Information from wikipedia:
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. 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, the aircraft was nicknamed the Spruce Goose by critics, although it was made almost entirely of birch. The Hercules is the largest flying boat ever built, and it had the largest wingspan of any aircraft that had ever flown until the Scaled Composites Stratolaunch first flew on April 13, 2019. The aircraft remains in good condition. After having been displayed to the public in Long Beach, California, from 1980 to 1991, it is now on display at the Evergreen Aviation & Space Museum in McMinnville, Oregon, United States.

Specifications:
Length: 218 ft 8 in (66.65 m)
Wingspan: 320 ft 11 in (97.82 m)
Height: 79 ft 4 in (24.18 m)
Fuselage height: 30 ft (9.1 m)
Empty weight: 250,000 lb (113,398 kg)
Powerplant: 8 × Pratt & Whitney R-4360 Wasp Major 28-cylinder air-cooled radial piston engines, 3,000 hp (2,200 kW) each
Propellers: 4-bladed Hamilton Standard, 17 ft 2 in (5.23 m) diameter constant-speed propellers
Cruise speed: 250 mph (400 km/h, 220 kn)
Range: 3,000 mi (4,800 km, 2,600 nmi)
Service ceiling: 20,900 ft (6,400 m)