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What does inch scale mean?

Updated: Jun 18, 2019

This question is often asked by interested members of public, therefore it is no doubt that this may also be a question that some newcomers to the hobby would like to understand a little better.

Equally as confusing, is the number of different ways that the scale of a miniature steam engine can be referred to.  

When referring to an engine as “half size” the terminology is quite self-explanatory but often the term 6” (inch) will be used instead. This is a reference to the scale factor of 6” to the Foot.  So, any part on the full size which is a foot (12”) long would be 6” long on the miniature.

Common references and their inch scale:

The picture below, taken from shows a line up of Little Samson Steam Tractors all built to the same design but of different scales 3”, 4” and 6”.

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