug.jpg|thumb|IIm gauge LGB Train.]]
'''Gauge 2''' (also called '''2 gauge''' or '''II gauge''') is a [[model railway]] [[Rail gauge|gauge]], originally {{RailGauge|64mm}},<ref name="NEM010">{{cite web|url=http://www.miba.de/morop/nem010_d.pdf|publisher=[[Normen Europäischer Modellbahnen|NEM]]|title=Normen Europäischer Modellbahnen Maßstäbe, Nenngrößen, Spurweiten|language=German|date=2011|accessdate=2014-05-15|archive-date=2016-03-03|archive-url=https://web.archive.org/web/20160303174618/http://www.miba.de/morop/nem010_d.pdf|url-status=dead}}</ref> then standardised in 1909 at {{RailGauge|2in|first=imp}}, a 20% reduction and a change in definition: from mm to inch.{{citation needed|date=February 2016}} It has since fallen into disuse. The gauge was introduced by [[Märklin]] at the [[Leipzig]] [[:de:Leipziger_Messe#modell-hobby-spiel|toy fair]] in 1891. Gauge 2 was equivalent to a 1:22.5 scale.
==Related scales and gauges==
After the change to {{RailGauge|2in}} in 1909, {{RailGauge|64mm}} gauge was standardised as [[3 gauge]] (or ''III gauge'').
European [[G gauge]] trains are built to the same II gauge scale, but with a narrow rail gauge of {{RailGauge|45mm}} (the same as [[1 gauge]]). This G gauge at 1:22.5 scale represents {{RailGauge|1000mm|allk=on}} [[narrow-gauge railway]]s. This scale-gauge combination is sometimes called '''IIm''' in European literature.
In the [[United Kingdom|UK]], Gauge 2 was 2 inches (50.8 mm) while Gauge 3 was {{RailGauge|2.5in}}. From this, it follows that [[G gauge]] is sometimes, albeit rarely, referred to as 3m. A 2 inch (50.8 mm) gauge of standard gauge locos gives a scale of 1:28.25, not so far off the 1/29 used by some manufactures with {{RailGauge|45mm}} gauge track. In the grand tradition of model rail gauges often being narrower than the full scale equivalent ([[00 scale]] being the classic example) this is deemed perfectly acceptable.
==See also==
*[[16 mm scale]]
*[[Rail transport modelling scales]]
==External links==
{{Wiktionary}}
{{Commons category}}
* [https://www.16mm.org.uk/ Association of 16mm Narrow Gauge Modellers]
==References==
{{refbegin}}
* [[Model Railways and Locomotives Magazine]] Vol. 1 No 8 August 1909
{{refend}}
{{reflist}}
{{DEFAULTSORT:2 Gauge}}
[[Category:Model railroad scales]]
{{Model-rail-stub}}