The Pacific War Online Encyclopedia
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||21" by 21'7"
53.3cm by 6.579m
|Range||5000 yards (4570m) at 45.5 knots
7000 yards (6400m) at 41 knots
|Warhead||805 lbs Torpex
365 kg Torpex
|Propulsion||Kerosene-air burner-cycle semi-diesel four-cylinder radial
The Mark VIII was first accepted in September 1932 following a design process that compared favorably with that of the problematic U.S. Mark 14, which the Mark VIII exceeded in most performance measures. Depth keeping problems had been ironed out and development of a magnetic detonator had been abandoned in favor of the completely reliable Type 3 contact detonator. The torpedo was supplied to submarines and motor torpedo boats and was the most heavily used British torpedo of the war. Some 3732 were expended by September 1944, which was 56.4% of the total British torpedo expenditure.
several slightly different versions, some optimized for external
torpedo tubes and others capable of running as deep as 75 feet
for antisubmarine use.
The Mark VIII remained in service as late as
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