18-in Mark V Torpedo (UK): Difference between revisions

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[[File:ARTS1890Plate1.jpg|thumb|600px|'''Short 18-in Torpedoes, 1890'''{{ARTS1890|Plate 1}}]]
 
[[File:ARTS1891Plate5.jpg|thumb|600px|'''18-in R.G.F. Torpedo Tail, 1891'''{{ARTS1891|Plate 5}}]]
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The final design came from Design A which was used in comparative tests conducted in 1899 and 1900.  It featured a modified afterbody.{{ARTS1901|p. 36}}
The final design came from Design A which was used in comparative tests conducted in 1899 and 1900.  It featured a modified afterbody.{{ARTS1901|p. 36}}


===Particulars===
==Mark V==
The final design's characteristics are detailed in the ''Annual Report of the Torpedo School, 1901''.{{ARTS1901|pp. 36-7}}
The final design's characteristics are detailed in the ''Annual Report of the Torpedo School, 1901''.{{ARTS1901|pp. 36-7}}
{{TBC}}
{{TBC}}
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The construction was very similar in materials to the 14-in Mark IX torpedo.


* Diameter: 17.71 inches
==Mark V*==
* Length: 16 feet, 7.4 inches
Perhaps introduced in 1902.{{FC}}
* Weight with pistol, without air: 1,156 pounds
* Metacentric height: at least .575 inches
* C.G. distance from tip of shaft, no air: 114.175 inches
* C.G. distance from tip of shaft, 60 pounds air: 114.35 inches
* Warhead:  200 pounds wet guncotton
It carried a charge of 170 pounds, 15 ounces &ndash; the same as in the [[18-in R.G.F. Mark III Torpedo|Mark III torpedo]].


It had a Brotherhood engine of 3.25x3 inches.
==Mark V* G.S.==
 
[[File:ARTS1913Plate3.jpg|thumb|600px|'''Mark V* G.S. Torpedo'''{{ARTS1913|Plate 3}}]]
Mean pitch of propellors was 40 inches. When charged with air, the torpedo must pass through a gauge 9 inches long and 17.725 inches internal diameter.
Mark V* G.S. torpedoes were introduced in 1913{{FC}} to be fired from the beam tubes of E Class Submarines.  Removal of the guide strips permitted them to be fired from bow or stern tubes. The passing conditions for the V* G.S. were 31.75-32.25 knots to 1,000 yards when fired from a frame, with a drop in speed not to exceed 1 knot. It was noted that the torpedoes would run 0.5 knots faster than their stamped speed when run without guide strips in place.{{ARTS1913|p. 12}}
 
With pistol and charged with 60 pounds of air was ballasted and adjusted to float horizontally and upright in salt water at a density of 1.026 and 60 degree temperature.  In fresh water, with pistol and no air, it had a buoyancy of 31 pounds.  
 
The proof and passing tests were six runs when charged to 1,350 psi:
* two runs from a submerged frame at target 800 yards distant
* two runs from an A.W. tube at least four feet above the water at a target 400 yards away
* one run above water at target 800 yards away
* one run from submerged frame at target 800 yards away
 
The limits of deviation permitted were:
* lateral deviation from the submerged frame must be less than 12 yards either way throughout run
* from A.W. tube, lateral deviation of 8 yards at 400 yards or 24 yards at 600 yards
* deviation from set depth not to exceed +/- 18 inches
 
The speeds required were:
* not less than 30 knots to 600 yards and 29 knots to 800 yards in 60 degrees and warmer
* not less than 29.5 knots to 600 yards and 28.5 to 800 yards in 50-60 degrees
* at least 29 knots to 600 yards and 28 knots to 800 yards in water colder than 50 degrees
 
Endurance was tested in just one torpedo in a batch of twenty, after passing the above tests:
# make six short runs from above water gun 10 feet or more above water
# be fired from submerged frame and pass within 14 yards of target at 800 yards
# it must then "shew no signs of weakness or distortion"
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==Manufacture and Use==
==Manufacture and Use==
The first order was made in the 1901-1902 programme, for a conservative 25 units from the Royal Gun Factory.{{ARTS1901|p. 36}}
The first order was made in the 1901-1902 programme, for a conservative 25 units from the Royal Gun Factory.{{ARTS1901|p. 36}}


==Mark V*==
===1905===
Perhaps introduced in 1902.{{FC}}
In 60 degree water, 18-in Mark V H.B. were approved for the setting of 1,500 yards at 21.75 +/- 0.25 knots at 1,400 pounds pressure, and the V* H.B. torpedoes 25.25 knots +/- 0.25 at 1,700 pounds.  The S.L.L.R. Mark V* torpedoes reached 26.75 knots and the S.L.S.R. torpedoes achieved 30.75 knots at the same 1,700 pounds.{{PQDNO1905|p. 440}}
 
===1918===
10 of 120 remaining Mark V torpedoes were broken up in 1918.  Mark V* torpedoes were apparently not to be culled.{{ARTS1918|p. 10. (G. 8472/18)}}


==Mark V* G.S.==  
===1919===
Mark V* G.S. torpedoes were introduced in 1913{{FC}} to be fired from the beam tubes of E Class Submarines.  Removal of the guide strips permitted them to be fired from bow or stern tubes.  The passing conditions for the V* G.S. were 31.75-32.25 knots to 1,000 yards when fired from a frame, with a drop in speed not to exceed 1 knot.  It was noted that the torpedoes would run 0.5 knots faster than their stamped speed when run without guide strips in place.{{ARTS1913|p. 12}}
In 1919, it was decided to break up none of the 112 remaining Mark V H.B. torpedoes, and to break up 90 Mark V* H.B. and S.L. torpedoes, leaving 321 remaining.{{ARTS1919|p. 12}}


==Footnotes==
==Footnotes==

Latest revision as of 16:22, 30 July 2014

The 18-in R.G.F. Mark V Torpedo was a British torpedo developed at the Royal Gun Factory in 1899 and approved for orders in 1901.[1]

Development and History

The final design came from Design A which was used in comparative tests conducted in 1899 and 1900. It featured a modified afterbody.[2]

Mark V

The final design's characteristics are detailed in the Annual Report of the Torpedo School, 1901.[3] [TO BE CONTINUED - TONE]

Mark V*

Perhaps introduced in 1902.[Fact Check]

Mark V* G.S.

Mark V* G.S. Torpedo[4]

Mark V* G.S. torpedoes were introduced in 1913[Fact Check] to be fired from the beam tubes of E Class Submarines. Removal of the guide strips permitted them to be fired from bow or stern tubes. The passing conditions for the V* G.S. were 31.75-32.25 knots to 1,000 yards when fired from a frame, with a drop in speed not to exceed 1 knot. It was noted that the torpedoes would run 0.5 knots faster than their stamped speed when run without guide strips in place.[5]

Manufacture and Use

The first order was made in the 1901-1902 programme, for a conservative 25 units from the Royal Gun Factory.[6]

1905

In 60 degree water, 18-in Mark V H.B. were approved for the setting of 1,500 yards at 21.75 +/- 0.25 knots at 1,400 pounds pressure, and the V* H.B. torpedoes 25.25 knots +/- 0.25 at 1,700 pounds. The S.L.L.R. Mark V* torpedoes reached 26.75 knots and the S.L.S.R. torpedoes achieved 30.75 knots at the same 1,700 pounds.[7]

1918

10 of 120 remaining Mark V torpedoes were broken up in 1918. Mark V* torpedoes were apparently not to be culled.[8]

1919

In 1919, it was decided to break up none of the 112 remaining Mark V H.B. torpedoes, and to break up 90 Mark V* H.B. and S.L. torpedoes, leaving 321 remaining.[9]

Footnotes

  1. ↑ Annual Report of the Torpedo School, 1901. p. vi.
  2. ↑ Annual Report of the Torpedo School, 1901. p. 36.
  3. ↑ Annual Report of the Torpedo School, 1901. pp. 36-7.
  4. ↑ Annual Report of the Torpedo School, 1913. Plate 3.
  5. ↑ Annual Report of the Torpedo School, 1913. p. 12.
  6. ↑ Annual Report of the Torpedo School, 1901. p. 36.
  7. ↑ Principal Questions Dealt with by the Director of Naval Ordnance, 1905. p. 440.
  8. ↑ Annual Report of the Torpedo School, 1918. p. 10. (G. 8472/18).
  9. ↑ Annual Report of the Torpedo School, 1919. p. 12.

Bibliography

See Also

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