The space between the lines
Pondering on what scale, exactly, to build the model railway
A week or so ago, I wrote about the train set I’d recently bought, as the nucleus of a model railway inspired by the Brecon & Merthyr line in South Wales. The train set is N Gauge, or N Scale. Is this, though, the best scale for me to build it in?
The term “gauge” means the distance between the inside edges of the rails, just as it does on a normal train. Model trains come in a huge variety of scales and gauges, ranging from those large enough to sit on, to those barely large enough to see. N Gauge was created by the Bavarian toy company K. Arnold in the early 1960s, and is named for the fact its gauge is nine millimetres—or neun Millimeter, I suppose. If I put a piece of the track that came with the train set next to a ruler, you can get a rough idea of its size.

Because it’s so small, you can fit more train into a tight space; that’s always been one of the reasons I’ve struggled to build myself a model railway.
Lots of trains are made in N Gauge, off the shelf; and train sets, like the one I bought, to give you an easy start. However, it’s not the only gauge or scale that’s roughly this sort of size. The other one, in fact, is even older.
N Gauge’s scale, for British models, is 1 to 148; or a fraction over 2mm of model to every real-world foot. However, since the 1930s, modellers had already been handbuilding models to exactly 2mm to the foot. It’s an extremely similar scale, roughly 1 to 152. Given the trains are so small to begin with, the difference is barely even visible. One pioneering 2mm Scale model railway built in the 1940s, the Inversnecky & Drambuie Railway, has survived and is partially on display in the National Railway Museum in York.
Unlike N Gauge, you can’t buy any trains or train sets in 2mm Scale. There is, however, a 2mm Scale Association who produce various different products to help modellers build their own 2mm Scale trains. A while ago now, I bought one of their “starter packs”, which includes a short length of track, which you assemble yourself from rails and a plastic base. It’s much more fragile than train set track, so I glued it down to a piece of foamboard and tried to make it look ballasted.

The track gauge isn’t 9mm, though; it’s 9.42mm instead. Very very close, but not close enough to run the same trains reliably. You can see it has much thinner rails; that’s because it tries to be an exact scale model of real track. For most of the twentieth century, most British railway line was made of individual 60-foot panels; so this piece of track is 12cm long as a result. 9.42mm is the exact width of real track, scaled down to 2mm scale; N Gauge, on the other hand, if you scaled it up to real life, would be about 10cm too narrow.
The question, then, is: which way should I go with this model? Go with N Gauge and trains I can just buy; or 2mm Scale and have to build an awful lot of stuff on my own. With the trains, at least, it’s possible to get N Gauge trains and just give them 2mm wheels; because as I said, they’re so close in size that few people can tell the difference. It might be an awkward, fiddly job though.
At the moment, I’m just not sure. Before things go much further, I’ll have to make a decision, and choose to go one way or the other. At least for now.

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