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The topping lift indicated Topping lift on a US Yachts US 22 sailboat. The topping lift (more rarely known as an uphaul) is a line which applies upward force on a boom on a sailboat. Part of the running rigging, topping lifts are primarily used to hold a boom up when the sail is lowered. [1]
1 – boom, 2 – mast, 3 – gooseneck, 4 – sail, 5 – topping lift... 7 – mainsheet, 8 – boom vang.... In sailing, a boom is a spar (pole), along the foot of a fore and aft rigged sail, that greatly improves control of the angle and shape of the sail.
While under sail, the opposite force to the vang is supplied by the sail itself. When the sail is furled, a topping lift supplies the upward force on the boom. Some line vang systems incorporate a piston to provide the topping lift force and to damp oscillations. Hydraulic vangs can inherently act in the topping lift role.
Sail components include the features that define a sail's shape and function, plus its constituent parts from which it is manufactured. A sail may be classified in a variety of ways, including by its orientation to the vessel (e.g. fore-and-aft) and its shape, (e.g. (a)symmetrical, triangular, quadrilateral, etc.).
A boomkicker [1] [2] is a modern mechanical device on boats that pushes the boom up by one or more glassfiber rods. If the boom is sheeted in, the rods will bend and produce a force upwards.
Buntlines lift the middle portion of the sail, or "bunt"; there will usually be four to eight buntlines across the foot of the sail. Traditionally they are secured to the sail with buntline hitches. [1] Since buntlines only have to lift a section of canvas, they can be thinner than the clewlines and are not usually fitted with a purchase.
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Cunningham downhaul. In sailing, a cunningham or cunningham's eye is a type of downhaul used on a Bermuda rigged sailboat to change the shape of a sail. It is named after its inventor, Briggs Cunningham, a victorious America's Cup skipper and yacht builder.