Training Receiver: Difference between revisions
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British training receivers actually contained 2 receivers, as they were usually provided indication of the desired training angle through two circuits: a training circuit and a slewing circuit which supported much faster rates of training to find a target. The training receiver then might include a mechanism to correct the training angle for [[Convergence|convergence in training]] to counter the distance between this gun mounting and the firing ship's datum point (the operator would enter the range to the target by a hand-wheel to permit this correction to be applied). | British training receivers actually contained 2 receivers, as they were usually provided indication of the desired training angle through two circuits: a training circuit and a slewing circuit which supported much faster rates of training to find a target. The training receiver then might include a mechanism to correct the training angle for [[Convergence|convergence in training]] to counter the distance between this gun mounting and the firing ship's datum point (the operator would enter the range to the target by a hand-wheel to permit this correction to be applied). | ||
The British Director Firing Handbook | The British ''Director Firing Handbook, 1917'' documents three types of training receivers. | ||
===Turret Type (Single Dial)=== | |||
The single dial turret type had a spiral of 15 inches, allowing convergence angles of up to 1.5 degrees. In the ''Revenge'' class, this would permit the "B" turret to converge at 500 yards, but only permit the "Y" turret to converge at 3,000 yards, owing to their different distances from the convergence datum point. In earlier ships, the convergence scales were only marked down to 3,000 yards, but note was made that the scale was reciprocal and ships were welcome to mark them to closer ranges.<ref>''Director Firing Handbook, 1917'', p. 11, Plates 47-49.</ref> | |||
===Turret Type (Double Dial)=== | |||
<ref>''Director Firing | To simplify the display, this design separated the minutes onto a large upper dial and the degrees to a small lower dial. Convergence range was set as on the single dial instrument, and lining up knobs on the right side placed the training knob above the slewing one, in accordance with the dial arrangement.<ref>''Director Firing Handbook, 1917'', Plates 50-52.</ref> | ||
===Small Type=== | |||
These were for guns 9.2-in and smaller, and had 2 dials for degrees (upper, smaller dial) and minutes (lower, larger dial). They were supplied with 2 spirals. | |||
{| | |||
!Spiral Size|Pattern No.|Max Convergence | |||
|- | |||
|align=center|6-in||Pattern 21||2.5 degrees | |||
|- | |||
|align=center|10-in||Pattern 20||4 degrees | |||
|} | |||
The spiral in use could vary between various mounts on a ship, depending on their distance from datum point. This was the type used for flotilla leaders and destroyers, and were also adapted to use as searchlight bearing receivers. | |||
Convergence range was set by a small handle on the face, reading against a small range scale seen to the left of the upper dial. On the right side, a pair of screw-caps covered the small knobs used to line up slewing and training receiver pointers (upper and lower).<ref>''Director Firing for Destroyers and Flotilla Leaders''</ref><ref>''Director Firing Handbook, 1917'', Plates 53-55.</ref> | |||
===German=== | ===German=== | ||
The German director system must have had training receivers. | |||
The German director system must have had training receivers. | |||
==See Also== | ==See Also== | ||
| Line 30: | Line 40: | ||
==Footnotes== | ==Footnotes== | ||
{{reflist}} | |||
==Bibliography== | ==Bibliography== | ||
{{refbegin}} | |||
*{{BibUKDirectorFiringHandbook1917}} | *{{BibUKDirectorFiringHandbook1917}} | ||
*{{BibUKDirectorFiringForDestroyers1918}} | *{{BibUKDirectorFiringForDestroyers1918}} | ||
*{{BibUKGunneryPocketBook1945}} | *{{BibUKGunneryPocketBook1945}} | ||
{{refend}} | |||
[[Category:Fire Control]] | [[Category:Fire Control]] | ||
[[Category:Shipboard Equipment]] | [[Category:Shipboard Equipment]] | ||
Revision as of 17:41, 9 March 2012
A Training Receiver is a F.T.P. instrument mounted near a trainer's (or turret director trainer's) position which receives and indicates (usually by several red pointers) an angle of training transmitted by a director. The operator then works his controls to train the gun mount to bring the black pointers into alignment with the red.
A training receiver was required in each gun mounting or turret which would be fired under control of a director. Similarly, each separate gun generally required an elevation receiver to guide its gunlayer in matching the director.
Various Examples
British
British training receivers actually contained 2 receivers, as they were usually provided indication of the desired training angle through two circuits: a training circuit and a slewing circuit which supported much faster rates of training to find a target. The training receiver then might include a mechanism to correct the training angle for convergence in training to counter the distance between this gun mounting and the firing ship's datum point (the operator would enter the range to the target by a hand-wheel to permit this correction to be applied).
The British Director Firing Handbook, 1917 documents three types of training receivers.
Turret Type (Single Dial)
The single dial turret type had a spiral of 15 inches, allowing convergence angles of up to 1.5 degrees. In the Revenge class, this would permit the "B" turret to converge at 500 yards, but only permit the "Y" turret to converge at 3,000 yards, owing to their different distances from the convergence datum point. In earlier ships, the convergence scales were only marked down to 3,000 yards, but note was made that the scale was reciprocal and ships were welcome to mark them to closer ranges.[1]
Turret Type (Double Dial)
To simplify the display, this design separated the minutes onto a large upper dial and the degrees to a small lower dial. Convergence range was set as on the single dial instrument, and lining up knobs on the right side placed the training knob above the slewing one, in accordance with the dial arrangement.[2]
Small Type
These were for guns 9.2-in and smaller, and had 2 dials for degrees (upper, smaller dial) and minutes (lower, larger dial). They were supplied with 2 spirals.
| Pattern No.|Max Convergence | ||
|---|---|---|
| 6-in | Pattern 21 | 2.5 degrees |
| 10-in | Pattern 20 | 4 degrees |
The spiral in use could vary between various mounts on a ship, depending on their distance from datum point. This was the type used for flotilla leaders and destroyers, and were also adapted to use as searchlight bearing receivers.
Convergence range was set by a small handle on the face, reading against a small range scale seen to the left of the upper dial. On the right side, a pair of screw-caps covered the small knobs used to line up slewing and training receiver pointers (upper and lower).[3][4]
German
The German director system must have had training receivers.
See Also
Footnotes
Bibliography
- Template:BibUKDirectorFiringHandbook1917
- Template:BibUKDirectorFiringForDestroyers1918
- Template:BibUKGunneryPocketBook1945
