"Bliss-Leavitt Mark 4 torpedo"@en . . "yes"@en . . "submarines"@en . "The Bliss-Leavitt Mark 4 torpedo was a Bliss-Leavitt torpedo developed and produced by the E. W. Bliss Company in 1908. It was the first American-built torpedo specifically designed to be launched from a submarine. About 100 Mark 4s were purchased for experimental purposes by the United States Navy, which led to design improvements to the gyro and the reducing valve. The Mark 4 and all other torpedoes designed before the Bliss-Leavitt Mark 7 torpedo, were considered obsolete and withdrawn from service in 1922."@en . . . "yes"@en . "1908"^^ . "197"^^ . . "Bliss-Leavitt Mark 4 torpedo"@en . "1908"^^ . "War Nose Mk 1 contact exploder"@en . . . "Vertical turbine"@en . . . "The Bliss-Leavitt Mark 4 torpedo was a Bliss-Leavitt torpedo developed and produced by the E. W. Bliss Company in 1908. It was the first American-built torpedo specifically designed to be launched from a submarine. About 100 Mark 4s were purchased for experimental purposes by the United States Navy, which led to design improvements to the gyro and the reducing valve. The Mark 4 and all other torpedoes designed before the Bliss-Leavitt Mark 7 torpedo, were considered obsolete and withdrawn from service in 1922."@en . . "yes"@en . . . . . "100"^^ . . "gyroscope"@en . "approximately 1500 pounds"@en . . "Mod 1"@en . "17.7"^^ . .