Showing my ignorance of prototype matters, what sort of bogie, particularly for passenger coaches are or were used on British and similarly constructed NG railways, especially from pre-preservation days rather than modern ones though that would be of interest too.
I imagine they were rather simpler than standard gauge, not having to deal with high speeds and various related oscillations.
Thanks!
Considering the state of much NG track which was usually worse than SG track I expect them to be roughly the same as SG! It does seem to vary, but most bogies just look like scaled down version of SG ones, certainly in the early/mid 20thC.