Editing 2 mm scale (section)

==Standard==
The 2&nbsp;mm standards<ref name=2mmstandard /> were proposed by Mr. H H Groves in the early 1960s and revised to their current specification in November 1963 by Geoffrey Jones.<ref name=2mmstandardadoption /> It is similar in size to the slightly larger British [[N scale]] at 1:148, and the slightly smaller European/American N scale at 1:160; though it predates both.<ref>{{Cite web |title=Standards |url=https://2mm.org.uk/standards.htm |access-date=2024-05-11 |website=2mm.org.uk}}</ref>

Since 2&nbsp;mm scale is very close to the 1:148 British N scale, a hybrid specification can be modelled by re-wheeling proprietary British N-scale models to the 9.42&nbsp;mm track gauge.  This hybrid specification results in a track gauge equivalent to {{convert|4|ft|6+7/8|in|mm}}, slightly narrower than the prototype 4 feet {{frac|8|1|2}} inches.  There is an advantage however in the narrower gauge as this allows more room for the outside motion of outside cylindered steam locomotives, which must be overscale in order to function correctly.  This approach is often recommended for beginners.  However, 2&nbsp;mm-scale and hybrid-scale models do not usually sit well together due to the larger size of the latter.{{citation needed|date=May 2021}}

=== Supplementary Standards ===
Like [[Protofour]], 2&nbsp;mm standards have been extended to several other prototypes of both wider and narrower gauge with the same tolerances such as [[Brunel gauge|Brunel's]] {{RailGauge|7ft0.25in}} gauge,<ref>{{cite web |title=BGS standards |url=http://www.broadgauge.org.uk/modelling/models_standards.html |publisher=Broad Gauge Society |access-date=2021-05-11}}</ref> Japan Rail's {{RailGauge|1067mm}} narrow gauge and so on.

==== FiNescale Standard ====

The FiNescale standard in use for European prototypes is identical to 2mmFS, with the exception of a to-scale rail gauge of {{RailGauge|9mm}}.{{citation needed|date=May 2021}}

=== Appreciation===
One major effect of the standard is to improve the appearance of the track as opposed to N scale, where it is overly tall.<ref name=WoR/>  Linking carriages with three link chains has been successfully achieved in using the standard.<ref name=Dent2016/>