SPRUCE GOOSE HUGHES H-4 HERCULES Metal ModelSPRUCE GOOSE HUGHES H 4 HERCULES Metal Model The Hughes H 4 Hercules (commonly known as the Spruce Goose) 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. PROTOTYPE HISTORY Here history takes flight with the SPRUCE GOOSE steel DIY model kit by Metal Time Models. Step into the