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Hangar One is one of the world's largest freestanding structures, covering at the Moffett Field airship hangars site at Moffett Field in Mountain View, in Santa Clara County of the southern San Francisco Bay Area, California. The massive hangar has long been one of the most recognizable landmarks of California's Silicon Valley. An early example of mid-century modern architecture, it was built in the 1930s as a naval airship hangar for the USS ''Macon''. ==Design and construction== Designed by German air ship and structural engineer Dr. Karl Arnstein, Vice President and Director of Engineering for the Goodyear Zeppelin Corporation of Akron, Ohio, in collaboration with Wilbur Watson Associates Architects and Engineers of Cleveland, Ohio, Hangar One is constructed on a network of steel girders sheathed with galvanized steel. It rests firmly upon a reinforced pad anchored to concrete pilings. The floor covers 8 acres and can accommodate six (6) (360 feet x 160 feet) American football fields. The airship hangar measures long and wide. The building has an aerodynamic architecture. Its walls curve inward to form an elongated approximate catenary form 198 feet (60 m) high. The clam-shell doors were designed to reduce turbulence when the ''Macon'' moved in and out on windy days. The "orange peel" doors, weighing 200 short tons (180 metric tons) each, are moved by their own motors operated via an electrical control panel. The hangar's interior is so large that fog sometimes forms near the ceiling. A person who is unaccustomed to the building's extension is susceptible to optical disorientation. Looking across its deck, planes and tractors appear like toys. Looking up, a network of catwalks for access to all parts of the structure can be seen. Two elevators meet near the top, allowing maintenance personnel to get to the top quickly and easily. Narrow gauge tracks run through the length of the hangar. During the period of lighter-than-air dirigibles and non-rigid aircraft, the rails extended across the apron and into the fields at each end of the hangar. This tramway facilitated the transportation of an airship on the mooring mast to the hangar interior or to the flight position. During the brief period that the ''Macon'' was based at Moffett, Hangar One accommodated not only the giant airship but several smaller non-rigid lighter-than-air craft simultaneously. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Hangar One (Mountain View, California)」の詳細全文を読む スポンサード リンク
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