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With lug bolts, on the other hand, the whole hub usually has to be replaced in case of stripped threads in the hub. One motivation for using lug bolts instead of wheel studs and nuts the number of parts that needs to be attached to the wheel hub. Wheel studs and lug nuts consist of two parts, while the lug bolt is a single part.
A lugger is usually a two- or three-masted vessel, setting lug sails on each mast. [a] A jib or staysail may be set on some luggers. More rarely, lug topsails are used by some luggers — notably the chasse-marée. A lug sail is an asymmetric quadrilateral sail that fastens to a yard (spar) along the head (top edge) of the sail.
The torque applied to the fastener must be determined such that it does not contribute to a service condition where the fastener enters a low-cycle fatigue regime. In general, the use of torque-to-yield fasteners is deprecated except in cases where the materials and structures comprising the entire assembly are certified to be within tolerances.
Lug sails are divided into three types: standing lug, balance lug (or balanced lug) and dipping lug. [1] Dipping lug: This is a boom-less sail whose yard is lowered or "dipped" when tacking to bring the sail around to the leeward side of the mast. In some cases this can be done by partially lowering the yard - there are a number of variations ...
The applied torque causes the bolt to "climb" the thread causing a tensioning of the bolt and an equivalent compression in the components being fastened by the bolt. The preload developed in a bolt is due to the applied torque and is a function of the bolt diameter, the geometry of the threads, and the coefficients of friction that exist in the ...
The capsize screening formula (CSF) is a controversial method of establishing the ability of boats to resist capsizing. It is defined for sailboats as: Beam / ((Displacement/64.2) 1/3), with Displacement measured in pounds, and Beam in feet.
Bollard pull is a conventional measure of the pulling (or towing) power of a watercraft.It is defined as the force (usually in tonnes-force or kilonewtons (kN)) exerted by a vessel under full power, on a shore-mounted bollard through a tow-line, commonly measured in a practical test (but sometimes simulated) under test conditions that include calm water, no tide, level trim, and sufficient ...
Four-oared yal of Boat-Base Monterey sailing in Moss Landing, California, 2002. Length – 5.26 m Width – 1.61 m This yal is able to carry up to eight people. The four-oared yal is rigged with a split-lug sail on a single mast, and sometimes can be supplied with outboard motor. Often referred to as a "gig" (gichka in Russian).
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