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Double purchase counterweight systems are sometimes used where the vertical travel of the counterweight arbor would be inadequate due to limited fly space or stage-level wing space. In systems of this type, the operating and lift lines are double-purchased so that the batten will travel twice the distance of the arbor.
A simple crane. A counterweight is a weight that, by applying an opposite force, provides balance and stability of a mechanical system. [1] The purpose of a counterweight is to make lifting the load faster and more efficient, which saves energy and causes less wear and tear on the lifting machine.
where is the force applied to the hauling part of the line (the input force), is the weight of the load (the output force), is the ideal mechanical advantage of the system (which is the same as the number of segments of line extending from the moving block), and is the mechanical efficiency of the system (equal to one for an ideal frictionless ...
In theatrical rigging, the venue may have one or more of these systems: Dead Hung, where the rigging points are fixed to the ceiling. [1] This is usually found in/over the house because of space requirements. It is also found in school theaters to save space and money. A hemp rigging system. A counterweight rigging system.
A bascule bridge (also referred to as a drawbridge or a lifting bridge) is a moveable bridge with a counterweight that continuously balances a span, or leaf, throughout its upward swing to provide clearance for boat traffic. It may be single- or double-leafed. The name comes from the French term for balance scale, which employs the same principle.
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A rope and pulley system—that is, a block and tackle—is characterised by the use of a single continuous rope to transmit a tension force around one or more pulleys to lift or move a load—the rope may be a light line or a strong cable. This system is included in the list of simple machines identified by Renaissance scientists. [10] [11]
The RCH-155 module is very similar to the Artillery Gun Module (AGM, Artillerie-Geschütz-Modul), but has a lower profile. [3] The AGM was designed to have the firepower of the PzH 2000 in an air-portable package with the A400M aircraft this was possible when installed on an ASCOD-2 platform (known as the DONAR).