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2. Block and tackle - Wikipedia

   en.wikipedia.org/wiki/Block_and_tackle

   The mechanical advantage is 2, requiring a force of only 50 N to lift the load. A block and tackle is characterized by the use of a single continuous rope to transmit a tension force around one or more pulleys to lift or move a load. Its mechanical advantage is the number of parts of the rope that act on the load. The mechanical advantage of a ...

3. Anderton Boat Lift - Wikipedia

   en.wikipedia.org/wiki/Anderton_Boat_Lift

   The Anderton Boat Lift is a two-caisson lift lock near the village of Anderton, Cheshire, in North West England. It provides a 50-foot (15.2 m) vertical link between two navigable waterways: the River Weaver and the Trent and Mersey Canal .

4. Traveller (nautical fitting) - Wikipedia

   en.wikipedia.org/wiki/Traveller_(nautical_fitting)

   A traveller is a part of the rigging of a boat or ship that provides a moving attachment point for a rope, sail or yard to a fixed part of the vessel. It may take the form of anything from a simple ring on a metal bar or a spar to, especially in a modern yacht, a more complex "car" – a component with bearing-mounted wheels running on a shaped aluminium extrusion.

5. Ljungström rig - Wikipedia

   en.wikipedia.org/wiki/Ljungström_rig

   At the top is a metal bracket with pulley for the halyard which then runs inside the mast and comes out below deck, where a pulley is located under the mast root. The mast foot is tapered so the mast stands firmly in the lower tapered ball bearing. Level with the deck is the mast "bottleneck" where the upper ball bearing rests.

6. List of boat lifts - Wikipedia

   en.wikipedia.org/wiki/List_of_boat_lifts

   Geheyan dam boat lift, also in Hubei Province, capable of lifting vessels of 300 tons displacement. The dam was completed in 1994, but technical difficulties delayed the opening of the ship lift for four more years. Longtan dam boat lift, capacity to lift vessels of 250 tons, in a basin 40×10.8×1.8 meters, and a vertical lift of 68.5 meters. [2]

7. Pulley - Wikipedia

   en.wikipedia.org/wiki/Pulley

   A sheave or pulley wheel is a pulley using an axle supported by a frame or shell (block) to guide a cable or exert force. A pulley may have a groove or grooves between flanges around its circumference to locate the cable or belt. The drive element of a pulley system can be a rope, cable, belt, or chain.