If you are not already a member, or do not have his publication, could I recommend this - https://www.16mm.org.uk/publications/th ... modelling/ Supplied free to new 16 mm NGM members it's worth the joining fee on its own and covers a lot regarding relative scales/gauges/resulting sizes of model/prototype. And quite a few other things aside.FWLR wrote: ↑Sun May 16, 2021 6:23 am Thanks Rik, it is good to know that if members can get some more information on scales, helps them with their interest in our hobby.
There are people who come on to our site to explore and get some information because they are thinking of getting into 16mm garden railways. Maybe someone who has more knowledge than I can put a thread on the Help and Information page, so anyone can access it for help in choosing what could be what they are looking for...Just a thought...
In my experience the use of the term "Fn3" is usually used in conjunction with US prototypes. "15 mm" usually denotes we are in the IoM or Irish teritories, or possibly Southwold (another scale story here apparently). With "1:20.3" we might be edging into the land of "freelance". All 3 foot gauge and the same scale. So if one converts, and there are a few examples here, a bona fide Fn3 model of a 3 ft gauged geared loco to 32 mm gauge have we now created a new sub division - FM 32 Max
By the way, another example of how small a loco can actually be in relation to another, similarly correctly scaled, item that it pulled in real life. There are constant comments that the loco depicted here is under scale. It is not.