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A chimney cowl or wind directional cap is a helmet-shaped chimney cap that rotates to align with the wind and prevent a downdraft of smoke and wind down the chimney. An H-style cap is a chimney top constructed from chimney pipes shaped like the letter H. It is an age-old method of regulating draft in situations where prevailing winds or ...
Since the beginning of the Industrial Revolution, tall chimneys were built, at the beginning with bricks, and later also of concrete or steel.Although chimneys never held the absolute height record, they are among the tallest free-standing architectural structures and often hold national records (as tallest free-standing or as overall tallest structures of a country).
The chimney (smokestack or stack in American and Canadian English) is the part of a steam locomotive through which smoke leaves the boiler. As well, steam locomotive exhaust systems typically vent cylinder steam exhaust through the chimney, to enhance the draught through the boiler.
Hot-air balloon chimney suspension has also been proposed. A form of solar boiler technology placed directly above the turbine at the base of the tower might increase the up-draught. [citation needed] Moreno (2006) proposed that a chimney can be economically placed on a hill or mountain slope. [22]
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A Skyhook balloon launched in 1957 to photograph the Sun. Skyhook balloons were high-altitude balloons developed by Otto C. Winzen and General Mills, Inc.They were used by the United States Navy Office of Naval Research (ONR) in the late 1940s and 1950s for atmospheric research, especially for constant-level meteorological observations at very high altitudes.