The building has a unique shape which has been described as "half a silkworm's cocoon, cut in half the long way." It is 1,175 feet long, 325 feet wide, and 211 feet high, supported by 13 steel arches. There is 364,000 square feet of unobstructed floor space, or an area larger than 8 football fields side-by-side. The airdock has a volume of 55 million cubic feet. A control tower and radio aerial sit at its northeast end. At each end of the building are two huge semi-spherical doors that each weigh 600 tons. At the top, the doors are fastened by hollow forged pins 17 inches in diameter and six feet long. The doors roll on 40 wheels along specially-designed curved railroad tracks, each powered by an individual power plant that can open the doors in about 5 minutes. The airdock is so large that temperature changes within the structure can be very different from that on the outside of the structure. To accommodate these fluctuations, which could cause structural damage, a row of 12 windows 100 feet off the ground was installed. Furthermore, the entire structure is mounted on rollers to compensate for expansion or contraction resulting from temperature changes. When the humidity is high in the Airdock, a sudden change in temperature causes condensation. This condensation falls in a mist, creating the illusion of rain, according to the designer.
History
In 1929, Goodyear Zeppelin Corporation, later Goodyear Aerospace, sought a structure in which "lighter-than-air" ships could be constructed. The company commissioned Karl Arnstein of Akron, Ohio, whose design was inspired by the blueprints of the first aerodynamic-shaped airship hangar, built in 1913 in Dresden, Germany. Construction took place from April 20 to November 25, 1929, at a cost of $2.2 million. The first two airships to be constructed and launched at the airdock were USS Akron, in 1931, and its sister ship, USS Macon, in 1933. They were about 785 feet long. When World War II broke out, enclosed production areas were desperately needed, and the airdock was used for building airships. The last airship built in the airdock was the U.S. Navy's ZPG-3W in 1960. The building later housed the photographic division of the Goodyear Aerospace Corporation. In 1980, the Goodyear Airdock was designated a Historic Civil Engineering Landmark by the American Society of Civil Engineers. The airdock has more recently served as the site of the 1986 kickoff rally for the United Way of Summit County, where 200,000 members of the public visited. Bill Clinton spoke there during his 1992 election campaign, bringing some 30,000 visitors to the site. In 1987, the Loral Corporation purchased Goodyear Aerospace and the Goodyear Airdock as a result of James Goldsmith's greenmailing of Goodyear. The Loral Corporation was purchased by Lockheed Martin in 1996. The airdock is not open to the public, but it can be seen by those traveling on U.S. Route 224 east of downtown Akron.
