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The Heavy Press Program was a Cold War-era program of the United States Air Force to build the largest forging presses and extrusion presses in the world. These machines greatly enhanced the US defense industry's capacity to forge large complex components out of light alloys such as magnesium and aluminium. The program began in 1950 and concluded in 1957 after construction of four forging presses and six extruders, at an overall cost of $279 million. Eight of them are still in operation today, manufacturing structural parts for military and commercial aircraft. They still hold the records for size in North America, though they have since been surpassed by presses in Japan, France, Russia and China. The program produced ten machines: The American Society of Mechanical Engineers designated the 50,000-ton Alcoa and Wyman-Gordon presses as Historic Mechanical Engineering Landmarks. The Alcoa press weighs 8,000 tons and is 87 feet (26.5 meters) tall. The die table is 26 feet by 12 feet (7.9 by 3.7 meters), and the maximum stroke is 6 feet (1.82 meters). The Heavy Press Program was motivated by experiences from World War II. Germany held the largest heavy die forging presses during the war, and translated this advantage into high performance jet fighters. The Soviet Union captured the largest German press to survive the war, with a capacity of 33,000 ton, and were suspected to have seized the designs for an even larger 55,000 ton press. The next two largest units were captured by the United States and brought across the Atlantic, but they were half the size at 16,500 ton. As cold war fears developed, American strategists worried that this would give the Soviet Air Force a crucial advantage and designed the Heavy Press Program to help win the arms race.〔 History of the Loewy Press at Wyman-Gordon〕〔 History of the Mesta Press at Alcoa〕 Seventeen presses were originally planned with an expected cost of $389 million, but the project was scaled back to 10 presses in 1953. Air Force Lieutenant General K. B. Wolfe was the primary advocate for the Heavy Press Program. Alexander Zeitlin was another prominent figure of the program. ==References== 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「Heavy Press Program」の詳細全文を読む スポンサード リンク
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