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A flagpole, flagmast, flagstaff, or staff is a pole designed to support a flag. If it is taller than can be easily reached to raise the flag, a cord is used, looping around a pulley at the top of the pole with the ends tied at the bottom. The flag is fixed to one lower end of the cord, and is then raised by pulling on the other end.
The Independence Flagpole was the location where the Philippine flag was hoisted on July 4, 1946, when full independence was achieved from the United States. The flagpole was designed to be at 45.72 m (150.0 ft) high but was damaged by Typhoon Angela (Rosing) in 1995 reducing the flagpole's height to just 32 m (105 ft).
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.
Pages for logged out editors learn more. ... Print/export Download as PDF ... Description = Pulley diagram with 4 pulleys |Source = self-made |Date = 2006 ...
Thus, both arms could be used to raise the flag and a larger, heavier flag could be employed. Nevertheless, signalmen required great strength to use a 4-foot flag on a 16-foot pole. Even a light wind would multiply the difficulty and rain made the flag heavier. Contemporary flags were heavier than modern equivalents, being made of linen [12] or ...
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A gin pole in use loading logs A gin pole used to install a weather vane atop the 200-foot steeple of a church Roof trusses being assembled with gin poles. A gin pole is a mast supported by one or more guy-wires that uses a pulley or block and tackle mounted on its upper end to lift loads. The lower end is braced or set in a shallow hole and ...