Difference between revisions of "Effective Firing"
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'''Effective Firing''' was what the Royal Navy called a firing (or number of firings) that would effect a level of wear on the [[Bore|bore]] of a gun equivalent to a single [[Firing Charge|full charge firing]]. | '''Effective Firing''' was what the Royal Navy called a firing (or number of firings) that would effect a level of wear on the [[Bore|bore]] of a gun equivalent to a single [[Firing Charge|full charge firing]]. | ||
| − | Reduced charge firings (e.g., 2/3 charge) had a correspondingly lower effective charge rating than when a full charge was employed. The relationship was less than linear — a 2/3 charge would reduce wear by more than one third<ref> | + | Reduced charge firings (e.g., 2/3 charge) had a correspondingly lower effective charge rating than when a full charge was employed. The relationship was less than linear — a 2/3 charge would reduce wear by more than one third.<ref>Email from John Roberts to Tone.</ref> |
The [[Gun Captain|gun captain]](?) for a weapon would be responsible for counting the number of firings recorded by the gun as well as the type of charge used. This would be converted into an equivalent number of effective firings, and a resultant loss in [[Muzzle Velocity|muzzle velocity]] for the gun calculated from the [[Range Table|range table]] data. As time permitted, corrective adjustments might be taken to bring the gun back closer to range table performance when provided nominal ranges. Examples of such adjustments might be to exchange a [[Dip Strip]] on an [[Elevation Receiver|elevation receiver]] to correct the gun when in director fire, or to alter any [[Ballistic Coefficient|ballistic coefficient]] features available on the [[Sightsetting Equipment|gun sight]] for local laying. | The [[Gun Captain|gun captain]](?) for a weapon would be responsible for counting the number of firings recorded by the gun as well as the type of charge used. This would be converted into an equivalent number of effective firings, and a resultant loss in [[Muzzle Velocity|muzzle velocity]] for the gun calculated from the [[Range Table|range table]] data. As time permitted, corrective adjustments might be taken to bring the gun back closer to range table performance when provided nominal ranges. Examples of such adjustments might be to exchange a [[Dip Strip]] on an [[Elevation Receiver|elevation receiver]] to correct the gun when in director fire, or to alter any [[Ballistic Coefficient|ballistic coefficient]] features available on the [[Sightsetting Equipment|gun sight]] for local laying. | ||
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==Footnotes== | ==Footnotes== | ||
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==Bibliography== | ==Bibliography== | ||
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| − | *{{ | + | *{{UKRangeTables1918I}} |
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[[Category:Fire Control]] | [[Category:Fire Control]] | ||
Latest revision as of 20:14, 14 September 2012
Effective Firing was what the Royal Navy called a firing (or number of firings) that would effect a level of wear on the bore of a gun equivalent to a single full charge firing.
Reduced charge firings (e.g., 2/3 charge) had a correspondingly lower effective charge rating than when a full charge was employed. The relationship was less than linear — a 2/3 charge would reduce wear by more than one third.[1]
The gun captain(?) for a weapon would be responsible for counting the number of firings recorded by the gun as well as the type of charge used. This would be converted into an equivalent number of effective firings, and a resultant loss in muzzle velocity for the gun calculated from the range table data. As time permitted, corrective adjustments might be taken to bring the gun back closer to range table performance when provided nominal ranges. Examples of such adjustments might be to exchange a Dip Strip on an elevation receiver to correct the gun when in director fire, or to alter any ballistic coefficient features available on the gun sight for local laying.
See Also
Footnotes
- ↑ Email from John Roberts to Tone.
Bibliography
- Admiralty, Gunnery Branch. C.B. 1245. Range Tables for His Majesty's Fleet. Volume I. 1918. (9.2-inch Guns and Above.). Pub. No. OU 6089 (late CB 1245), Vol. 1 The National Archives. ADM 186/236.
