May 15, 2012 10:05 am
An 8,000 Ton Giant Made the Jet Age Possible
Hugh Pickens writes "Tim Heffernan writes that when 'The Fifty,' as it's known in company circles, broke down three years ago, there was talk of retiring it for good. Instead, Alcoa decided to overhaul their 50,000-ton, 6-story high forging press, now scheduled to resume service early this year. 'What sets the Fifty apart is its extraordinary scale,' writes Heffernan. 'Its 14 major structural components, cast in ductile iron, weigh as much as 250 tons each; those yard-thick steel bolts are also 78 feet long; all told, the machine weighs 16 million pounds, and when activated its eight main hydraulic cylinders deliver up to 50,000 tons of compressive force.' The Fifty could bench-press the battleship Iowa, with 860 tons to spare but it's the Fifty's amazing precision—its tolerances are measured in thousandths of an inch—that gives it such far-reaching utility. Every manned US military aircraft now flying uses parts forged by the Fifty as does every commercial aircraft made by Airbus and Boeing making the Jet Age possible. 'On a plane, a pound of weight saved is a pound of thrust gained—or a pound of lift, or a pound of cargo,' writes Heffernan. 'Without the ultra-strong, ultra-light components that only forging can produce, they'd all be pushing much smaller envelopes.' The now-forgotten Heavy Press Program (PDF), inaugurated in 1950 and completed in 1957, resulted in four presses (including the Fifty) and six extruders—giant toothpaste tubes squeezing out long, complex metal structures such as wing ribs and missile bodies. 'Today, America lacks the ability to make anything like the Heavy Press Program machines,' concludes Heffernan adding that 'The Fifty' will be supplying bulkheads through 2034 for the Joint Strike Fighter. 'Big machines are the product of big visions, and they make big visions real. How about a Heavy Fusion Program?'" Read more of this story at Slashdot.
Original Link: http://rss.slashdot.org/~r/Slashdot/slashdot/~3/N0bQJw928JQ/an-8000-ton-giant-made-the-jet-age-possible
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