Sn3½
In rail transport modelling, Sn3½ is a scale/gauge combination derived from S scale to represent narrow gauge track by using gauge track. The scale is 1:64.
Sn3½ is popular in South Africa, Australia and New Zealand.
Sn3½ is very rarely or never used for modelling in other countries with 3 foot 6 gauge railways such as in Japan, Taiwan, and Indonesia
Track
As track scales down to 16.5 mm at 1:64, modelers use HO gauge track on Sn3½ layouts.New Zealand
Sn3½ is the primary scale for modeling New Zealand's narrow gauge 3 ft 6 in railways. The majority of rolling stock available, are white-metal kits, making them considerably more expensive and heavier than other scales and countries. Many of these kits are highly detailed. Buildings are generally hand-made, and track can either be purchased or hand laid with sleepers and rail. Alternatives for modeling New Zealand railways is 1:120 or TT scale, known as NZ120, as it is a cheaper option. HOn3½ gauge, HO scale with 12mm gauge, is also increasing in popularity.New Zealand Sn3½ suppliers and manufacturers
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Sm