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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 .
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 ...
[2]: 133–134 When his compatriots arrived at the crash site Hughes said "We can fix her; she'll go faster." Hughes later made minor changes to the H-1 Racer to make it more suitable for a transcontinental speed record attempt. The most significant change was the fitting of a new set of wings of increased span, giving it a lower wing loading.
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Engineer, thermodynamicist, pioneer developer of practical all-metal airframe structures, first used in the 1915-16 Junkers J 1, using all-cantilever structural concepts meant to place all strength-bearing components within an airframe's outer envelope and established all-metal aircraft manufacturing techniques later used by American designer ...
Early models used aluminum alloy seats made by the Budd Company, while later models used plywood seats made by Hughes Aircraft Company. Early models had metal floors and flaps, while later models used wood for both. The vertical and horizontal stabilizers were made of spruce spars, covered with 1 ⁄ 16 inch (1.6 mm) plywood. According to ...