View source for 14-in Mark IV Torpedo (UK)

[[File:ARTS1883Plate12.jpg|thumb|600px|'''14-in R.L Mark IV'''{{ARTS1883|Plate 12}}]]
The '''14-in R.L. Mark IV Torpedo''' was an early British torpedo manufactured by the [[Royal Laboratory]].

A [[Royal Navy]] order of 50 of the new model was made in the 1883-84 fiscal year, with 30 the following year.{{ARTS1884|p. 47}} 

In 1885, the British diversified their manufacture base by giving Messrs. [[Greenwood and Batley]] of Leeds a contract to build 100 units at a rate of 20 per year.{{ARTS1885|p. 13}}

Also in 1885, however, the Royal Laboratory at Woolwich was asked to move on to the [[14-in Mark V Torpedo (UK)|Mark V model]] and received an order to make 200 of them.{{ARTS1885|p. 13}}

52 Mark IV torpedoes were found to average 23.69 knots (ranging from 22 to 25.5 knots) over 600 yards with a 70 pound charge of dry gun-cotton in water temperatures between 50 and 70 degrees.{{ARTS1885|p. 13}}

In 1893, the Mark IV (but not the Mark IV*) were to be replaced when newer units became available.{{ARTS1893|p. 36}}

An extensive report on torpedoes being adjusted at the test ranges shows the Mark IV is not in use in 1896.{{ARTS1896|pp. 42-44}}

In 1919, it was approved to break up all 14-in torpedoes except for a reserve of fifty each of {{Torp|14-in Mark X*|UK}} and {{Torp|14-in Mark XI|UK}}.{{ARTS1919|p. 11}}

==Mark IV==
The particulars are detailed in the ''Annual Report of the Torpedo School, 1883''.{{ARTS1883|p. 29}}

==Mark IV*==

An extensive report on torpedoes being adjusted at the test ranges shows the Mark IV* is still in use in 1896, as some were run at Horsea:{{ARTS1896|pp. 42-44}}
* one R.L. torpedo averaged 22.33 knots at 600 yards in 52 degree water.
* two R.L. torpedoes brought in for repair averaged 20.78 knots at 600 yards in 56 degree water.
* one G&B torpedo averaged 20.69 knots at 600 yards in 68 degree water.
* four G&B torpedoes brought in for repair averaged 20.85 knots at 600 yards in 43.25 degree water.

==Footnotes==
{{reflist}}

==Bibliography==
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==See Also==

{{CatTorpedo|14-in|UK}}