Step 1 : Introduction to the question "Despite its nickname, Howard Hughes' "Spruce Goose" was built mainly out of what wood?"
...The "Spruce Goose," Howard Hughes's famous cargo plane, was actually built primarily out of birch wood, not spruce, as the name suggests. Officially named the Hughes H-4 Hercules, the massive aircraft was designed as a solution for transporting troops and materials during World War II, when metal resources like aluminum were in short supply due to war demands. Hughes and his team sought to use wood as an alternative, and while spruce was initially considered, birch was ultimately selected due to its strength and availability during World War II.