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Counterweight of elevator Concrete counterweights on a tower crane Bascule bridge with concrete counterweight. Metronome: A wind-up mechanical metronome has an adjustable weight and spring mechanism that allows the speed to be adjusted by placement of the weight on the spindle. The tempo speed is decreased by moving the weight to a higher ...
An Earth-based space elevator would consist of a cable with one end attached to the surface near the equator and the other end attached to a counterweight in space beyond geostationary orbit (35,786 km altitude). The competing forces of gravity, which is stronger at the lower end, and the upward centrifugal pseudo-force (it is actually the ...
Dr Edwards received his PhD degree in Physics from the University of Wisconsin–Madison in 1990. [2] His thesis work was in astrophysics on the soft x-ray background.During his graduate work, he worked on x-ray micro calorimeters and several sounding rocket and Shuttle payloads.
This action is powered by the traction machine which is directed by the controller, typically a relay logic or computerized device that directs starting, acceleration, deceleration and stopping of the elevator cab. The weight of the counterweight is typically equal to the weight of the elevator cab plus 40–50% of the capacity of the elevator.
Brittle bars alongside the sheaves detect the rope coming out of the track. They may also be placed to detect counterweight or hydraulic ram movement beyond safe parameters (sometimes called a brittle fork in this usage) and to detect detached carriers leaving the terminal's track. If a brittle bar breaks, it interrupts a circuit which causes ...
Sarmont theorized in 1994 that the skyhook could be cost competitive with what is realistically thought to be achievable using a space elevator. [ 11 ] In 2000 and 2001, Boeing Phantom Works , with a grant from NASA Institute for Advanced Concepts , performed a detailed study of the engineering and commercial feasibility of various skyhook designs.
The steelyard exemplifies the law of the lever, wherein, when balanced, the weight of the object being weighed, multiplied by the length of the short balance arm to which it is attached, is equal to the weight of the counterweight multiplied by the distance of the counterweight from the pivot. [2]
[1] [2] More experienced surfers may attempt riskier maneuvers such as jumping between moving elevators, or riding the elevator's counterweight. Elevator surfing is typically considered a form of urban exploration, aligned more with investigative experiences like rooftopping and tunnel hacking than with adventurous urban sports like train ...