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Gooseneck swivel on jigger-mast of Nippon Maru sail training vessel in Yokohama harbor. The gooseneck is the swivel connection on a sailboat by which the boom attaches to the mast. The boom may pivot in any direction, from side to side or up and down, by swiveling on the gooseneck. [1] The gooseneck may be a two-axis swivel as pictured.
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.
Kicking straps / boom vangs, which control a boom-footed sail's leech tension by exerting downward force mid-boom. Normally this is a system of highly geared blocks, of flexible stainless steel wire and low stretch cordage but recently some sail boats have a short spar instead, often of carbon fibre.
The vang typically runs from the base of the mast to the boom. Due to the great force necessary to change the height of the boom while a boat is under sail, a line-based boom vang usually includes some sort of a pulley system. Hydraulic piston vangs are used on larger sailboats and controlled by manual or electric hydraulic pumps. [2]
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] This line would run from near the free end of the boom(s) forward to the top of the mast.
AXP PE Ratio data by YCharts. And it isn't just the P/E ratio that's elevated. The price-to-sales, price-to-cash flow, price-to-book value, and price-to-earnings ratios are all above their five ...
Standing rigging on a fore-and-aft rigged sailboat. Key: 1. Forestay 2. Shroud 3. (Spreaders) 4. Backstay 5. Inner forestay 6. Sidestay 7. (Boom) 8. Running backstays Standing rigging on a square-rigged vessel (illustrated left), which supports a mast comprising three steps: main, top, and topgallant (illustrated right). The shrouds support ...
Egg prices continue to soar — if shoppers can even find them in grocery stores. In January alone, the cost of eggs around the U.S. jumped more than 15% from a year ago, to roughly $4.95 a dozen ...