Birkenhead Class Cruiser (1915): Difference between revisions

From The Dreadnought Project
Jump to navigationJump to search
(Update ships)
Line 84: Line 84:
In 1916, it was decided that all light cruisers of ''Bristol'' class and later should have torpedo firing keys (Pattern 2333) fitted on the fore bridge, in parallel with those in the CT, and that a flexible voice pipe be fitted between these positions.{{ARTS1916|p. 146}}
In 1916, it was decided that all light cruisers of ''Bristol'' class and later should have torpedo firing keys (Pattern 2333) fitted on the fore bridge, in parallel with those in the CT, and that a flexible voice pipe be fitted between these positions.{{ARTS1916|p. 146}}


Additionally, in 1916, [[Birkenhead Class Cruiser (1915)|''Birkenhead'']] and [[Calliope Class Cruiser (1914)|''Calliope'']] classes were being fitted with [[Chadburn Torpedo Telegraph]]s for torpedo order and gyro angle with one transmitter in the fore bridge position and one in the after position, operating separate instruments in the submerged torpedo flat.  A mechanical reply was provided.{{ARTS1916|p. 30}}
Additionally, in 1916, [[Birkenhead Class Cruiser (1915)|''Birkenhead'']] and [[Calliope Class Cruiser (1914)|''Calliope'']] classes were being fitted with [[Chadburn's Torpedo Telegraph]]s for torpedo order and gyro angle with one transmitter in the fore bridge position and one in the after position, operating separate instruments in the submerged torpedo flat.  A mechanical reply was provided.{{ARTS1916|p. 30}}


==See Also==
==See Also==

Revision as of 14:28, 28 November 2012

The two light cruisers of the Birkenhead Class were completed in 1915 and 1916.

They were often regarded as the last sub-type of the encompassing "Town" class which also included the five Bristol, four Weymouth, six Chatham, and four Birmingham class cruisers.

Overview of 2 vessels
Citations for this data available on individual ship pages
Name Builder Laid Down Launched Completed Fate
Birkenhead Cammell Laird 27 Mar, 1914 18 Jan, 1915 May, 1915 Sold 26 Oct, 1921
Chester Cammell Laird 7 Oct, 1914 8 Dec, 1915 May, 1916 Sold 9 Nov, 1921

Armament

The ships were armed as follows.[1]

Guns

  • Ten 5.5-in 50cal B.L. Mark I
  • One 3-in 20cwt Mark I on H.A. mounting

Torpedoes

  • Two Elswick 6.8m 21-in submerged broadside tubes forward depressed 2 degrees and bearing 90. Impulse from Elswick H.P. air.[2]

Chester successfully fired torpedoes at 25 knots, but Birkenhead fired one at 22 knots which failed to run, having seemingly been bound up. No conclusion was reached.[3]

Fire Control

Mechanical Aid-to-Spotter

By 1920, both ships were equipped with Mechanical Aid-to-Spotter Mark II*s with Evershed Bearing Transmitters.[4] The installations generally consisted of placing one on each side of the foretop, driven by flexible shafting from a gearbox on the director tower.[5]

Supplies of these devices began in June 1918.[6]

Range Dials

As of 1920, neither ship seems to have been equipped.[7]

Rangefinders

Evershed Bearing Indicators

The Centaur class were the first light cruisers fitted with Evershed gear for gun control, but it is not clear whether older light cruisers were ever fitted.[8]

Orders for Evershed installations for searchlight control from February 1917 first applied to the Danae class, but seem unlikely to have applied to earlier ships.[9]

Gunnery Control

Directors

Both were fitted with directors in 1917 and 1918.[10]

The director was on a pedestal mounting in a tower on the foremast. Likely, "X" or "Y" served as a directing gun.[11]

Transmitting Stations

Dreyer Table

These ships had no fire control tables.[12]

Fire Control Instruments

Torpedo Control

In 1916, it was decided that all light cruisers of Bristol class and later should have torpedo firing keys (Pattern 2333) fitted on the fore bridge, in parallel with those in the CT, and that a flexible voice pipe be fitted between these positions.[13]

Additionally, in 1916, Birkenhead and Calliope classes were being fitted with Chadburn's Torpedo Telegraphs for torpedo order and gyro angle with one transmitter in the fore bridge position and one in the after position, operating separate instruments in the submerged torpedo flat. A mechanical reply was provided.[14]

See Also

Footnotes

  1. ↑ Conway's All the World's Fighting Ships 1906–1921. p. 58.
  2. ↑ Annual Report of the Torpedo School, 1915. p. 36.
  3. ↑ Annual Report of the Torpedo School, 1916. p. 75.
  4. ↑ Manual of Gunnery (Volume III) for His Majesty's Fleet, 1920. p. 35.
  5. ↑ Manual of Gunnery (Volume III) for His Majesty's Fleet, 1920. p. 35, 37.
  6. ↑ The Technical History and Index, Vol. 3, Part 23. pp. 25-6.
  7. ↑ absent from Manual of Gunnery of H.M. Fleet, Volume III, 1920, p. 45.
  8. ↑ The Technical History and Index, Vol. 3, Part 23. p. 29.
  9. ↑ The Technical History and Index, Vol. 3, Part 23. p. 29.
  10. ↑ The Technical History and Index, Vol. 3, Part 23. pp. 11-12.
  11. ↑ Handbook of Captain F.C. Dreyer's Fire Control Tables, 1918., p. 142 and plate opposite.
    I am inferring that the 2 light cruisers shown in the plate are meant to represent those with and without a tower.
  12. ↑ absent from list in Handbook of Capt. F.C. Dreyer's Fire Control Tables, p. 3.
  13. ↑ Annual Report of the Torpedo School, 1916. p. 146.
  14. ↑ Annual Report of the Torpedo School, 1916. p. 30.

Bibliography

  • H.M.S. Vernon. (Jan 1916) Annual Report of the Torpedo School, 1915. C.B. 1166. Copy 1025 at The National Archives. ADM 189/35.
  • Admiralty, Gunnery Branch (1917). The Director Firing Handbook. O.U. 6125 (late C.B. 1259). Copy No. 322 at The National Archives. ADM 186/227.
  • Admiralty, Gunnery Branch (1910). Handbook for Fire Control Instruments, 1909. Copy No. 173 is Ja 345a at Admiralty Library, Portsmouth, United Kingdom.
  • Admiralty, Gunnery Branch (1918). Handbook of Captain F. C. Dreyer's Fire Control Tables, 1918. C.B. 1456. Copy No. 10 at Admiralty Library, Portsmouth, United Kingdom.
  • Admiralty, Technical History Section (1919). The Technical History and Index: Fire Control in H.M. Ships. Vol. 3, Part 23. C.B. 1515 (23) now O.U. 6171/14. At The National Archives. ADM 275/19.
  • Norman Friedman. The Chester Class Cruisers in Warship Issue 17.



Birkenhead Class Light Cruiser
  Birkenhead Chester  
<– Calliope Class Minor Cruisers (UK) Cambrian Class –>



Retrieved from "http://dreadnoughtproject.org/tfs/index.php?title=Birkenhead_Class_Cruiser_(1915)&oldid=64791"