dps@sri-unix (12/14/82)
HO scale is the 1/87 proportion business (O scale is 1/48, OO is a little bit bigger than HO (I forget how much) but is chiefly British, and their 1:1 scale stuff is on the small size, so it looks like our HO) HOn3 is HO scale, narrow gauge -- rails 3 ft apart HOn2 1/2 is HO scale, narrow gauge -- rails 2 1/2 ft apart (a modeler's compromise that let's them use N scale standard gauge track) HOn2 is HO scale, narrow gauge -- rails 2 ft apart (mostly in the Maine woods) NOTE THAT YOU CAN ALSO HAVE: On3 -- O scale, narrow gauge, 3 ft spread On2 1/2, On2 etc... Sn3 -- S scale ... TTn3 -- TT scale Zn3 -- Z scale ad infinitum, ad nauseum. The important thing is SCALE tells you how big your ruler is, GAUGE tells you how many rulers to use.