If you think HOn3 and HOn30 is confusing you should look at the different gauge/scale combinations for narrow gauge used in the UK. Appart from G scale there is another large scale called SM32, this is 16mm/ft gauge running on O gauge (32mm) track to represent 2 foot gauge. The British equvalent to On30 is O 16.5, there is also a gauge called O 9 for those wishing to model 18" prototypes in O scale.
In the smaller scales (4mm to the foot) we have OO9 (with kits available for prototypes from 18" to 3" gauge) although there is the more correct OOn3 for the 3" gauges. However, I know of several who use TTn3 (3mm/foot scale on 9mm (n gauge) track to model 3ft gauge prototypes. and then for 2mm/foot narrowgauge there is n6.5 (2mm/foot on Z gauge track) - someone will probably tell me I've forgotton one or two!
Also, to the best of my knowlege there are no-mass produced ready to run British outline narrow gauge models particularly in the smaller scales.
In the smaller scales (4mm to the foot) we have OO9 (with kits available for prototypes from 18" to 3" gauge) although there is the more correct OOn3 for the 3" gauges. However, I know of several who use TTn3 (3mm/foot scale on 9mm (n gauge) track to model 3ft gauge prototypes. and then for 2mm/foot narrowgauge there is n6.5 (2mm/foot on Z gauge track) - someone will probably tell me I've forgotton one or two!
Also, to the best of my knowlege there are no-mass produced ready to run British outline narrow gauge models particularly in the smaller scales.