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The rails were surfaced with a half-inch thick, two and a half-inch wide (1.3 cm × 6.4 cm) iron strap screwed to the top. After a short time in service, the hemlock was discovered to be too soft, and a 4-inch (10 cm) wide hardwood board was positioned under the iron. [5]
The Cowlairs incline was an example of this, with a continuous rope used on this section from 1842 until 1908. The middle section of the Erkrath-Hochdahl Railway in Germany (1841–1926) had an inclined plane where trains were assisted by rope from a stationary engine and later a bank engine running on a second track.
The winch consists of a gas-powered engine, spool, rope, frame, and sometimes a simple transmission. The person being towed walks (or swims) away from the winch, while extending the rope. When the winch is engaged, it pulls the boarder in at a speed ranging from 25 to 40 kilometres per hour (16 to 25 mph).
The most popular webbing width is 25 mm (1 in) [2] but 38 mm (1.5 in) and 50 mm (2 in) are also very common. Narrower webbing is frequently looped through chock stones, which are jammed into cracks as safety anchors. In other cases, webbing is looped over rock outcroppings. Webbing is less likely to loosen itself off the rock than tubular rope.
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A winch is affixed to one or both ends, and a cable or rope is wound around the winch, pulling a weight attached to the opposite end. The Greek scientist Archimedes was the inventor of the windlass. [1] A surviving medieval windlass, dated to 1360 –1400, is in the Church of St Mary and All Saints, Chesterfield. [2]