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The steep hill along Queen Anne Avenue has grades of up to 19 percent between Mercer and Comstock. [1] [a] The initial cable car service to the top of the hill that was completed in 1891 used a route north via Second Avenue from the existing cable car powerhouse at Denny Way and 2nd, west via Aloha Street to Queen Anne Avenue, then north via Queen Anne to the terminus at Highland Drive. [3]
According to one account, Kelly climbed his first pole at the age of seven, and at nine he performed a "human fly" trick, climbing up the side of a building. [1]He is credited with popularizing the pole-sitting fad after sitting atop a flagpole in 1924, either in response to a dare from a friend [7] or as a publicity stunt to draw customers to a Philadelphia department store. [8]
The lift lines of a counterweight rigging systems are typically a specific type of steel wire rope known as galvanized aircraft cable (GAC). Oil-free 0.25-inch (6.4 mm) diameter, 7 x 19 strand, GAC is the most common counterweight system lift line. It has a minimum cable breaking strength of approximately 7,000 pounds (3,200 kg). Line control
The segments can be either direct point-to-point links, or multi-point links, which are attained through branching units. At each cable landing point, a FLAG cable station is located. The total route length exceeds 27,000 kilometres (16,777 miles; 14,579 nautical miles), and comprises 1,020 kilometres (634 miles) of terrestrial crossings.
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]
One of the bullwheels is usually attached to a cable tensioning system, which is usually either hydraulic or fixed counterweights. A double-grooved bullwheel may be used by some ropeways, whereby two cables travelling at the same speed, or the same cable twice, loop around the bullwheel. The bullwheel began use in farm implements with the ...
A hydraulic launch track has a trough running along its center, a "catch car" that connects to the train for launching travels through this trough. The catch car is connected to a cable loop that runs along the entire length of the launch track, anchored by a pulley wheel at the near end of the track and by the launch motor itself at the far ...
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.
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