View source for HOn3½ gauge

{{Infobox model rail scale
| name = HOn3½ scale
| image_filename =
| image_caption =
| widthpx =
| scale = 3.5&nbsp;mm to {{cvt|1|ft|mm|0}}
| standard =
| ratio =1:87
| gauge ={{RailGauge|12mm}}
| prototype_gauge = {{RailGauge|3ft6in|lk=on}}
}}
'''HOn3{{frac|1|2}}''' gauge represents the modelling of {{RailGauge|3ft6in}} gauge railways in [[HO scale]], resulting in a model track gauge of {{RailGauge|12mm}} (the same as [[H0m]] and [[TT scale]]).  Trains are operated using [[direct current]] or [[Digital Command Control]] over realistic-looking two-rail track.
Railways that use the {{RailGauge|3ft6in|lk=on}} gauge can be found in [[New Zealand]], [[South Africa]], [[Indonesia]], [[Australia]], [[Taiwan]], [[Japan]] and others.
Manufacturers of Australian outline models in this size include Haskell Models, Wuiske Models, Black Diamond, PGC, Southern Rail and SDS Models. The main focus for Australian narrow gauge modelling has been the large [[Rail transport in Queensland|Queensland railway]] system. More recent releases have included Tasmanian and Western Australian prototypes. In New Zealand, the scale has a few niche manufactures.<ref name="nzmrg" />
CMD models and SARModel produce South African and Zimbabwean ([[Rhodesia Railways]]) HOn3{{frac|1|2}} models.
Most Japanese and Taiwanese HO scale models are made to run on 16.5mm gauge track and are made to 1:80 scale (Tomix, Kato and Tenshodo for Japan being the main brands and Haskell for Taiwan) but some small volume HOn3.5 kits and brass models are made for Japan with Imon being a major supplier.
== Related scales ==
In the same scale standard-gauge trains are modelled on {{RailGauge|16.5mm}} gauge track, known as [[HO scale]]. [[Sn3½]] is also used to represent {{RailGauge|3ft6in|lk=on}}, as the gauge is the same as HO scale. [[HOm]] uses the same 12mm gauge track to represent metre-gauge (3ft3.37in) railways. [[HOn3]] uses {{RailGauge|10.5mm}} gauge to represent {{RailGauge|3ft}} gauge railways [[H0e scale|H0e]]/HOn30 uses {{RailGauge|9mm}} gauge to represent railway with gauges of about {{convert|750|mm|ftin}}.<ref name="nzmrg">{{cite web|url=https://thejournal.nz/modelling-the-railways-of-new-zealand/|title=Modelling the railways of New Zealand|date=20 March 2013|accessdate=5 December 2024|publisher=[[New Zealand Model Railway Guild]]}}</ref> [[H0f gauge]] uses {{RailGauge|6.5mm}} to represent [[2 ft and 600 mm gauge railways]].
==See also==
* [[List of narrow-gauge model railway scales]]
* [[Rail transport modelling scales]]
* [[List of rail transport modelling scale standards]]
== References ==
{{reflist}}
{{H0 scale}}
{{DEFAULTSORT:HOn3-1 2 Scale}}
[[Category:Model railroad scales]]
[[Category:Narrow gauge railway modelling]]
{{Model-rail-stub}}