Difference between revisions of "Dreyer Table Mark II"

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==Deployment==
 
==Deployment==
  
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The Dreyer Handbook of 1918 lists some ships with Mark II tables, with those no longer in active service crossed out by hand at some later date, and those lost before promulgation not listed at all.  Those appearing in that document are footnoted below<ref name=DreyerP3>''Handbook of Captain F.C. Dreyer's Fire Control Tables, 1918''.  p. 3.</ref>.  Note that this source would not be expected to show ''Queen Mary'' or ''Audacious'', as they were lost well before it was prepared.
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The Dreyer Handbook of 1918 lists some ships with Mark II tables, with those no longer in active service crossed out by hand at some later date, and those lost before promulgation not listed at all.  Those appearing in that document are footnoted below<ref name=DreyerP3>''Handbook of Captain F.C. Dreyer's Fire Control Tables, 1918''.  p. 3.</ref>.  Note that this source would not be expected to show ''Queen Mary'' or ''Audacious'', as they were lost well before it was prepared.   Excepting ''Orion'', the shipboard installations appear to have existed by March 1914.<ref name=gfwo>''order NS14083/14, 27 March 1914, ADM 182/5'', thanks to Mark Harris</ref>
  
 
This source is at slight variance with a schedule of ships listed as those to which Argo Clocks Mark IV would be shipped.<ref name=TH1913>Dreyer & Usborne. ''Pollen Aim Corrector System, Part I. Technical History and Technical Comparison with Commander F. C. Dreyer's Fire Control System, 1913''.  p. 3.</ref>  it is worth noting that this list was for bare Argo clocks and was a ''forecast'' of equipage.
 
This source is at slight variance with a schedule of ships listed as those to which Argo Clocks Mark IV would be shipped.<ref name=TH1913>Dreyer & Usborne. ''Pollen Aim Corrector System, Part I. Technical History and Technical Comparison with Commander F. C. Dreyer's Fire Control System, 1913''.  p. 3.</ref>  it is worth noting that this list was for bare Argo clocks and was a ''forecast'' of equipage.
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|-valign="top"
 
| [[H.M.S. Queen Mary (1912)|''Queen Mary'']]<ref name=TH1913/>
 
| [[H.M.S. Queen Mary (1912)|''Queen Mary'']]<ref name=TH1913/>
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| certainly before Jutland, possibly in 1914
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| prior to 27 March, 1914<ref name=gfwo/>
 
|  
 
|  
 
|-
 
|-
 
| [[H.M.S. Conqueror (1911)|''Conqueror'']]<ref name=DreyerP3/><ref name=TH1913/>
 
| [[H.M.S. Conqueror (1911)|''Conqueror'']]<ref name=DreyerP3/><ref name=TH1913/>
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| N/A
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| prior to 27 March, 1914<ref name=gfwo/>
 
|  
 
|  
 
|-
 
|-
 
| [[H.M.S. Orion (1910)|''Orion'']]<ref name=DreyerP3/>
 
| [[H.M.S. Orion (1910)|''Orion'']]<ref name=DreyerP3/>
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|  
+
| ???
 
|  
 
|  
 
|-
 
|-
 
| [[H.M.S. Ajax (1912)|''Ajax'']]<ref name=DreyerP3/><ref name=TH1913/>
 
| [[H.M.S. Ajax (1912)|''Ajax'']]<ref name=DreyerP3/><ref name=TH1913/>
−
| ???
+
| prior to 27 March, 1914<ref name=gfwo/>
 
|  
 
|  
 
|-
 
|-
 
| [[H.M.S. Audacious (1912)|''Audacious'']]<ref name=TH1913/>
 
| [[H.M.S. Audacious (1912)|''Audacious'']]<ref name=TH1913/>
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| ???
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| prior to 27 March, 1914<ref name=gfwo/>
 
|  
 
|  
 
|-
 
|-
 
| [[H.M.S. Centurion (1911)|''Centurion'']]<ref name=DreyerP3/><ref name=TH1913/>
 
| [[H.M.S. Centurion (1911)|''Centurion'']]<ref name=DreyerP3/><ref name=TH1913/>
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| ???
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| prior to 27 March, 1914<ref name=gfwo/>
 
|  
 
|  
 
|}
 
|}

Revision as of 16:08, 12 December 2010

The Mark II Dreyer Table was a variation of the Mark III Dreyer Table to evaluate the Argo Clock Mark IV by integrating it with the Dreyer range and bearing rate-plots. Little is known of the particulars of the table. Not even the outer dimensions are specified in the Handbook of Captain F.C. Dreyer's Fire Control Tables, 1918.[1]

Development

Little detailed information is known of these tables, as they are glossed over in the 1918 Handbook[2] to such a degree that it is difficult indeed to feel this wasn't a petulant effort to avoid highlighting the competitor's gear.[3]

Argo Clock

The Argo clock was connected so its clock range output caused a commutator to drive an electric motor which then interacted with the Dreyer table in the same manner as did the output shaft of the Dreyer-Elphinstone Range Clock in the Mark III table.[4]

Spotting Corrector

This was probably the same as any Mark III table of the same period.

Range Plot

This aspect of the table was probably much like that in the Mark III table, and evolved through its service life on the same path.

Bearing Plot

This probably was similar to the one used in a Mark III table and tracked the evolution of the plots on those tables. The 1918 Handbook explicitly says that a standard bearing plot was used, but this should be regarded as being suspect for reason of this device's short-lived tenure before the G.D.T. replaced it.

Deployment

The Dreyer Handbook of 1918 lists some ships with Mark II tables, with those no longer in active service crossed out by hand at some later date, and those lost before promulgation not listed at all. Those appearing in that document are footnoted below[5]. Note that this source would not be expected to show Queen Mary or Audacious, as they were lost well before it was prepared. Excepting Orion, the shipboard installations appear to have existed by March 1914.[6]

This source is at slight variance with a schedule of ships listed as those to which Argo Clocks Mark IV would be shipped.[7] it is worth noting that this list was for bare Argo clocks and was a forecast of equipage.


Ship using Mark II table Date equipped Notes
Queen Mary[7] prior to 27 March, 1914[6]
Conqueror[5][7] prior to 27 March, 1914[6]
Orion[5] ???
Ajax[5][7] prior to 27 March, 1914[6]
Audacious[7] prior to 27 March, 1914[6]
Centurion[5][7] prior to 27 March, 1914[6]

See Also

Footnotes

  1. ↑ Handbook of Captain F.C. Dreyer's Fire Control Tables, 1918. p. 90.
  2. ↑ Handbook of Captain F.C. Dreyer's Fire Control Tables, 1918. p. 15.
  3. ↑ The Mark II table receives two sentences in its description and no images whatsoever.
  4. ↑ Handbook of Captain F.C. Dreyer's Fire Control Tables, 1918. p. 15.
  5. ↑ 5.0 5.1 5.2 5.3 5.4 Handbook of Captain F.C. Dreyer's Fire Control Tables, 1918. p. 3.
  6. ↑ 6.0 6.1 6.2 6.3 6.4 6.5 order NS14083/14, 27 March 1914, ADM 182/5, thanks to Mark Harris
  7. ↑ 7.0 7.1 7.2 7.3 7.4 7.5 Dreyer & Usborne. Pollen Aim Corrector System, Part I. Technical History and Technical Comparison with Commander F. C. Dreyer's Fire Control System, 1913. p. 3.

Bibliography

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