Thinking of curve radii ...
SWB "tippler" wagons and the like ... 6" minimum radius (As say found in a quarry) Bogie passenger stock ...12" minimum radius (As say chugging up a Welsh hillside behind a double-Fairley)
... acceptable values??? Comments please as I'm currently drawing out new plans.
For guidance I'm thinking of having 040T SWB engines working a Quarry and
062T operating an associated passenger line.