OO gauge

The nominal size 00 (pronounced nominal size zero zero), common in England under the term 4 mm scale, is one by the British Railway Modelling Standards Bureau ( BRMSB ) standard size for model trains. The standard gauge model with a track gauge of 1435 mm case has a model track gauge of 16.5 mm, and is colloquially referred to as track 00. The scale is 1:76. The designation of nominal size 00 is still used in England as the default instead of the nominal size H0.

Nominal size 00 as a historical designation of nominal size H0

The nominal size of 00 is also a historical name given to the now widespread in continental Europe and North America nominal size H0. The standard gauge model with a track gauge of 1435 mm also in this case has a model track width of 16.5 mm. The scale is uniform, however, today 1:87.

The designation of nominal size 00 as original term for the nominal size H0, common in England under the term 3.5 mm scale, should now be used only in historical context, as this can cause confusion.

History

Even before the Second World War there were attempts to develop from the nominal size 0 one half as large nominal size, which was more suitable on the one hand for the construction of home appliances and other hand made ​​it possible to reduce the manufacturing costs. For these efforts, the nominal size H0 developed (pronounced Ha - zero nominal size ) in continental Europe, which was initially referred to as nominal size 00. The standard gauge model with a track gauge of 1435 mm case has a model track gauge of 16.5 mm. The scale is now uniformly 1:87, after originally different scales were consistently close at 1:87. The new nominal size H0 replaced the previously market-dominant role of nominal size 0 and was himself the third market-dominating nominal size.

Gauges

For nominal size 00 are defined by the British Railway Modelling Standards Bureau ( BRMSB ) the following model gauges in scale 1:76,2:

Track EM

The track EM ( EM = eighteen millimeter ) is a mainly used in the UK gauge for model trains in scale 1:76,2 with a track width of 18.2 mm (EM - track). In part, the term 4 mm (4 mm to 1 foot / 4 mm = the 76.2. Portion of a foot ) is used for EM. In contrast to the 00 gauge, they are the standard gauge correctly again. But conditionally private track system and extended- track on this system rolling stock.

History

The track EM during the Second World War by the British Model Railways Standards Bureau ( BRMSB ) with a track width of 18 mm was established (originally referred to as trace EM). Later, the broadening was 18.2 mm ( originally referred to as track EEM ). After the track width of 18.2 mm was generally accepted as the only standard, the track EM has prevailed for the track width 18.2 mm.

In contrast to the 00 gauge, based on the H0- gauge tracks of 16.5 mm running at a scale of 1:76 ( and so seen the standard gauge to narrow reproduces ), enter the EM- track standard gauge scale again.

The original still closer the track S4 or P4 ( or Proto Scale Four Four) comes with a rail distance of 18.83 mm.

As umbrella organizations for these gauges are the EM Gauge Society and Scale Four Society, which also maintain their own websites.

Special

To some extent, in England, used to describe the nominal size, or trace the letter O instead of the number 0.

For the narrow-gauge railways in England the term is inconsistent. In this article, the spelling is uniformly applied as follows: 00 separately for the nominal size and model gauge with a hyphen. Example: 00-12.