3 mm scale, also known as 3 mm finescale, is a model railway scale of 3 mm: 1 ft used for British prototypes. Introduced as British
TT gauge, it sits approximately halfway between British
N gauge and
OO gauge, but is not as popular as either and there is no longer any mass manufacturer ready-to-run support. When
TT gauge model railways were developed for British prototypes, in order to fit the small British prototypes, the scale was enlarged but without altering the
12mm gauge. The result,
British TT gauge
3 mm scale, also known as 3 mm finescale, is a model railway scale of 3 mm: 1 ft used for British prototypes. Introduced as British TT gauge, it sits approximately halfway between British N gauge and OO gauge, but is not as po ...
, is too narrow. This led to the development of gauge
3mm finescale
3 mm scale, also known as 3 mm finescale, is a model railway scale of 3 mm: 1 ft used for British prototypes. Introduced as British TT gauge, it sits approximately halfway between British N gauge and OO gauge, but is not as po ...
. Thus two
finescale standards were developed. By far the more common of these is 14.2 mm gauge track, which is accurate. Some modellers choose to use slightly narrower 13.5 mm track due to the necessary oversize motion of outside-
cylindered steam locomotives.
British TT, also known as TT3, was pioneered by Triang Railways as ready-to-run models.
Other gauges are also used to model other prototypes (
Irish broad gauge
The track gauge adopted by the mainline railways in Ireland is . This unusually broad track gauge is otherwise found only in Australia (where it was introduced by the Irish railway engineer F. W. Sheilds), in the states of Victoria, southern New ...
,
Brunel gauge). For narrow gauges,
N gauge 9 mm track represents gauge;
Z gauge track represents to {{RailGauge, 2ft2in gauge.
The ''3mm Society'' caters for all modellers of 3 mm scale.
See also
*
Rail transport modelling scales
*
Model railway scales
References
External links
3mm Society3mm Supplier