I just received a contact from Harris Blowmeyer, commenting that certain O-scale structures are too large for use with On30. In his case, he’s wondering about O scale water tanks.
The trick here is to remember that, while On30 trains are in fact O scale, they’re models of much smaller trains than O scale standard gauge trains, and structures like water tanks, coaling facilities, etc., will be proportionally smaller.
The obvious solution is that one should use models of narrow gauge prototypes for water tanks, sand towers, coal towers and the like. A less obvious solution is that some S-scale structures are sized quite nicely to stand in on an On30 layout — especially for Maine two-foot prototypes.