Mountain railway

A mountain railway is a railway that ascends and descends a mountain slope that has a steep grade. There are funiculars that use a winch and cables to haul a cable car or wagons up and down a generally straight track. There are also centre traction rail systems that may use a rack and pinion system or a friction wheel system that allows the railway locomotives to haul themselves up the rail. Mountain railways commonly have a narrow gauge to allow for tight curves in the track and reduce tunnel size, and hence construction cost and effort.

Without a mountain railway system, on steep grades gravity can apply sufficient adhesion to the locomotives' wheels to overcome the friction between the wheels and the rails, and the locomotive will simply slide down the track. Ordinarily, railway locomotives require grades no steeper than 1 in 40 (21/2%)for practical operations. While ordinary railway locomotives can operate on grades as steep as 1 in 20 (31/3%), their hauling capacity is limited and more powerful locomotives are normally required. Traction rail systems can easily operate on grades as steep as 1 in 12 (81/3%), a grade that challenges all but the lightest locomotives or railcars.

On even steeper grades cables are used. The car itself is often custom built for the slope, with specially raked seating and steps rather than a sloped floor. Taken to its logical conclusion as the slope becomes vertical, a funicular becomes an elevator (British English: lift).

Contents

List of mountain railways

Australia

Brazil

France

Germany

India

Italy

Japan

New Zealand

Spain

Switzerland

United Kingdom

Isle of Man

United States

See also

de:Bergbahn

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