Bliss-Leavitt Mark 1 torpedo

• Name — Bliss-Leavitt Mark 1 torpedo • Origin — United States • Type — Anti-surface ship torpedo • Is Ranged — yes • Is Explosive — yes • Is Missile — yes • Service — 1904–1922 • Used By — United States Navy • Designer — Frank McDowell Leavitt • Manufacturer — E. W. Bliss Company • Design Date — 1904 • Number — 250 • Variants — Mod 1 Mod 2 • Weight — approximately 1500 pounds • Length — 197 inches (5.0 meters) • Diameter — 21 inches (53.34 centimeters) • Range — 4000 yards • Filling — wet guncotton • Filling Weight — approximately 200 pounds • Detonation — War Nose Mk 1 contact exploder • Engine — Single, vertical turbine • Speed — 27 knots • Guidance — gyroscope • Launch Platform — battleships, torpedo boats and cruisers

The air flask pressure of the Bliss-Leavitt Mark 1 was 2250 psi; the earlier Whitehead models had a lower flask pressure of 1500 psi. The air in the Mark 1 was heated by burning alcohol in a chamber upstream from the engine; the increased air flask pressure and heated air served to increase the range of the Bliss-Leavitt Mark 1 to 4000 yd at 27 kn. However, it used a single vertical turbine wheel rotating about the torpedo's longitudinal axis and driving a single propeller. This caused an unbalanced torque that was sufficient to cause the Mark 1 to have a tendency to roll. The Bliss-Leavitt Mark 1 was launched from battleships, torpedo boats and cruisers.