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发表于 2008-7-25 21:32:07
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The Hughes H-4 Hercules (registration NX37602) is a "one-off" heavy transport aircraft designed and built by the Hughes Aircraft company. The aircraft made its first and only flight on 2 November 1947. Built from wood due to wartime raw material restrictions on the use of aluminum, it was nicknamed the "Spruce Goose" by its critics, some of whom accused Howard Hughes of misusing government funding to build the aircraft. The Hercules is the largest flying boat ever built, and has the largest wingspan and height of any aircraft in history. It survives in good condition at the Evergreen Aviation Museum in McMinnville, Oregon.
Due to wartime restrictions on the availability of metals, the H-4 was built almost entirely of laminated birch, not spruce as its nickname suggests. The Duramold process,[2] a form of composite technology, was used in the laminated wood construction. The aircraft was considered a technological tour de force. It married a soon-to-be outdated technology, flying boats, to a massive airframe that required some truly ingenious engineering innovations to function. Ultimately, however, due to delays and cost overruns, the project was cancelled.
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