Difference between revisions of "Elevation Receiver"
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===British=== | ===British=== | ||
| − | British elevation receivers were provided indication of the desired elevation angle | + | British elevation receivers were provided indication of the desired elevation angle quantized in steps of 1.5 arc minutes<ref>''Director Firing Handbook, 1917'', p. 151.</ref> which was corrected for: |
| − | * [[ | + | * [[Tilt]] to negate imperfection in the mounting's vertical installation. |
* [[Dip]] (differences in mounting height relative to the ship's datum point). | * [[Dip]] (differences in mounting height relative to the ship's datum point). | ||
* The [[Muzzle Velocity|muzzle velocity]] in the particular gun, subject to its accumulated number of [[Effective Firing|firings]]. | * The [[Muzzle Velocity|muzzle velocity]] in the particular gun, subject to its accumulated number of [[Effective Firing|firings]]. | ||
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The British Director Firing Handbook from 1917 documents the following types: | The British Director Firing Handbook from 1917 documents the following types: | ||
| − | * Turret Type (used in the capital ships) | + | * [[Turret Type Elevation Receiver|Turret Type]] (used in the capital ships) |
| − | * 6-in P. VIII Type (this one had just a single red and a single black pointer) | + | * [[6-in P. VIII Type Elevation Receiver|6-in P. VIII Type]] (this one had just a single red and a single black pointer) |
| − | * 6-in P. VII Type | + | * [[6-in P. VII Type Elevation Receiver|6-in P. VII Type]] |
| − | + | * [[6-in P. XIII Type Elevation Receiver|6-in P. XIII Type]] | |
| − | * 6-in P. XIII Type | + | * [[4-in Triple Type Elevation Receiver|4-in Triple Type]] |
| − | The director system used in destroyers and flotilla leaders did not transmit elevation to the guns at all, instead relying on a system by which gunlayers kept their sighting scopes level so the director could fire [[ | + | The director system used in destroyers and flotilla leaders did not transmit elevation to the guns at all, instead relying on a system by which gunlayers kept their sighting scopes level so the director could fire [[Firing on the Roll|on the roll]]. This system meant that the small ships lacked elevation receivers.<ref>''Director Firing for Destroyers and Flotilla Leaders''</ref> |
| + | |||
| + | An Admiralty Order of late 1913 asks all British ships with turret {{FTP}} gear (except {{UK-PrincessRoyal}}) to report how often they've had to replace cabling to their receivers and whether they'd like to switch to having a junction box near the equipment so that the length of cables to the receivers that might wear out under motion could be reduced to simplify its replacement.{{AWO1913|653 of 21 Nov 1913}} | ||
===German=== | ===German=== | ||
| Line 28: | Line 30: | ||
==See Also== | ==See Also== | ||
| + | {{refbegin}} | ||
*[[Elevation Transmitter]] | *[[Elevation Transmitter]] | ||
*[[Training Receiver]] | *[[Training Receiver]] | ||
| + | {{refend}} | ||
==Footnotes== | ==Footnotes== | ||
| − | + | {{reflist}} | |
| − | + | ||
| − | + | ||
==Bibliography== | ==Bibliography== | ||
| − | + | {{refbegin}} | |
| − | *{{ | + | *{{DirectorH}} |
| − | *{{ | + | *{{UKDirectorFiringDestroyers1918}} |
| − | *{{ | + | *{{UKGunneryPocketBook1945}} |
| − | + | {{refend}} | |
[[Category:Fire Control]] | [[Category:Fire Control]] | ||
[[Category:Shipboard Equipment]] | [[Category:Shipboard Equipment]] | ||
Latest revision as of 08:41, 9 July 2021
An Elevation Receiver is a F.T.P. instrument mounted near a gunlayer position which receives and indicates (usually by 2 red pointers for degrees and minutes) an angle of elevation transmitted by a director. The gunlayer works his controls to elevate the gun and bring the black pointers into alignment with the red.
An elevation receiver was required near each gun which would be fired under control of a director which controlled elevation (German directors did not). Similarly, each trainable mounting required a training receiver to guide its trainer in matching the director.
Various Examples
British
British elevation receivers were provided indication of the desired elevation angle quantized in steps of 1.5 arc minutes[1] which was corrected for:
- Tilt to negate imperfection in the mounting's vertical installation.
- Dip (differences in mounting height relative to the ship's datum point).
- The muzzle velocity in the particular gun, subject to its accumulated number of firings.
- Use of alternate projectiles or reduced charges.
The British Director Firing Handbook from 1917 documents the following types:
- Turret Type (used in the capital ships)
- 6-in P. VIII Type (this one had just a single red and a single black pointer)
- 6-in P. VII Type
- 6-in P. XIII Type
- 4-in Triple Type
The director system used in destroyers and flotilla leaders did not transmit elevation to the guns at all, instead relying on a system by which gunlayers kept their sighting scopes level so the director could fire on the roll. This system meant that the small ships lacked elevation receivers.[2]
An Admiralty Order of late 1913 asks all British ships with turret F.T.P. gear (except Princess Royal) to report how often they've had to replace cabling to their receivers and whether they'd like to switch to having a junction box near the equipment so that the length of cables to the receivers that might wear out under motion could be reduced to simplify its replacement.[3]
German
The German director system did not transmit elevation to the guns; the guns were locally laid and fired even under director control. Consequently, there was likely no such thing as a German elevation receiver in active service.
See Also
Footnotes
- ↑ Director Firing Handbook, 1917, p. 151.
- ↑ Director Firing for Destroyers and Flotilla Leaders
- ↑ Admiralty Weekly Order No. 653 of 21 Nov 1913.
Bibliography
- 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 (1918). Director Firing For Flotilla Leaders and Destroyers. Pub. No. B.R. 934 (late O.U. 6127 and C.B. 1461 and 1461(A). The National Archives. ADM 186/234.
- Admiralty, Gunnery Branch (1945). The Gunnery Pocket Book. B.R. 224/45. The National Archives. ADM 234/545.
