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T-TRAK (all letters capitalized) is a modular model railroad system based on standards for module size, track placement, track interface, and electrical connections. The standards allow for a wide range of flexibility in design yet still maintain interoperability with all modules built per the standards.
Using 32 mm (1.26 in) - 0 gauge - track, there is an extensive range of 16 mm to the foot scale [1:19] live-steam and other types of locomotives, rolling stock and accessories. Many of these models are dual gauge, and can be converted to run on 45 mm (1.772 in) track , and radio control is common.
The tracks are labeled from the viewing aisle by color, starting with Red for the outermost (closest to the viewing aisle) track, Yellow for the center track and Blue for the innermost track. The three tracks are electrically isolated from each other and from any other (optional) tracks on the module. [2]
Railways with a track gauge between 500 mm (19 + 3 ⁄ 4 in) and 4 ft 8 + 1 ⁄ 2 in (1,435 mm) standard gauge. A diamond crossing of tracks of two different gauges A diamond crossing of tracks of two different gauges Narrow-gauge track Comparison of four track gauges
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T-TRAK, [19] is a modular system that uses table-top modules, 2 + 3 ⁄ 4 inches (70 mm) high, which set on tables, that are not part of the modules, but are often found at sites which members meet. It uses a specific track interface, which has joiners which hold the modules together, which enables quick setting up and taking down.
Sizes under 100 lb/yd (49.6 kg/m) rail are usually for lighter duty freight, low use trackage, or light rail. Track using 100 to 120 lb/yd (49.6 to 59.5 kg/m) rail is for lower speed freight branch lines or rapid transit; for example, most of the New York City Subway system track is constructed with 100 lb/yd (49.6 kg/m) rail.
These are to the same scale as US O gauge but are accurate scale models in all dimensions including track and wheels. OJ: 1:45: 24.0 mm O-scale models of 3 ft 6 in narrow-gauge prototypes running on 24 mm gauge track. Virtually unknown outside Japan and Taiwan On2: 1:48: 12.7 mm