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OO gauge or OO scale (also, 00 gauge and 00 scale) is the most popular standard gauge model railway standard in the United Kingdom, [1] outside of which it is virtually unknown. OO gauge is one of several 4 mm-scale standards (4 mm to 1 ft (304.8 mm), or 1:76.2), and the only one to be marketed by major manufacturers.
Little trains dodge in and out of the tunnels like rabbits in a warren! [1] Rabbit warrens began their popularity in the mid-1960s, [4] [5] with the new H0e gauge narrow gauge models from Egger-bahn and later Jouef / Playcraft. These modelled the style of 600 mm Decauville or feldbahn types, although their scale gauge was closer to 750 mm gauge ...
The entrance and exit points were on a different levels with a smooth gradient required throughout. The construction team used Archimedes' principle and a long clear tube filled with fluid to establish a datum height across any two points on the site so a consistent gradient could be calculated. When the build was underway it was discovered the ...
The term HOn30 (and sometimes HOn2½) is generally used when modelling American prototypes while H0e is used for European prototypes. In Britain, the term OO9 is used. [1] All these terms refer to models of narrow-gauge railways built to the world's most popular model railway scale of HO (1:87) but using a track gauge of 9 mm (0.354 in)—the gauge used for N scale models of standard-gauge ...
Thus the scale and approximate prototype gauge are represented, with the model gauge used (9 mm for H0e gauge; 6.5 mm for H0f gauge) being implied. [ 2 ] The scales used include the general European modelling range of Z, N, TT, H0, 0 and also the large model engineering gauges of I to X, including 3 + 1 ⁄ 2 , 5, 7 + 1 ⁄ 4 and 10 + 1 ⁄ 4 ...
The Wrights Tunnel (also known as the Summit Tunnel, Tunnel 2, or Tunnel 1 after the daylighting of the Cats Canyon tunnel) is a railroad tunnel located in the Santa Cruz Mountains in Santa Clara and Santa Cruz Counties, California. Opened in 1880 after almost two years of construction involving numerous fatalities, the tunnel was at one point ...
EM gauge was an earlier attempt in the 1950s to improve the inaccuracies of OO gauge, with wider, more accurate track at 18 mm (0.709 in) between the rails, but still narrower than the correct gauge. The gauge was later widened to 18.2 mm (0.717 in). The UK-based EM Gauge Society exists to supports modellers of these standards.
The structure gauge S requires buildings to be placed at minimum of 3,100 mm (10 ft 2 + 1 ⁄ 16 in) from the track centreline. Bridges and tunnels must have a clearance of at least 4,900 mm (16 ft 15 ⁄ 16 in) wide and 6,400 mm (20 ft 11 + 15 ⁄ 16 in) high.