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The boat enters the lock. 8–9. The boat enters the lock. 3. The lower gates are closed. 10. The upper gates are closed. 4–5. The lock is filled with water from upstream. 11–12. The lock is emptied by draining its water downstream. 6. The upper gates are opened. 13. The lower gates are opened. 7. The boat exits the lock. 14. The boat exits ...
A boat lift, ship lift, or lift lock is a machine for transporting boats between water at two different elevations, and is an alternative to the canal lock. It may be vertically moving, like the Anderton boat lift in England , rotational, like the Falkirk Wheel in Scotland , or operate on an inclined plane , like the Ronquières inclined plane ...
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 ...
The lock chambers are massive concrete structures. The side walls are from 45 to 55 ft (14 to 17 m) thick at the bases; toward the top, where less strength is required, they taper down in steps to 8 ft (2.4 m). The center wall between the chambers is 60 ft (18 m) thick and houses three galleries that run its full length.
When the boat did resume its journey, the lock keeper followed on horseback, all the way to Cumberland (the end of the canal) with a club threatening to settle things. [8] There were plenty of incidents with negligent lock keepers. On September 11, 1895 at Lock 22, the boat Excelsior arrived, and tried to lock through. The lock keeper was so ...
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Generally, boat building books have a detailed description of the lofting process, beyond the scope of this article. Plans can be lofted on a level wooden floor, marking heavy paper such as Red Rosin for the full-sized plans or directly on plywood sheets. Two men lifting templates in the mold loft, Tyneside Shipyards, 1943
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