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The widest military airplane

The widest military airplane (with the biggest wingspan) in the world is the Hughes HK-1: "Spruce Goose", which had about 97meters (320 feet) wingspan.

spruce_gooseHoward Hughes's famous HK-1 Hercules is a cargo-type flying boat Originally conceived by Henry J. Kaiser, a steelmaker and builder of Liberty ships, the aircraft was designed and constructed by Hughes and his staff. The original proposal for the enormous, 400,000-pound wooden flying boat, with its spectacular 320-foot wingspan, came from the U.S. government in 1942. The goal was to build a cargo and troop carrier that did not require critical wartime materials; in other words, that substituted wood for metal. Throughout its construction, considerable controversy surrounded its funding. After a disgruntled U.S. Senator dubbed the HK-1 a "flying lumberyard," the "Spruce Goose" nickname was coined — Hughes despised the name!