21-in Mark II Torpedo (UK): Difference between revisions

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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.
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*===
Introduced in 1914, these featured rectified threads throughout, air vessel pressures of 2,350 psi for 10,750 yard range and two other improvements.{{ARTS1914|p. 9}}
Introduced in 1914, these featured rectified threads throughout, air vessel pressures of 2,350 psi for 10,750 yard range and two other improvements.{{ARTS1914|p. 9}}


Line 27: Line 27:
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.
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**===
Introduced in 1914, these included the improvements of the II** and added three other small features.{{ARTS1914|p. 9}}
Introduced in 1914, these included the improvements of the II** and added three other small features.{{ARTS1914|p. 9}}


Line 38: Line 38:
The 2500 psi pressure was the "action" pressure; normal was 2350.  Ranges were 300 yards less at 44.5 knots and 1,000 yards less at lower speeds at the normal pressure.
The 2500 psi pressure was the "action" pressure; normal was 2350.  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***===
In May, 1918, the Mark II**-II*** torpedoes were noted as having the following settings at a charge of 2500 pounds per square inch, though each torpedo would have either the 35 or 44.5 knot setting, but not both:{{GFGTO|p. 16}}
In May, 1918, the Mark II**-II*** torpedoes were noted as having the following settings at a charge of 2500 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 4,200 yards (High Speed)
* 44.5 knots to 4,200 yards (High Speed)
Line 47: Line 47:
The 2500 psi pressure was the "action" pressure; normal was 2350.  Ranges were 300 yards less at 44.5 knots and 1,000 yards less at lower speeds at the normal pressure.
The 2500 psi pressure was the "action" pressure; normal was 2350.  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****===
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.{{ARTS1915|p. 37}}
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.{{ARTS1915|p. 37}}


Line 58: Line 58:
The 2500 psi pressure was the "action" pressure; normal was 2350.  Ranges were 300 yards less at 44.5 knots and 1,000 yards less at lower speeds at the normal pressure.
The 2500 psi pressure was the "action" pressure; normal was 2350.  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*****===
In May, 1918, the these torpedoes were noted as having the following settings at a charge of 2500 pounds per square inch, though each torpedo would have either the 35 or 44.5 knot setting, but not both:{{GFGTO|p. 16}}
In May, 1918, the these torpedoes were noted as having the following settings at a charge of 2500 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 4,200 yards (High Speed)
* 44.5 knots to 4,200 yards (High Speed)

Revision as of 15:36, 2 May 2013

R.G.F. Torpedoes Mark I and II, 1909[1]

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 4,200 yards (High Speed)
  • 35 knots to 6,000 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]

In May, 1918, the torpedo and its Mark II ancestor 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:[4]

  • 44.5 knots to 4,200 yards (High Speed)
  • 35 knots to 6,000 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 included the improvements of the II** and added three other small features.[5]

In May, 1918, the Mark II**-II*** torpedoes were noted as having the following settings at a charge of 2500 pounds per square inch, though each torpedo would have either the 35 or 44.5 knot setting, but not both:[6]

  • 44.5 knots to 4,200 yards (High Speed)
  • 35 knots to 6,000 yards (High Speed)
  • 23 knots to 15,000 yards (Medium Speed)
  • 18 knots to 18,000 yards (E.R.)

The 2500 psi pressure was the "action" pressure; normal was 2350. Ranges were 300 yards less at 44.5 knots and 1,000 yards less at lower speeds at the normal pressure.

Mark II***

In May, 1918, the Mark II**-II*** torpedoes were noted as having the following settings at a charge of 2500 pounds per square inch, though each torpedo would have either the 35 or 44.5 knot setting, but not both:[7]

  • 44.5 knots to 4,200 yards (High Speed)
  • 35 knots to 6,000 yards (High Speed)
  • 23 knots to 15,000 yards (Medium Speed)
  • 18 knots to 18,000 yards (E.R.)

The 2500 psi pressure was the "action" pressure; normal was 2350. Ranges were 300 yards less at 44.5 knots and 1,000 yards less at lower speeds at the normal pressure.

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.[8]

In May, 1918, the Mark II**-II*** torpedoes were noted as having the following settings at a charge of 2500 pounds per square inch, though each torpedo would have either the 35 or 44.5 knot setting, but not both:[9]

  • 44.5 knots to 4,200 yards (High Speed)
  • 35 knots to 6,000 yards (High Speed)
  • 23 knots to 15,000 yards (Medium Speed)
  • 18 knots to 18,000 yards (E.R.)

The 2500 psi pressure was the "action" pressure; normal was 2350. Ranges were 300 yards less at 44.5 knots and 1,000 yards less at lower speeds at the normal pressure.

Mark II*****

In May, 1918, the these torpedoes were noted as having the following settings at a charge of 2500 pounds per square inch, though each torpedo would have either the 35 or 44.5 knot setting, but not both:[10]

  • 44.5 knots to 4,200 yards (High Speed)
  • 35 knots to 6,000 yards (High Speed)
  • 24 knots to 15,000 yards (Medium Speed)
  • 19 knots to 18,000 yards (E.R.)

The 2500 psi pressure was the "action" pressure; normal was 2350. Ranges were 300 yards less at 44.5 knots and 1,000 yards less at lower speeds at the normal pressure.

Footnotes

  1. ↑ Annual Report of the Torpedo School, 1909. Plate 1.
  2. ↑ Grand Fleet Gunnery and Torpedo Orders. p. 16.
  3. ↑ Annual Report of the Torpedo School, 1914. p. 9.
  4. ↑ Grand Fleet Gunnery and Torpedo Orders. p. 16.
  5. ↑ Annual Report of the Torpedo School, 1914. p. 9.
  6. ↑ Grand Fleet Gunnery and Torpedo Orders. p. 16.
  7. ↑ Grand Fleet Gunnery and Torpedo Orders. p. 16.
  8. ↑ Annual Report of the Torpedo School, 1915. p. 37.
  9. ↑ Grand Fleet Gunnery and Torpedo Orders. p. 16.
  10. ↑ Grand Fleet Gunnery and Torpedo Orders. p. 16.

Bibliography

See Also

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