Duncan Class Battleship (1901): Difference between revisions
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* Rate (B. & S. Mark II): 4 transmitters, 8 receivers | * Rate (B. & S. Mark II): 4 transmitters, 8 receivers | ||
* Deflection (Vickers): 6 transmitters (12 in ''Exmouth''), 26 receivers (30 in ''Exmouth'') | * Deflection (Vickers): 6 transmitters (12 in ''Exmouth''), 26 receivers (30 in ''Exmouth'') | ||
Additionally, this class had the following Siemens fire control equipment:<ref>''Handbook for Fire Control Instruments, 1909'', p. 59.</ref> | |||
* Group Switches: 3 (converted by Chatham) | * Group Switches: 3 (converted by Chatham) | ||
* Turret fire gongs: 8 with 2 keys | * Turret fire gongs: 8 with 2 keys | ||
* Fire Gongs: 12 (76 in ''Exmouth'') with 4 keys | * Fire Gongs: 12 (76 in ''Exmouth'') with 4 keys | ||
Revision as of 21:54, 19 September 2009
Fire Control
The general system of wiring between the TSs in ships prior to Lord Nelson class is illustrated in Handbook for Fire Control Instruments, 1914.[1]
The equipment in Montagu is open to conjecture owing to her loss in 1906.
Rangefinders
Evershed Bearing Indicators
It is not known if this equipment was ever provided.
Directors
These ships never received directors for main or secondary batteries.[2]
Gunnery Control
The ship's guns were organized in 3 groups:[3]
- Two 12-in turrets
- Starboard 6-in guns ('A' & 'X')
- Port 6-in guns ('B' & 'Y')
Local Control in Turrets
There was no provision in these ships for local turret control wherein the receivers in the turret could be driven by transmitters in the officer's position at the back of the turret.[4]
Transmitting Stations
These ships had fore and aft TSes.[5]
A C.O.S. allowed control options of
- Fore
- After
- Separate
Each control group had transmitters (of various type, see Shipwide Network) with a pair of receivers, one wired directly to the transmitter as a tell-tale, and the other fed off the wires going to the distant guns (i.e., the aft guns for the fore TS and vice-versa) as a repeat. "These repeat receivers are necessary to keep the idle transmitters in step; when changing back from separate control they are required to enable both halves of the group to be set alike before being paralleled on to one transmitter."[6]
Dreyer Table
These ships never received Dreyer tables.[7]
Shipwide Network
By late 1914, these ships were equipped with range, orders and deflection circuits, with those in Albemarle, Cornwallis and Duncan being Vickers, Son and Maxim with Barr and Stroud rate instruments and those in Exmouth and Russell being Barr and Stroud Mark II for range and rate, Mark I for orders, and Vickers for deflection.[8][9]
Although, possibly just generally true due to the variations described above, the Handbook for Fire Control Instruments, 1909 lists the equipment on this class as:[10]
- Range (B. & S. Mark II): 6 transmitters (12 in Exmouth), 32 receivers
- Orders (B. & S. Mark I): 6 transmitters (12 in Exmouth), 22 receivers
- Rate (B. & S. Mark II): 4 transmitters, 8 receivers
- Deflection (Vickers): 6 transmitters (12 in Exmouth), 26 receivers (30 in Exmouth)
Additionally, this class had the following Siemens fire control equipment:[11]
- Group Switches: 3 (converted by Chatham)
- Turret fire gongs: 8 with 2 keys
- Fire Gongs: 12 (76 in Exmouth) with 4 keys
- Captain's Cease Fire Bells: 18 with 1 key
These ships lacked Target Visible and Gun Ready signals.[12]
Torpedo Control
See Also
Footnotes
- ↑ Handbook for Fire Control Instruments, 1914, p. 50 & Plates 50 and 54(I).
- ↑ Director Firing Handbook, 1917, pp. 142-3.
- ↑ Handbook for Fire Control Instruments, 1914, p. 8.
- ↑ Handbook for Fire Control Instruments, 1914, p. 50.
- ↑ Handbook for Fire Control Instruments, 1914, p. 50 & Plates 50 and 54(I).
- ↑ Handbook for Fire Control Instruments, 1914, pp. 50-1.
- ↑ Handbook of Capt. F.C. Dreyer's Fire Control Tables, p. 3.
- ↑ Handbook for Fire Control Instruments, 1914, p. 72.
- ↑ Handbook for Fire Control Instruments, 1909, pp. 56-7, 59.
- ↑ Handbook for Fire Control Instruments, 1909, p. 59.
- ↑ Handbook for Fire Control Instruments, 1909, p. 59.
- ↑ Handbook for Fire Control Instruments, 1914, p. 11.
Bibliography
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 (1914). Handbook for Fire Control Instruments, 1914. G. 01627/14. C.B. 1030. Copy 1235 at The National Archives. ADM 186/191. Template:BibUKDirectorFiringHandbook1917 Template:BibUKDreyerTableHandbook1918
