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Diagram 3 shows three rope parts supporting the load W, which means the tension in the rope is W/3. Thus, the mechanical advantage is three-to-one. By adding a pulley to the fixed block of a gun tackle the direction of the pulling force is reversed though the mechanical advantage remains the same, Diagram 3a. This is an example of the Luff tackle.
[12] Diagram 3 shows that now three rope parts support the load W which means the tension in the rope is W/3. Thus, the mechanical advantage is three. By adding a pulley to the fixed block of a gun tackle the direction of the pulling force is reversed though the mechanical advantage remains the same, Diagram 3a. This is an example of the Luff ...
Three point lock are also commonly used in wardrobes, like from Hettich [6] [7] Single-point locking may provide adequate security for some situations on tiered lockers, as the doors are shorter, and therefore more difficult to force open; however, the taller doors of full length lockers and cabinets are more susceptible to the application of leverage.
The 390 had a bore of 4.05 inches (102.87 mm), stroke of 3.785 inches (96.14 mm), and displacement of 390.04 cu in (6.4 L). It was the most common FE engine in later applications; used in many Ford cars as the standard engine, including the Thunderbird, and in many trucks as well.
The name, derived from an old English practice of bore measurements in gun-making which refers to a nominally 4-gauge bore, that is, a bore diameter that would accommodate a pure lead round ball weighing 1 ⁄ 4 of a pound. This would imply a bore diameter of 1.052-inch (26.7 mm), however in practice the bore diameter varied greatly as, in ...
In sailing, a block is a single or multiple pulley. One or a number of sheaves are enclosed in an assembly between cheeks or chocks. In use, a block is fixed to the end of a line, to a spar, or to a surface. A line (rope) is reeved through the sheaves, and maybe through one or more matching blocks at some far end, to make up a tackle.
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