by tzor on Tue Dec 18, 2018 4:11 pm
It's probably best to post this here than in the other thread but one key element in model train layout design (and why certain styles requires certain scales) is what I could effectively call the "one cubit rule." That is to say all parts of the layout have to be reachable from the edge of the table. (In case you need to fix something, grab a derailed train, etc.)
In some cases you can be clever about it. You can have a mountain that you can lift so as to access the area around the mountain. But let's for a moment consider the repercussions about how "deep" you can have a layout from the edge of the table to the center. We will use a 20" span for reference.
O scale is 1:43 so that would be around 70'
HO scale is 1:87 so that would be around 145'
N scale is 1:148 so that would be around 246'
For reference a football field is 160' feet wide. A football field is only a small portion of a football stadium so you would probably need to have an access panel if you wanted to model the railroads that go into (for example) the MetLife Stadium (of course in the larger scale you could have the access panel in the football field itself, but in that case the building would be the whole layout being over ten feet wide in O scale.
The largest yard on the LIRR, Sunnyside yard has a length of a mile and a half which would be 53 feet long in the small n scale. I can't get a good number for the max width but looking at maps I see a ration of 3.5 : 1 so that would mean 15 feet wide in the proper scale. Needless to say, no one is going to model that yard in N scale. In the even smaller Z scale it would only be 10' wide.
