More Large Scale (May 2017)
I'm going to continue with last month's subject about "Large Scale Modeling" and address a number of issues modelers face when they first get into the larger scales. The general terms "G" scale or "G" gauge have been incorrectly used to describe "Large Scale" modeling for a very long time and are still being used. This really isn't a problem until you start talking about the actual scale sizes used in large scale model railroading. The common scales range from #1 scale at 1:32 ratio, "A" at 1:29 ratio, 1/2" at 1:24 ratio, "G" at 1:22.5, and "F" at 1:20.3 ratio. In many cases it is common to use the scale ratio to describe the scale size of the model rather that a letter, such "1:29 scale" is used much more so than the term "A" scale.
Now one of the confusing parts is that all of these scales actually are made to run on the same 45 mm "gauge" track which is the correct "standard gauge" for #1 scale models. Technically, all the other scales running on 45 mm Gauge track should be considered to be "narrow gauge" models since they run on track that is narrower than standard gauge would be for their particular scales. There are prototypical modelers that are using the correct standard gauge track for their specific scale ratio models, however, most often they have to hand lay their own track to the correct gauge.
With the increase of Bachmann and other manufacturers making 1:20.3 scale models there is an increase use of the correct term "Fn3". The "F" is the scale of the model, the "n" designates narrow gauge, and the "3" is the actual gauge of the track at 3 feet wide.
We make our large scale couplers in two actual scale ratios #1 scale 1:32 and the large "G" scale 1:22.5. Our #1 scale couplers are used as "standard size" couplers for 1:32 scale models and sometimes on 1:29 scale models. Also, for most narrow gauge modeling, where the couplers were about 3/4 the size of standard couplers, our #1 scale couplers are quite suitable for this in larger scales. Our "G" scale couplers are used for standard size on 1:29 (a bit large looking), 1:24, 1:22.5 and 1:20.3. Although the actual scale ratios are not exacting for the scale of the models the visual differences are not really noticeable. If we made an "F" scale coupler the knuckle (moving part of the head) would only be about .050" taller than our G scale coupler and if you put the two couplers together center to center there would only be .025" difference on the top and bottom. That is not visually significant enough to justify the tooling cost for another size of coupler.
Now make yourself a nice sandwich and enjoy model railroading.