There have been a number of 18-inch torpedoes in service with the United States. These have been used on ships and submarines of the US Navy. American "18-inch" torpedoes were actually in diameter, beginning with the "Fiume" Whitehead torpedo of 1890.
Ship classes that carried 18-inch torpedoes include:
Aylwin-class destroyers B-class through some R-class submarines Bainbridge-class destroyers Cassin-class destroyers Cincinnati-class cruisers Columbia-class cruisers Illinois-class battleships Indiana-class battleships Kearsarge-class battleships Maine-class battleships Montgomery-class cruisers Paulding-class destroyers Pennsylvania-class cruisers Plunger-class submarines Smith-class destroyers Truxtun-class destroyers
NameCountryIn service datePlatform / targetDimensionsWarheadPropulsionPerformance"Fiume" Whitehead torpedo1894Surface / SurfaceDiameter: Length: Weight: GuncottonCompressed airSpeed: Range: Mark 4 (Bliss-Leavitt) 1908–1922 Submarine / Surface ship Diameter: Length: Weight: Vertical Turbine Mark 6 (Bliss-Leavitt)1911–1922Surface / Surface shipDiameter: Length: Weight: TurbineSpeed: Range: Mark 7 (Bliss-Leavitt (Short)1917Submarine / Surface shipDiameter: Length: Weight: TNTTurbineSpeed:Mark 7 (Bliss-Leavitt)(long)1912–1945Submarine & Surface / Surface shipDiameter: Length: Weight: TNTTurbineSpeed: Range: or Whitehead torpedo Mk.1 (short)1894–1913Surface / Surface shipDiameter: Length: Weight: GuncottonAir-flask Brotherhood pattern engineSpeed: Range: Whitehead torpedo Mk.1 (long)1894–1922Surface / Surface shipDiameter: Length: Weight: GuncottonAir-flask Brotherhood pattern engineSpeed: Range: Whitehead torpedo Mk.2 (short)1896–1913Surface / SurfaceDiameter: Length: Weight: GuncottonAir-flask Brotherhood pattern engineSpeed: Range: Whitehead torpedo Mk.2 (long)189?–1922Surface / SurfaceDiameter: Length: Weight: GuncottonAir-flask Brotherhood pattern engineSpeed: Range: Whitehead torpedo Mk.31898–1922Surface / SurfaceDiameter: Length: Weight: GuncottonAir-flask Brotherhood pattern engineSpeed: Range: Whitehead torpedo Mk.51910–1922Surface & Submarine / SurfaceDiameter: Length: Weight: GuncottonHeated Air-flask Brotherhood pattern engineLow: Range: Medium: Range: High: Range:
See also American 21-inch torpedo
External links Torpedo history, part 2, Naval History & Heritage Command Navweaps links: US Torpedoes main page, Pre-World War II, Post-World War II