OON

Oon or OON may refer to:

00n3

00n3 is a model railway standard for modelling 3 ft (914 mm) narrow gauge railways in 4 mm scale scale with 12 mm (0.472 in) gauge track. 3 ft (914 mm) prototypes were common in Ireland and the Isle of Man, but the scale is not generally used outside the British Isles. 12 mm (0.472 in) gauge track is the same as that used in TT scale and HOm, so some components used for those scales can be used.

There is no ready-to-run support, so everything must be either built from scratch or made from kits available from Worsley Works, Backwoods Miniatures, Parkside Dundas, Ninelines and Alphagraphix amongst others. Kits are available in etched brass and nickel-silver (locos, railcars and some rolling stock), plastic, resin, white metal and card (rolling stock). There are now some 3D printed items of stock available.

00n3 modellers have close relations with other 4 mm narrow gauge modellers, especially 009 modelling.

Exhibition layouts

00n3 layouts that are occasionally exhibited in Britain and Ireland (2015) include Annascaul (Tralee & Dingle Light Railway), Burtonport (Letterkenny & Burtonport Extension Railway), Castlederg (Castlederg & Victoria Bridge Tramway), Letterkenny (County Donegal Railway), Castlefinn (County Donegal Railway), Schull (Schull & Skibbereen Railway), Crosby (Isle of Man Railway), Strabane (County Donegal Railway) and Mannin Middle (Isle of Man Railway inspired layout).