Scale ⁄16 in to 1 ft Model gauge 16.5 mm (0.65 in) | Scale ratio 1:64 Prototype gauge 3 ft 6 in (1,067 mm) | |
In rail transport modelling, Sn3½ is a scale/gauge combination derived from S scale to represent narrow gauge 3 ft 6 in (1,067 mm) track by using 16.5 mm (0.65 in) gauge track (the same as HO gauge). The scale is 1:64.
Contents
Sn3½ is popular in South Africa, Australia (particularly Western Australia, Queensland and Tasmania where narrow gauge systems exist) and New Zealand.
Track
As 3 ft 6 in (1,067 mm) track scales down to 16.5mm at 1:64, modelers use HO gauge track (which represents Standard gauge at 1:87 scale) on Sn3½ layouts.
Sm
Sm gauge is also defined by the German NEM 10 standard, representing Continental European metre gauge.
References
Sn3½ Wikipedia(Text) CC BY-SA