Difference between revisions of "21-in Mark II Torpedo (UK)"
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===Mark II=== | ===Mark II=== | ||
In 1909-1910, 4 hook bracket torpedoes were ordered.{{CN}} | In 1909-1910, 4 hook bracket torpedoes were ordered.{{CN}} | ||
+ | |||
+ | In May, 1918, the torpedo and its Mark II* variant were noted as having the following settings at a charge of 2350 pounds per square inch, though each torpedo would have either the 35 or 44.5 knot setting, but not both:{{GFGTO|p. 16}} | ||
+ | * 44.5 knots to 4200 yards (High Speed) | ||
+ | * 35 knots to 6000 yards (High Speed) | ||
+ | * 23 knots to 14,000 yards (Medium Speed) | ||
+ | * 18 knots to 17,000 yards (E.R.) | ||
+ | |||
+ | The 2350 psi pressure was the "action" pressure; normal was 2200. Ranges were 300 yards less at 44.5 knots and 1,000 yards less at lower speeds at the normal pressure. | ||
==Mark II*== | ==Mark II*== |
Revision as of 15:31, 2 May 2013
![](/tfs/images/thumb/0/0a/ARTS1909Plate1.jpg/600px-ARTS1909Plate1.jpg)
The 21-in R.G.F. Mark II Torpedo was a British torpedo developed at the Royal Gun Factory and first ordered for service in 1909-1910.[Citation needed]
Development and History
It was developed in parallel with the Mark I torpedo, which was shorter at 18.5 feet.
Mark II
In 1909-1910, 4 hook bracket torpedoes were ordered.[Citation needed]
In May, 1918, the torpedo and its Mark II* variant were noted as having the following settings at a charge of 2350 pounds per square inch, though each torpedo would have either the 35 or 44.5 knot setting, but not both:[2]
- 44.5 knots to 4200 yards (High Speed)
- 35 knots to 6000 yards (High Speed)
- 23 knots to 14,000 yards (Medium Speed)
- 18 knots to 17,000 yards (E.R.)
The 2350 psi pressure was the "action" pressure; normal was 2200. Ranges were 300 yards less at 44.5 knots and 1,000 yards less at lower speeds at the normal pressure.
Mark II*
Introduced in 1914, these featured rectified threads throughout, air vessel pressures of 2,350 psi for 10,750 yard range and two other improvements.[3]
Mark II**
Introduced in 1914, these included the improvements of the II** and added three other small features.[4]
Mark II***
Mark II***
In 1915, Commander-in-Chief Home Fleet wanted a proportion of torpedoes able to reach the greatest possible range. By year's end, trials of a torpedo with a projected range of 18,000 yards at 19-20 knots were anticipated.[5]
Footnotes
Bibliography