<P> The Hughes H - 4 Hercules ( also known as the Spruce Goose ; registration NX37602 ) is a prototype strategic airlift flying boat designed and built by the Hughes Aircraft Company . Intended as a transatlantic flight transport for use during World War II , it was not completed in time to be used in the war . The aircraft made only one brief flight on November 2 , 1947 , and the project never advanced beyond the single example produced . Built from wood because of wartime restrictions on the use of aluminum and concerns about weight , it was nicknamed by critics the Spruce Goose , although it was made almost entirely of birch . The Hercules is the largest flying boat ever built , and it has the largest wingspan of any aircraft that has ever flown . The aircraft remains in good condition . After being displayed to the public for almost 11 years in Long Beach , California from 1980 to 1991 , it is now displayed at the Evergreen Aviation & Space Museum in McMinnville , Oregon , United States . </P>
<P> The Hughes H - 4 Hercules ( also known as the Spruce Goose ; registration NX37602 ) is a prototype strategic airlift flying boat designed and built by the Hughes Aircraft Company . Intended as a transatlantic flight transport for use during World War II , it was not completed in time to be used in the war . The aircraft made only one brief flight on November 2 , 1947 , and the project never advanced beyond the single example produced . Built from wood because of wartime restrictions on the use of aluminum and concerns about weight , it was nicknamed by critics the Spruce Goose , although it was made almost entirely of birch . The Hercules is the largest flying boat ever built , and it has the largest wingspan of any aircraft that has ever flown . The aircraft remains in good condition . After being displayed to the public for almost 11 years in Long Beach , California from 1980 to 1991 , it is now displayed at the Evergreen Aviation & Space Museum in McMinnville , Oregon , United States . </P>
what was the spruce goose made out of
what was the spruce goose made out of
almost entirely of birch
almost entirely of birch