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The aircraft made only one brief flight, on November 2, 1947, and the project never advanced beyond the prototype. Built from wood (Duramold process) because of wartime restrictions on the use of aluminum and concerns about weight, the aircraft was nicknamed the Spruce Goose by critics, although it was made almost entirely of birch.
The Hughes H-4 Hercules, made of birch ply Duramold Samples of Duramold at the Evergreen Aviation & Space Museum Duramold is a composite material process developed by Virginius E. Clark . Birch or poplar plies are impregnated with phenolic resin and laminated together in a mold under heat (280 °F, 138 °C) and pressure for use as a lightweight ...
In 1955, Howard Hughes split the helicopter production unit from the Hughes Aircraft Company, and reconstituted it with Hughes Tool Company, calling it Hughes Tool Company's Aircraft Division. The Aircraft Division had a focus on the production of light helicopters, mainly the Hughes 269 / 300 and the OH-6 Cayuse / Hughes 500 .
Aircraft grade plywood is made from three or more plies of birch, as thin as 0.40 millimetres (1 ⁄ 64 in) thick in total, and is extremely strong and light. Howard Hughes' H-4 Hercules was constructed of plywood. The plane was built by the Hughes Aircraft Company employing a plywood-and-resin Duramold process. [15]
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Pages in category "Hughes aircraft" The following 21 pages are in this category, out of 21 total. This list may not reflect recent changes. *
The second prototype, 44-70156, was fitted with conventional single four-bladed propellers, and was flown by Hughes on 5 April 1947. [37] Initially, the USAAF had insisted that Hughes not be allowed to fly the aircraft, but after a personal appeal to Generals Ira Eaker and Carl Spaatz, he was allowed to do so against posting of $5 million in security.
Development of the D-2 began around 1937, but little is known about its early gestation because Hughes' archives on the aircraft have not been made public. Aircraft historian René Francillon speculates that Hughes designed the aircraft for another circumnavigation record attempt, but the outbreak of World War II closed much of the world's ...