Yes, HO outside is possible – at least in weather friendly SoCalif. Of course there is the summer heat. Now, why would a clear-thinking RR enthusiast want to go outside with HO? In my case, the desire to run very looooog trains and have as much open track as possible. Try 100’ straight along the side of a fence to a dog-bone return. As to applications in our garden RRs, picture an HO freight dragging 50 cars at the back side of a garden RR, appropriately scaled with cliffs, rocks, and trestles to suggest distance. This will be my next RR stunt.
Has anyone combined the two scales, either indoors or out, to enhance the sense of space – and offer more to watch?
NOTE: Will the track hold up? I used the fiber-tied ATLAS brand track and then coated the ties with marine spec clear. Granted, that was 30+ years ago. The last contact with the track was prior to the home sold – that’s was four years after installation in the sun and minimal rain without any determinate damage.
Wendell