Howell torpedo

• Name — Howell torpedo • Origin — United States • Type — Anti-surface ship torpedo • Is Ranged — yes • Is Explosive — yes • Is Missile — yes • Service — 1890–1898 • Used By — United States Navy • Designer — John A. Howell • Manufacturer — Hotchkiss Ordnance Company • Design Date — 1870 • Production Date — 1889 • Number — 50 units • Weight — 580 lbs (263.1 kg) • Length — 132 inches • Diameter — 14.2 inches (335.3 cm) • Range — 400 yards (365.8 m) • Filling — wet guncotton • Filling Weight — 100 lbs (45.4 kg) • Detonation — Contact device • Engine — Flywheel • Speed — 25 knots • Launch Platform — Battleships and torpedo boats

• Illustration — Howell torpedo's general longitudinal section from US Navy manual, 1896 Because it had no complicated engine and fuel system, the Howell was much cheaper and easier to build than its main competitor, the Whitehead. In addition, unlike the Whitehead, the Howell was wakeless, not giving away the position of the firing vessel; its flywheel was, however, very noisy. It did demand a steam turbine to "spin up" the flywheel (a complication inherent to the design). Also unlike the contemporary Whitehead, the Howell kept running in a straight line, due to the gyroscopic effect of the flywheel. A wave coming from one side would tend to roll the Howell rather than deviate it. The roll was easily corrected by the rudders. Depth control was regulated by a pendulum as in the 'secret' pioneered by Robert Whitehead. The Howell was the first torpedo to use the gyroscope effect, which Howell patented. When, in an attempt to improve directional stability, Whitehead (using a Ludwig Obry design) adopted the gyroscope in 1895, Howell sued for patent infringement.

• Illustration — A Hotchkiss Ordnance Company advertisement for Howell torpedoes, published November 11, 1888 • Illustration — Torpedo Boat Stiletto launching a Howell torpedo, c. 1890 After very protracted developmentthe product of a paucity of funds, the novelty of the torpedo as a weapon, and myopia of the Navy's senior officersfifty Howell Torpedoes Mark 1 were ordered (from Hotchkiss Ordnance Company of Providence, Rhode Island) in 1889. This was 14.2 in (36 cm) diameter, 129.75 in (330 cm) long, with a 96 lb (43.5 kg) warhead and a range of 400 yd (365 m) at 25 knots (46 km/h). Contemporary Whiteheads, built by E. W. Bliss Company, had superior performance, and greater growth capacity. These fifty would be the only production examples, as the Howell was superseded by a rapidly improving Whitehead in 1892; as a consequence, the Howell's drawbacks were never cured. It is, therefore, impossible to know if quieting would have mitigated any loss of surprise to noise (as sometimes suggested). A contemporary account of an operational test carried out on a Howell torpedo described its performance, where it "ran along the surface at a very fast but very regular speed for four minutes" and that there was "no horizontal deviation and the run was fully 900 yards".

• Illustration — Howell torpedo flywheel • Illustration — Rear view, showing the propeller In May 2013, a Howell torpedo was discovered in two pieces on the seabed by US Navy-trained dolphins, near Coronado, California. Prior to this discovery, only two Howell torpedoes were known to exist: one at the Naval Undersea Museum and the other at the Naval War College Museum in Newport, R.I.

• Blair, Clay. Silent Victory. Philadelphia: Lippincott, 1975 • "Howell torpedo", in The Columbia Encyclopedia, Sixth Edition, online • Fitzsimons, Bernard, general editor. "Howell", in The Encyclopedia of Twentieth Century Weapons and Warfare. London: Phoebus/BBC, 1978. Volume 13, page 1371. • Kirby, Geoff. "A History of the Torpedo The Early Days", in The Journal of the Royal Navy Scientific Service, Vol 27 No 1. • Milford, Frederick J. "US Navy Torpedoes--Part One: Torpedoes through the thirties", in The Submarine Review, April 1996. (a quarterly publication of the Naval Submarine League, Annandale, VA)