Howell torpedo. The Howell Automobile Torpedo was the first self-propelled torpedo produced in quantity by the United States Navy, which referred to it as the Howell Mark I torpedo. It was conceived by Lieutenant Commander John A. Howell, United States Navy, in 1870, using a 60 kg (130 lb) flywheel spun at a very high speed (10,000 to 12,000 rpm) to store energy and drive propellers.

Design

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.

Production

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These fifty would be the only production examples, as the Howell was superseded by a rapidly improving Whitehead in 1892; as a consequence, the Howell's drawbacks were never cured.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".

Surviving examples

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.

See also
 Bliss-Leavitt torpedo
 Schwartzkopff torpedo
 Whitehead torpedo

Citations

General and cited references 
 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)

External links
 History of the Howell Torpedo;  from the U.S. Navy.
 The Remarkable Story of a Howell Torpedo, US Naval Undersea Museum
 Howell Torpedo Display at the US Naval Undersea Museum
 Animation of Howell Torpedo 1896

Torpedoes of the United States