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The amount of tumblehome is one of the key design choices when specifying a narrowboat, because the widest part of a narrowboat is rarely more than 7 feet across, so even a modest change to the slope of the cabin sides makes a significant difference to the "full-height" width of the cabin interior.
A narrowboat is a particular type of canal boat, built to fit the narrow locks of the United Kingdom. The UK's canal system provided a nationwide transport network during the Industrial Revolution , but with the advent of the railways, commercial canal traffic gradually diminished and the last regular long-distance transportation of goods by ...
Examples are the Anderton Boat Lift, Falkirk Wheel and Combe Hay Caisson Lock. Inclined planes raise a canal boat up a hill on a track, powered by a pulley mechanism. Examples are the Hay Inclined Plane, Foxton Inclined Plane and Worsley Underground Incline. Tunnels take canal boats horizontally through a rock formation.
The scow in particular, in the form of the scow schooner, was the first significant example of a hard-chine sailing vessel. While sailing scows had a poor safety reputation, that was due more to their typical cheap construction and tendency to founder in storms. As long as it sailed in the protected inland and coastal waters it was designed to ...
The gunwale of an undecked boat. The gunwale (/ ˈ ɡ ʌ n əl /) is the top edge of the hull of a ship or boat. [1]Originally the structure was the "gun wale" on a sailing warship, a horizontal reinforcing band added at and above the level of a gun deck to offset the stresses created by firing artillery.
The caisson lock is a type of canal lock in which a narrowboat is floated into a sealed watertight box and raised or lowered between two different canal water levels. It was invented in the late 18th century as a solution to the problem posed by the excessive demand for water when conventional locks were used to raise and lower canal boats ...
A plan and side view of a generic, empty canal lock. A lock chamber separated from the rest of the canal by an upper pair and a lower pair of mitre gates.The gates in each pair close against each other at an 18° angle to approximate an arch against the water pressure on the "upstream" side of the gates when the water level on the "downstream" side is lower.
Diagram of Ruston Proctor Steam Capstan, 1883 Hydraulic capstan left after dockland redevelopment in London Capstan in Belfast, Northern Ireland Capstan on the USS Cairo. Capstan winches were also important on sailing trawlers (e.g. Brixham trawlers) as a means for fetching in the nets after the trawl. When they became available, steam powered ...