The TBD Devastator was the Navy's first all-metal, monoplane torpedo bomber. It was also the Navy's first carrier-based plane to come with an enclosed cockpit, and the first to use main landing gear wheel brakes. While most carrier-based aircraft of the day had manually folded wings for storage aboard ship, the TBD featured hydraulic folding wings. The plane had a crew of three (pilot, bombardier and gunner) and carried a half-ton torpedo. It entered service with the fleet in 1937. An aircraft of advanced design in 1934, the Devastator was obsolete by 1942. Its first six months of combat would be its last. The TBD was withdrawn from front-line service in the summer of 1942, but continued in service as an advanced trainer until the end of the war. A total of 130 TBDs were built.