Vickers F.T.P. Fire Control Instruments: Difference between revisions
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[[File:HFCI1914Plate15.jpg|thumb| | [[File:HFCI1914Plate15.jpg|thumb|480px|'''Vickers F.T.P. Instruments, c1914'''<ref>''Handbook of Fire Control Instruments, 1914'', Plate 15. </ref><br>The range receiver in the upper left is a Mark III. ]] | ||
After initial success supplying [[Vickers Dial Fire Control Instruments|dial instruments]], [[Vickers]] manufactured a variety of [[Step-by-Step]] [[Fire Control Instrument]]s incorporating the [[F.T.P.|"follow-the-pointer"]] principle. They were first used in ''Boadicea'', around 1909, and regained Vickers the lead it had lost in 1906 to Barr and Stroud in supplying sightsetting instruments. | After initial success supplying [[Vickers Dial Fire Control Instruments|dial instruments]], [[Vickers]] manufactured a variety of [[Step-by-Step]] [[Fire Control Instrument]]s incorporating the [[F.T.P.|"follow-the-pointer"]] principle. They were first used in ''Boadicea'', around 1909, and regained Vickers the lead it had lost in 1906 to Barr and Stroud in supplying sightsetting instruments. | ||
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These were considerably different from the Mark I, internally, by having a brushless design.<ref>''Handbook of Fire Control Instruments, 1914'', p. 18. </ref> The range transmitter did not transmit pulses equating to any given range increment, but one rotation of the handle moved the pointer a quarter degree. In deflection, one revolution yielded 1.5 knots of deflection.<ref>''Handbook of Fire Control Instruments, 1914'', p. 19. </ref> | These were considerably different from the Mark I, internally, by having a brushless design.<ref>''Handbook of Fire Control Instruments, 1914'', p. 18. </ref> The range transmitter did not transmit pulses equating to any given range increment, but one rotation of the handle moved the pointer a quarter degree. In deflection, one revolution yielded 1.5 knots of deflection.<ref>''Handbook of Fire Control Instruments, 1914'', p. 19. </ref> | ||
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!colspan=3| Mark II Pattern Numbers<br>for given guns<ref>''Handbook of Fire Control Instruments, 1914'', p. 21. </ref> | !colspan=3| Mark II Pattern Numbers<br>for given guns<ref>''Handbook of Fire Control Instruments, 1914'', p. 21. </ref> | ||
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Although the Mark III devices differed by the sights they were fitted to, when delivered on a base plate alone, the Pattern numbers were as follows. | Although the Mark III devices differed by the sights they were fitted to, when delivered on a base plate alone, the Pattern numbers were as follows. | ||
{|border=1 | {|border=1 style="float: right;" | ||
!colspan=3| Mark III Pattern Numbers<br>without sight dial<ref>''Handbook of Fire Control Instruments, 1914'', p. 21. </ref> | !colspan=3| Mark III Pattern Numbers<br>without sight dial<ref>''Handbook of Fire Control Instruments, 1914'', p. 21. </ref> | ||
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Revision as of 20:32, 22 April 2011
After initial success supplying dial instruments, Vickers manufactured a variety of Step-by-Step Fire Control Instruments incorporating the "follow-the-pointer" principle. They were first used in Boadicea, around 1909, and regained Vickers the lead it had lost in 1906 to Barr and Stroud in supplying sightsetting instruments.
Mark I
These were electrically similar to the dial instruments Vickers had previously provided. A chopper handle built into the switch at the transmitter lifted the brushes off the rotor when the indication was not being driven.[2] They were only used in Boadicea,[3] although one source[4] indicates they were also used in Bellona.
| Mark I Pattern Numbers for 4-inch guns[5] | |
|---|---|
| Device | Pattern No. |
| Range Transmitter | 2643 |
| Range Receiver | 2645 |
| Deflection Transmitter | 2644 |
| Deflection Receiver | 2646 |
Mark II
These were considerably different from the Mark I, internally, by having a brushless design.[6] The range transmitter did not transmit pulses equating to any given range increment, but one rotation of the handle moved the pointer a quarter degree. In deflection, one revolution yielded 1.5 knots of deflection.[7]
| Mark II Pattern Numbers for given guns[8] | ||
|---|---|---|
| Device | 4-in guns | 6-in guns |
| Range Transmitter | 2651 | 2647 |
| Range Receiver | 2652 | 2648 |
| Deflection Transmitter | 2653 | 2649 |
| Deflection Receiver | 2654 | 2650 |
Mark III
These were similar to the Mark II, electrically, but differed by having the receiver not be part of the sight, rendering it cheaper and simpler in construction. Also, the transmitter did not have a sight dial as a tell-tale — simply a drum transmitter and repeat receiver.[9]
Although the Mark III devices differed by the sights they were fitted to, when delivered on a base plate alone, the Pattern numbers were as follows.
| Mark III Pattern Numbers without sight dial[10] | ||
|---|---|---|
| Device | Pattern No. | |
| Range Transmitter | 2660 | |
| Range Receiver Range Repeat Receiver |
2662 | |
| Deflection Transmitter | 2661 | |
| Deflection Receiver Deflection Repeat Receiver |
2679 | |
Mark III*
These transmitters (which worked with Mark III receivers) could use Cross-connecting Gear by virtue of their wheel gearing, permitting them to drive two or more transmitters by the action of one man at the mechanical transmitter box.[12]
The range transmitter was Pattern 2690 and the deflection transmitter Pattern 2691.[13]
Mark IV*
These transmitters (which worked with Mark III receivers) were being introduced around 1914 to be first tried in the Queen Elizabeth class and featured an improved cross-connecting gear arrangement for the transmitter.[14]
See Also
Footnotes
- ↑ Handbook of Fire Control Instruments, 1914, Plate 15.
- ↑ Handbook of Fire Control Instruments, 1914, p. 18.
- ↑ Handbook of Fire Control Instruments, 1914, p. 72.
- ↑ Handbook of Fire Control Instruments, 1909, p. 57.
- ↑ Handbook of Fire Control Instruments, 1914, p. 21.
- ↑ Handbook of Fire Control Instruments, 1914, p. 18.
- ↑ Handbook of Fire Control Instruments, 1914, p. 19.
- ↑ Handbook of Fire Control Instruments, 1914, p. 21.
- ↑ Annual Report of the Torpedo School, 1909, p. 148.
- ↑ Handbook of Fire Control Instruments, 1914, p. 21.
- ↑ Handbook of Fire Control Instruments, 1914, Plate 10.
- ↑ Annual Report of the Torpedo School, 1909, p. 148.
- ↑ Handbook of Fire Control Instruments, 1914, p. 21.
- ↑ Handbook of Fire Control Instruments, 1914, p. 20.
Bibliography
- Template:BibUKARTS1903
- Template:BibUKARTS1904
- Template:BibUKARTS1906
- Template:BibUKTorpedoDrillBook1905
- Template:BibUKTorpedoDrillBook1908
- Template:BibUKTorpedoDrillBook1912
- Template:BibUKTorpedoDrillBook1914
- 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.
