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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.
Track centres are usually wider on high-speed lines, as pressure waves knock each other as high-speed trains pass. The minimum track spacing can be derived from the loading gauge. The European Berne Gauge has a width of 3,150 mm (10 ft 4 in). The minimal distance to structures on the side of the track is half of it but that is doubled again for ...
Improved ventilation was needed for the tunnel though, and a forced ventilation fan house was built around the East portal, powered by the same traction current. This involved providing a closed door to the tunnel portal to control airflow, which opened automatically as a train approached. All Z-1s were retired and scrapped in August 1956. [1]
For the construction of the Lötschberg line and the main tunnel two special railways had to be constructed to bring material from Frutigen or the junction at Naters near Brig to the portals of the Lötschberg tunnel. The gauge of the railways was 750 mm (2 ft 5 + 1 ⁄ 2 in), the maximum gradient was 60 per thousand (6%) and the minimum curve ...
The clearance space between a train and the tunnel is often small. Pictured is a London Underground Northern line 1995 Stock train emerging from the tunnel north of Hendon Central station. A loading gauge is a diagram or physical structure that defines the maximum height and width dimensions in railway vehicles and their loads.
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A witness first saw the gun poking through a crack between the apartment door and the frame. There had been a knock and an eerie silence, then an attempt by two men to force the door open.
Post-war, [i] there was a shift from O gauge to half-size scales of HO and OO. Improved technology at this time, particularly for moulded plastic components, made two-rail electrification practical. Many of the new generation of scenic railway modellers scratch-built their new locomotives for two-rail, although this was far from universally ...