Minotaur Class Cruiser (1906): Difference between revisions

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The three [[Armoured Cruiser|armoured cruisers]] of the '''Minotaur Class''' were completed in 1908 and 1909.
The three [[Armoured Cruiser|armoured cruisers]] of the '''''Minotaur'' Class''' were completed in 1908 and 1909.
{| border="2" cellpadding="2" cellspacing="0" style="margin: 0 0 1em 0.5em; background: #f9f9f9; border: 1px #aaa solid; border-collapse: collapse;" align="center"; width=100%
 
<div name=fredbot:ships>
{| class="wikitable collapsible" border=2 cellpadding=2 cellspacing=0 style="margin: 0 0 1em 0.5em; background: #f9f9f9; border: 1px #aaa solid; border-collapse: collapse;" align=center;
|-
! colspan=6 align=left|Overview of 3 vessels
|-
| colspan=6 align=left|<small>Citations for this data available on individual ship pages</small>
|-
|-
! width=10%; align= center rowspan=2 | Name  
! align=center | Name  
! width=10%; align= center rowspan=2 | Builder  
! align=center | Builder  
! width=11%; align= center rowspan=2 | Laid Down  
! align=center | Laid Down  
! width=11%; align= center rowspan=2 | Launched  
! align=center | Launched  
! width=11%; align= center rowspan=2 | Commissioned
! align=center | Completed
! width=32%; align= center colspan=4 | Pendant Numbers
! align=center | Fate
! width=14%; align= center rowspan=2 | Fate
|- align=left
|- valign="top"
| {{Template:UK-Defence}}
| width=8%; align= center | 1914
|[[Pembroke Royal Dockyard]]
| width=8%; align= center | January, 1918
|22 Feb, 1905
| width=8%; align= center | April, 1918
|24 Apr, 1907
| width=8%; align= center | June, 1918
|9 Feb, 1909
|- valign="top"
|Sunk 5 Jul, 1918
| [[H.M.S. Defence (1907)|''Defence'']] || Pembroke || 22 Feb., 1905 || 24 April, 1907 || 9 Feb., 1909 || 05 || || || || Sunk, 31 May, 1916
|- align=left
|- valign="top"
| {{Template:UK-Minotaur}}
| [[H.M.S. Minotaur (1906)|''Minotaur'']] || Devonport || 2 Jan., 1905 || 6 June, 1906 || 1 April, 1908 || 91 <small>(Feb., 1915)</small> || 87 || 71 || N.73 || Sold, 12 April, 1920
|[[Devonport Royal Dockyard]]
|- valign="top"
|2 Jan, 1905
| [[H.M.S. Shannon (1906)|''Shannon'']] || Chatham || 2 Jan., 1905 || 20 Sept., 1906 || 19 March, 1908 || 92 || 8A || 74 || N.25 || Sold, 12 December, 1922
|6 Jun, 1906
|1 Apr, 1908
|Sold 12 Apr, 1920
|- align=left
| {{Template:UK-Shannon}}
|[[Chatham Royal Dockyard]]
|2 Jan, 1905
|20 Sep, 1906
|10 Mar, 1908
|Sold 12 Dec, 1922
|}
|}
 
</div name=fredbot:ships>
==Design and Construction==
==Design and Construction==
A fourth member of the class, ''Orion'', was sacrificed from the 1904-1905 estimates along with a third [[Lord Nelson Class Battleship (1906)|''Lord Nelson'' battleship]] after the purchase of the two [[Triumph Class Battleship (1903)|''Triumph'' class battleships]] from Chile.<ref>McBride.  "Lord Nelson and Agamemnon."  p. 71.</ref>  
A fourth member of the class, ''Orion'', was sacrificed from the 1904-1905 estimates along with a third [[Lord Nelson Class Battleship (1906)|''Lord Nelson'' battleship]] after the purchase of the two [[Triumph Class Battleship (1903)|''Triumph'' class battleships]] from Chile.<ref>McBride.  "Lord Nelson and Agamemnon."  p. 71.</ref>  


==Armament==
==Armament==
In early 1913, new pattern G. 329 trainer's telescopes of 2.5 power and 20 degree field were issued to these and many other capital ships, to replace the 5/12, 5/15 and 5/21 variable power G.S. telescopes that had previously been in use.<ref>Admiralty Weekly Orders.  28 Feb, 1913.  {{TNA|ADM 182/4}}.</ref>


===Main Battery===
===Main Battery===
This section is sourced in ''The Sight Manual, 1916''.<ref>''The Sight Manual, 1916'', pp. 53, 105, 108, 110.</ref>
This section is sourced in ''The Sight Manual, 1916''.{{TheSightM|pp. 53, 105, 108, 110}}


The four 9.2-in guns Mark XI were arranged in two double Mark VII mountings fore and aft, able to elevate 15 degrees and depress 5 degrees.
The four 9.2-in guns Mark XI were arranged in two double Mark VII mountings fore and aft, able to elevate 15 degrees and depress 5 degrees.
Line 39: Line 55:


===Secondary Battery===
===Secondary Battery===
This section is sourced in ''The Sight Manual, 1916''.<ref>''The Sight Manual, 1916'', pp 58, 105, 108, 110.</ref>
This section is sourced in ''The Sight Manual, 1916''.{{TheSightM|pp 58, 105, 108, 110}}


The ten 7.5-in BL guns Mark II were arranged in five single Mark II mountings on each broadside, able to elevate 15 degrees and depress 5 degrees.  They could fire 2 CRH or 4 CRH shells.
The ten 7.5-in B.L. guns Mark II were arranged in five single Mark II mountings on each broadside, able to elevate 15 degrees and depress 5 degrees.  They could fire 2 CRH or 4 CRH shells.


The sights (also used in [[Warrior Class Cruiser (1905)|''Warrior'' class]]) were gear-worked with a range gearing constant of 49.28, graduated to 15 degrees (15,700 yards for 4 CRH, 14,200 for 2 CRH).  Range dials were provided for full charge at 2800 fps, reduced charge at 2325 fps and 3-pdr sub-calibre and .303-in aiming rifle.  MV was corrected by adjustable pointer to +/- 75 fps.   
The sights (also used in [[Warrior Class Cruiser (1905)|''Warrior'' class]]) were gear-worked with a range gearing constant of 49.28, graduated to 15 degrees (15,700 yards for 4 CRH, 14,200 for 2 CRH).  Range dials were provided for full charge at 2800 fps, reduced charge at 2325 fps and 3-pdr sub-calibre and .303-in aiming rifle.  MV was corrected by adjustable pointer to +/- 75 fps.   
Line 52: Line 68:


===Other Guns===
===Other Guns===
High velocity 12-pdr 18 cwt guns were mounted on P IV* mountings, similar to those in the [[Lord Nelson Class Battleship (1906)|''Lord Nelson'']], [[King Edward VII Class Battleship (1903)|''King Edward VII'']] and {{UK-Dreadnought}} classes.<ref>''The Sight Manual, 1916'', p. 94, 108, Plate 47.</ref>
High velocity 12-pdr 18 cwt guns were mounted on P. IV* mountings, similar to those in the [[Lord Nelson Class Battleship (1906)|''Lord Nelson'']], [[King Edward VII Class Battleship (1903)|''King Edward VII'']] and {{UK-Dreadnought}} classes.{{TheSightM|p. 94, 108, Plate 47}}


The mounting could elevate to 20 degrees and depress to 10 degrees, but though its sight could match the 20 degree elevation, the range dial was only graduated to 14.5 degrees (7,900 yards).  This was fine, as there was limited fire control support provided for them and the weapons proved to have little effectiveness at the ranges where torpedo attack became deeply worrying.
The mounting could elevate to 20 degrees and depress to 10 degrees, but though its sight could match the 20 degree elevation, the range dial was only graduated to 14.5 degrees (7,900 yards).  This was fine, as there was limited fire control support provided for them and the weapons proved to have little effectiveness at the ranges where torpedo attack became deeply worrying.
Line 65: Line 81:


===Torpedoes===
===Torpedoes===
In 1913, it was approved, as part of a general reallocation of 18-in torpedoes, to replace the torpedoes on [[Minotaur Class Cruiser (1906)|''Minotaur'' class]] (except ''Shannon'', which received F. III** H. torpedoes), [[Duke of Edinburgh Class Cruiser (1904)|''Duke of Edinburgh'']] and [[Bristol Class Cruiser (1909)|''Bristol'' classes]] with F III**  torpedoes.<ref>''Annual Report of the Torpedo School, 1913'', p. 8.</ref>
The ships had five submerged 18-in torpedo tubes:{{UKTorpM1909III|p. 265}}
* two on broadside forward, depressed three degrees and bearing abeam;  axis of tube was 7 foot 5.75 inches below load water line and 1 feet 6 inches above deck.
* two on broadside aft, depressed three degrees and bearing abeam;  axis of tube was 7 foot 5.75 inches below load water line and 1 feet 6 inches above deck.
* one at the stern, undepressed and with the axis of tube was 3 feet below load water line and 2 foot 7 inches above the deck
 
In 1909, as heater torpedo supplies were still growing, these ships were to receive two [[18-in Fiume Mark III** H. Torpedo]]es each.{{ARTS1909|p. 14}}
 
In 1913, it was approved, as part of a general reallocation of 18-in torpedoes, to replace the torpedoes on [[Minotaur Class Cruiser (1906)|''Minotaur'' class]] (except ''Shannon'', which received [[18-in Fiume Mark III** H. Torpedo]]es), [[Duke of Edinburgh Class Cruiser (1904)|''Duke of Edinburgh'']] and [[Bristol Class Cruiser (1909)|''Bristol'' classes]] with Fiume Mark III**  torpedoes.{{ARTS1913|p. 8}}
 
In early 1914, the ships had four [[Torpedo Director Pattern 2006]]s and were to have them exchanged for -A models which supported gyro angling.{{AWO1914|1019 of 17 Apr, 1914}}


==Fire Control==
==Fire Control==
[[File:ARTS1907Plate17.jpg|thumb|400px|'''Fire Control Circuits'''<ref>''Annual Report of the Torpedo School, 1907'', Plate 17.</ref> ]]
[[File:ARTS1907Plate17.jpg|thumb|400px|'''Fire Control Circuits'''{{ARTS1907|Plate 17}} ]]


===Rangefinders===
===Rangefinders===


===Directors===
===Directors===
In 1916, it was approved that the ships of this class should be retrofitted with directors as time, resources and opportunity permitted.<ref>''Annual Report of the Torpedo School, 1916'', p. 175.</ref>
In 1916, it was approved that the ships of this class should be retrofitted with directors as time, resources and opportunity permitted.{{ARTS1916|p. 175}}


Plans to outfit these ships with directors started in early 1915 but were slow to execute.  ''Defence'' was lost before receiving hers, and the other ''Minotaur'' and ''Shannon'' received theirs in August and October 1918, respectively.<ref>''The Technical History and Index: Fire Control in HM Ships, 1919'', p. 15.</ref>
Plans to outfit these ships with directors started in early 1915 but were slow to execute.  {{UK-Defence}} was lost before receiving hers, but in May 1915 her torpedo officer [[Hugh Cecil Robert Feilding]] and {{SubRN}} [[John Scott Dove]] were thanked by the Admiralty along with other officers for creating an extempore installation in the ship.  The other vessels, {{UK-Minotaur}} and {{UK-Shannon}} received their proper equipment in August and October 1918, respectively.{{FCHMShips|p. 15}}


====Main Battery====
The [[Elevation Receiver]]s for the 9.2-in and the 7.5-in batteries were 4-in Triple Type with mechanical tilt correctors, Pattern H. 13.  They could indicate elevations up to 15 degrees.  The [[Small Type Training Receivers]] were pattern number 20 in "A" turret and S1 to S3 and P1 to P3, whereas "Y" turret and S4 and S5 and P4 and P5 had pattern number 21.{{DirectorH|pp. 145, 146}}
 
====Secondary Battery====
 
===Torpedo Control===


===Transmitting Stations===
===Transmitting Stations===
There were two, as one is called the fore T.S. in a 1915 source and the image above clearly can only pertain to this class.<ref>''Annual Report of the Torpedo School, 1915'', p. 219.</ref><ref>''Annual Report of the Torpedo School, 1907'', Plate 17.</ref>
There were two, as one is called the fore {{TS}} in a 1915 source and the image above clearly can only pertain to this class.{{ARTS1915|p. 219}}{{ARTS1907|Plate 17}}


===Dreyer Table===
===Dreyer Table===
These ships had no Dreyer table.<ref>absent from table in ''Handbook of Capt. F.C. Dreyer's Fire Control Tables'', p. 3.</ref>
These ships had no Dreyer table.{{DreyerH|p. 3}}


===Fire Control Instruments===
===Fire Control Instruments===
The ships in this class primarily used [[Barr and Stroud Mark II Fire Control Instruments]].
The ships in this class primarily used [[Barr and Stroud Mark II Fire Control Instruments]].


The ''Handbook for Fire Control Instruments, 1909'' lists their equipment as:<ref>''Handbook for Fire Control Instruments, 1909'', p. 58.</ref>
The ''Handbook for Fire Control Instruments, 1909'' lists their equipment as:{{HFCI1909|p. 58}}
* Combined Range, Order, Deflection:  8 transmitters, 40 receivers
* Combined Range, Order, Deflection:  8 transmitters, 40 receivers
* Group Switches: 4
* Group Switches: 4
Line 98: Line 119:
* Bearing: none
* Bearing: none
* Range: none
* Range: none
Additionally, this class had the following Siemens fire control equipment:<ref>''Handbook for Fire Control Instruments, 1909'', p. 58.</ref>
Additionally, this class had the following Siemens fire control equipment:{{HFCI1909|p. 58}}
* Turret fire gongs: 26  with 8 keys
* Turret fire gongs: 26  with 8 keys
* Fire Gongs: 8 with 2 keys
* Fire Gongs: 8 with 2 keys
* Captain's Cease Fire Bells:  16 with 1 key
* Captain's Cease Fire Bells:  16 with 1 key


By 1915, however, some [[Barr and Stroud Fire Control Instruments|Barr and Stroud]] bearing instruments had been installed.<ref>''Annual Report of the Torpedo School, 1915'', p. 219.</ref>
By 1915, however, some [[Barr and Stroud Fire Control Instruments|Barr and Stroud]] bearing instruments had been installed.{{ARTS1915|p. 219}}


The 9.2-in turrets each had 2 bearing receivers that could be driven by a transmitter in the fore T.S. or by one of two special master transmitters mounted port and starboard in the foretop.  A C.O.S. in the fore T.S. selected whether the 9.2-in group was driven by the transmitter in the fore T.S. or by one of the masters in the foretop.  The fore T.S. had 3 repeat receivers wired off the 9.2-in and both 7.5-in groups to facilitate in changing over.  The 7.5-in guns each had a single receiver, and the "special bearing transmitters" in the foretop also had a repeat receiver for their group.  The overall bill of fare ran to:
The 9.2-in turrets each had 2 bearing receivers that could be driven by a transmitter in the fore T.S. or by one of two special master transmitters mounted port and starboard in the foretop.  A C.O.S. in the fore T.S. selected whether the 9.2-in group was driven by the transmitter in the fore T.S. or by one of the masters in the foretop.  The fore T.S. had 3 repeat receivers wired off the 9.2-in and both 7.5-in groups to facilitate in changing over.  The 7.5-in guns each had a single receiver, and the "special bearing transmitters" in the foretop also had a repeat receiver for their group.  The overall bill of fare ran to:
Line 116: Line 137:
It is not clear to me why "special" bearing transmitters were required, and how these were made compatible with the B&S receivers.
It is not clear to me why "special" bearing transmitters were required, and how these were made compatible with the B&S receivers.


None of the ships had ''Target Visible'' or ''Gun Ready'' signals.<ref>''Handbook for Fire Control Instruments, 1914'', p. 11.</ref>
None of the ships had ''Target Visible'' or ''Gun Ready'' signals.{{HFCI1914|p. 11}}
 
==Flash Precautions==
In early 1915 ships were called upon to report on what extemporary steps were considered necessary to prevent the ignition of charges in casemates, batteries and ammunition passages.  The report from ''Defence'' read in part:
 
<blockquote>In this ship the comparative safety of the passages makes the danger less than in many other cases, and with the number of guns to be supplied it is better to accept some risk rather than reduce the rate of fire supply, which anything of real use in this line must do.<ref>''Storage and Handling of Explosives in Warships''.  pp. 6, 8.</ref></blockquote>


==See Also==
==See Also==
Line 126: Line 152:
==Bibliography==
==Bibliography==
{{refbegin}}
{{refbegin}}
*{{BibFriedmanBritishCruisersVictorian}}
*{{FriedmanBritishCruisersVictorian}}
*{{ARTS1915}}
*{{ARTS1915}}
*{{BibConways1906-1921}}
*{{Conways1906}}
*{{HFCI1909}}
*{{HFCI1909}}
*{{HFCI1914}}
*{{HFCI1914}}
*{{DreyerTableHandbook1918}}
*{{DreyerH}}
*{{FireControlInHMShips1919}}
*{{FCHMShips}}
* R A Burt.  ''Minotaur: Before the Battlecruiser'' in [[Warship (Journal)|Warship]], Volume XI Issue 42.
* R A Burt.  ''Minotaur: Before the Battlecruiser'' in [[Warship (Journal)|Warship]], Volume XI Issue 42.
{{refend}}
{{refend}}


 
{{Footer Minotaur Class Cruiser (1906)}}
{{Minotaur Class (1906)}}


{{DEFAULTSORT:Minotaur}}
{{DEFAULTSORT:Minotaur}}
Line 154: Line 179:
{ship
{ship
name=Defence
name=Defence
pend=<ref>Dittmar; Colledge.  ''British Warships: 1914-1919''.  p. 44.</ref>
pend=05 (1914){{DittColl|p. 44}}
builder=
builder=[[Pembroke Royal Dockyard]]{{DittColl|p. 44}}
order=
order=1904-05 Programme{{Conways1860|p. 73}}
laid=
laid=22 2 05{{Conways1860|p. 73}}
launch=1907
launch=24 4 1907{{DittColl|p. 44}}
comm=9 Feb, 1909
comm=9 Feb, 1909{{Conways1860|p. 73}}
fate=
fate=Sunk
fate2=Lost at Jutland
fate2=at [[Battle of Jutland]]
fatedate=
fatedate=5 31 16{{DittColl|p. 44}}
}
}


{ship
{ship
name=Minotaur
name=Minotaur
pend=91 (Feb 1915)<br>87 (Jan 1918)<br>71 (Apr 1918)<br>N.73 (Jun 1918)<ref>Dittmar; Colledge.  ''British Warships: 1914-1919''.  p. 44.</ref>
pend=91 (Feb 1915)<br>87 (Jan 1918)<br>71 (Apr 1918)<br>N.73 (Jun 1918){{DittColl|p. 44}}
builder=[[Chatham Royal Dockyard]]
builder=[[Devonport Royal Dockyard]]{{DittColl|p. 44}}
order=
order="
laid=
laid=2 1 05{{Conways1860|p. 73}}
launch=1906
launch=6 6 1906{{DittColl|p. 44}}
comm=
comm=1 4 08{{Conways1860|p. 73}}
fate=
fate=Sold
fate2=Scrapped
fate2=Scrapped
fatedate=
fatedate=12 4 20{{DittColl|p. 44}}
}
}


{ship
{ship
name=Shannon
name=Shannon
pend=92 (1914)<br>8A (Jan 1918)<br>74 (Apr 1918)<br>N.25 (Jun 1918)<ref>Dittmar; Colledge.  ''British Warships: 1914-1919''.  p. 44.</ref>
pend=92 (1914)<br>8A (Jan 1918)<br>74 (Apr 1918)<br>N.25 (Jun 1918){{DittColl|p. 44}}
builder=[[Chatham Royal Dockyard]]
builder=[[Chatham Royal Dockyard]]{{DittColl|p. 44}}
order=
order="
laid=
laid=2 1 05{{Conways1860|p. 73}}
launch=1906
launch=20 9 1906{{DittColl|p. 44}}
comm=10 Mar, 1908
comm=10 Mar, 1908{{Conways1860|p. 73}}
fate=
fate=Sold
fate2=Scrapped
fate2=Scrapped
fatedate=
fatedate=12 12 22{{DittColl|p. 44}}
}
}


Line 194: Line 219:


data -->
data -->
[[Category:Featured Ship Classes]]

Latest revision as of 18:12, 27 February 2022

The three armoured cruisers of the Minotaur Class were completed in 1908 and 1909.

Overview of 3 vessels
Citations for this data available on individual ship pages
Name Builder Laid Down Launched Completed Fate
Defence Pembroke Royal Dockyard 22 Feb, 1905 24 Apr, 1907 9 Feb, 1909 Sunk 5 Jul, 1918
Minotaur Devonport Royal Dockyard 2 Jan, 1905 6 Jun, 1906 1 Apr, 1908 Sold 12 Apr, 1920
Shannon Chatham Royal Dockyard 2 Jan, 1905 20 Sep, 1906 10 Mar, 1908 Sold 12 Dec, 1922

Design and Construction

A fourth member of the class, Orion, was sacrificed from the 1904-1905 estimates along with a third Lord Nelson battleship after the purchase of the two Triumph class battleships from Chile.[1]

Armament

In early 1913, new pattern G. 329 trainer's telescopes of 2.5 power and 20 degree field were issued to these and many other capital ships, to replace the 5/12, 5/15 and 5/21 variable power G.S. telescopes that had previously been in use.[2]

Main Battery

This section is sourced in The Sight Manual, 1916.[3]

The four 9.2-in guns Mark XI were arranged in two double Mark VII mountings fore and aft, able to elevate 15 degrees and depress 5 degrees.

The sights (also used in Lord Nelson class) were gear-worked with a range gearing constant of 32, graduated to 15 degrees (likely 16,300 yards for 2 CRH projectiles).[4] Range dials were provided for full charge at 2825 fps, reduced charge at 2425 fps, another at 2300 fps (possibly only for Minotaur, but likely for all) and 3-pdr sub-calibre and .303-in aiming rifle. MV was corrected by adjustable pointer to +/- 75 fps. The deflection was on a gearing constant of 82.66, 1 knot being 2.49 arc minutes, calibrated for 2875 fps at 5000 yards.

Drift was corrected by inclining the sight carrier 1.5 degrees. The side sighting position with sight lines 32.65 inches above the bore and 32 inches abreast whereas the central position was 38 inches abreast the bore.

A "C" corrector was fitted, presumably also a temperature corrector.

Secondary Battery

This section is sourced in The Sight Manual, 1916.[5]

The ten 7.5-in B.L. guns Mark II were arranged in five single Mark II mountings on each broadside, able to elevate 15 degrees and depress 5 degrees. They could fire 2 CRH or 4 CRH shells.

The sights (also used in Warrior class) were gear-worked with a range gearing constant of 49.28, graduated to 15 degrees (15,700 yards for 4 CRH, 14,200 for 2 CRH). Range dials were provided for full charge at 2800 fps, reduced charge at 2325 fps and 3-pdr sub-calibre and .303-in aiming rifle. MV was corrected by adjustable pointer to +/- 75 fps.

The deflection was on a gearing constant of 72.65, 1 knot being 2.70 arc minutes, calibrated for 2800 fps at 5000 yards. An arrow at 4.5 knots right deflection on the deflection dial was inscribed "Zero for sight testing".

Drift was corrected by inclining the sight carrier 2 degrees and by applying an additional 4.5 knots permanent left deflection when firing 4 CRH shells. The sighting lines with sight lines 11 inches above the bore and 32 inches abreast whereas the central position was 38 inches abreast the bore.A practice gun could be mounted ont he turret roof 65.12 inches above the gun bore.

A "C" corrector was fitted, presumably also a temperature corrector.

Other Guns

High velocity 12-pdr 18 cwt guns were mounted on P. IV* mountings, similar to those in the Lord Nelson, King Edward VII and Dreadnought classes.[6]

The mounting could elevate to 20 degrees and depress to 10 degrees, but though its sight could match the 20 degree elevation, the range dial was only graduated to 14.5 degrees (7,900 yards). This was fine, as there was limited fire control support provided for them and the weapons proved to have little effectiveness at the ranges where torpedo attack became deeply worrying.

The gear-worked sights were similar to the P IV type, but added a cross-connected trainer's sight. They had a range gearing contant of 54 and range dials for 2550 fps, 1962 fps, and 1-in and .303-in aiming rifles. The first series produced corrected for MV with detachable cams for 2600, 2575, 2550, 2525 and 2500 fps. The second series replaced these with an adjustable pointer for +/- 50 fps.

The deflection gearing constant was 63.38 with 1 knot equal to 2.96 arc minutes, corresponding to 2600 fps at 2000 yards. Drift was corrected by inclining the sight carrier arm 2 degrees.

The layer's and trainer's sight lines were 10 inches above the bore, and 10.25 inches abreast.

The sight lacked a "C" corrector. There do not seem to be temperature correctors or open sights.

Torpedoes

The ships had five submerged 18-in torpedo tubes:[7]

  • two on broadside forward, depressed three degrees and bearing abeam; axis of tube was 7 foot 5.75 inches below load water line and 1 feet 6 inches above deck.
  • two on broadside aft, depressed three degrees and bearing abeam; axis of tube was 7 foot 5.75 inches below load water line and 1 feet 6 inches above deck.
  • one at the stern, undepressed and with the axis of tube was 3 feet below load water line and 2 foot 7 inches above the deck

In 1909, as heater torpedo supplies were still growing, these ships were to receive two 18-in Fiume Mark III** H. Torpedoes each.[8]

In 1913, it was approved, as part of a general reallocation of 18-in torpedoes, to replace the torpedoes on Minotaur class (except Shannon, which received 18-in Fiume Mark III** H. Torpedoes), Duke of Edinburgh and Bristol classes with Fiume Mark III** torpedoes.[9]

In early 1914, the ships had four Torpedo Director Pattern 2006s and were to have them exchanged for -A models which supported gyro angling.[10]

Fire Control

Fire Control Circuits[11]

Rangefinders

Directors

In 1916, it was approved that the ships of this class should be retrofitted with directors as time, resources and opportunity permitted.[12]

Plans to outfit these ships with directors started in early 1915 but were slow to execute. Defence was lost before receiving hers, but in May 1915 her torpedo officer Hugh Cecil Robert Feilding and Sub-Lieutenant John Scott Dove were thanked by the Admiralty along with other officers for creating an extempore installation in the ship. The other vessels, Minotaur and Shannon received their proper equipment in August and October 1918, respectively.[13]

The Elevation Receivers for the 9.2-in and the 7.5-in batteries were 4-in Triple Type with mechanical tilt correctors, Pattern H. 13. They could indicate elevations up to 15 degrees. The Small Type Training Receivers were pattern number 20 in "A" turret and S1 to S3 and P1 to P3, whereas "Y" turret and S4 and S5 and P4 and P5 had pattern number 21.[14]

Transmitting Stations

There were two, as one is called the fore T.S. in a 1915 source and the image above clearly can only pertain to this class.[15][16]

Dreyer Table

These ships had no Dreyer table.[17]

Fire Control Instruments

The ships in this class primarily used Barr and Stroud Mark II Fire Control Instruments.

The Handbook for Fire Control Instruments, 1909 lists their equipment as:[18]

  • Combined Range, Order, Deflection: 8 transmitters, 40 receivers
  • Group Switches: 4
  • Rate: 4 transmitters, 12 receivers
  • Bearing: none
  • Range: none

Additionally, this class had the following Siemens fire control equipment:[19]

  • Turret fire gongs: 26 with 8 keys
  • Fire Gongs: 8 with 2 keys
  • Captain's Cease Fire Bells: 16 with 1 key

By 1915, however, some Barr and Stroud bearing instruments had been installed.[20]

The 9.2-in turrets each had 2 bearing receivers that could be driven by a transmitter in the fore T.S. or by one of two special master transmitters mounted port and starboard in the foretop. A C.O.S. in the fore T.S. selected whether the 9.2-in group was driven by the transmitter in the fore T.S. or by one of the masters in the foretop. The fore T.S. had 3 repeat receivers wired off the 9.2-in and both 7.5-in groups to facilitate in changing over. The 7.5-in guns each had a single receiver, and the "special bearing transmitters" in the foretop also had a repeat receiver for their group. The overall bill of fare ran to:

  • 2 special bearing transmitters, Graham's type
  • 3 Barr and Stroud bearing transmitters (2 in foretop, 1 in fore T.S.)
  • 19 bearing receivers:
    • 4 in the two 9.2-in turrets
    • 10 at the ten 7.5-in guns
    • 3 repeats in the fore T.S.
    • 2 repeats in the foretop
  • Three C.O.S. (one in fore T.S., and two in foretop)

It is not clear to me why "special" bearing transmitters were required, and how these were made compatible with the B&S receivers.

None of the ships had Target Visible or Gun Ready signals.[21]

Flash Precautions

In early 1915 ships were called upon to report on what extemporary steps were considered necessary to prevent the ignition of charges in casemates, batteries and ammunition passages. The report from Defence read in part:

In this ship the comparative safety of the passages makes the danger less than in many other cases, and with the number of guns to be supplied it is better to accept some risk rather than reduce the rate of fire supply, which anything of real use in this line must do.[22]

See Also

Footnotes

  1. ↑ McBride. "Lord Nelson and Agamemnon." p. 71.
  2. ↑ Admiralty Weekly Orders. 28 Feb, 1913. The National Archives. ADM 182/4.
  3. ↑ The Sight Manual. 1916. pp. 53, 105, 108, 110.
  4. ↑ NavWeaps.com believes the 2 CRH ammunition only was provided to these weapons.
  5. ↑ The Sight Manual. 1916. pp 58, 105, 108, 110.
  6. ↑ The Sight Manual. 1916. p. 94, 108, Plate 47.
  7. ↑ Torpedo Manual, Vol. III, 1909. p. 265.
  8. ↑ Annual Report of the Torpedo School, 1909. p. 14.
  9. ↑ Annual Report of the Torpedo School, 1913. p. 8.
  10. ↑ Admiralty Weekly Order No. 1019 of 17 Apr, 1914.
  11. ↑ Annual Report of the Torpedo School, 1907. Plate 17.
  12. ↑ Annual Report of the Torpedo School, 1916. p. 175.
  13. ↑ The Technical History and Index, Vol. 3, Part 23. p. 15.
  14. ↑ The Director Firing Handbook. pp. 145, 146.
  15. ↑ Annual Report of the Torpedo School, 1915. p. 219.
  16. ↑ Annual Report of the Torpedo School, 1907. Plate 17.
  17. ↑ Handbook of Captain F. C. Dreyer's Fire Control Tables, 1918. p. 3.
  18. ↑ Handbook for Fire Control Instruments, 1909. p. 58.
  19. ↑ Handbook for Fire Control Instruments, 1909. p. 58.
  20. ↑ Annual Report of the Torpedo School, 1915. p. 219.
  21. ↑ Handbook for Fire Control Instruments, 1914. p. 11.
  22. ↑ Storage and Handling of Explosives in Warships. pp. 6, 8.

Bibliography

  • Friedman, Norman (2012). British Cruisers of the Victorian Era. Annapolis: Naval Institute Press. ISBN 1591140684 (on Amazon.com and Amazon.co.uk).
  • 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.
  • Gray, Randal (editor) (1985). Conway's All the World's Fighting Ships 1906–1921. London: Conway Maritime Press. (on Amazon.com and Amazon.co.uk).
  • 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.
  • 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.
  • R A Burt. Minotaur: Before the Battlecruiser in Warship, Volume XI Issue 42.


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