On30 (Paperback)

High Quality Content by WIKIPEDIA articles! On30 is the most common term used to describe the modelling of narrow gauge railways in O scale on HO (16.5 mm/0.650 in) gauge track. Other terms used include O16.5, Oe, and On21/2. It is part of the hobby of rail transport modelling. On30 uses the American O scale of 1/4" to the foot, (ratio 1:48) to operate trains on HO gauge (16.5 mm/0.650 in) track. The 30 indicates the scale/gauge combination is used to model 2 ft 6 in (762 mm) (30") narrow gauge prototypes, although it is often used to model 2 ft (610 mm) and 3 ft (914 mm) gauge prototypes as well. This scale/gauge combination is sometimes referred to as On2