Ads
related to: lead weights for boat ballast replacement parts diagram
Search results
Results From The WOW.Com Content Network
They lift more weight than the buntlines, and also have to pull against the sheets - although these will have been released there is still a certain amount of friction produced by the blocks and fairleads that they run through. For this reason the clewlines are usually fitted with blocks to increase the mechanical advantage. The clewlines are ...
The advantage of water ballast is that the tanks can be emptied, reducing draft or the weight of the boat (e.g. for transport on ground) and water added back in (in small boats, simply by opening up the valves and letting the water flow in) after the boat is launched or cargo unloaded.
Clump weights for bells and stages:– A clump weight is a large ballast weight suspended from a cable which runs down from one side of the launch and recovery gantry, through a pair of sheaves on the sides of the weight, and up the other side back to the gantry, where it is fastened. The weight hangs freely between the two parts of the cable ...
This bottom-set gear has two parts: the upper part is a standard gillnet where semi-demersal or pelagic fish can be gilled; the lower part is a trammel net where bottom fish can entangle. The combined nets are maintained more or less vertically in the usual way by floats on the floatline and weights on the groundline. They are set on the bottom.
The ballast is 7,000 lb (3,200 kg), either lead and iron (earlier boats) or all lead, installed inside the keel (which is part of the hull shape) and set in resin. [8] The trade-off for the construction strength is weight; at 19,500 lb (8,800 kg), the Westsail is exceptionally heavy for a 32-foot (9.8 m) boat.
The shot is deployed, generally from a boat, after the dive site is located using position fixing such as GPS and an echo sounder. Shots are more difficult to use in strong currents. The weight may drag along the seabed especially if the divers pull on the line as they descend.
Heavy material that is placed in a position low in the hull to provide stability. It can be moveable material, such as gravel or stones, permanently or semi-permanently installed, or integral to the hull, such as the (typically) lead or cast-iron ballast keel of a sailing yacht. See also in ballast. [3] ballast tank
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.).