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FIGHTING SHIPS OF THE WORLD
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CRUISERS
AURORA light cruiser (1914/1920)


Photo



Phaeton 1915

Ships


Name No Yard No Builder Laid down Launched Comp Fate
Aurora     Devonport DYd, UK 24.10.1912 30.9.1913 9.1914 // 11.1920 sold for BU 8.1927


Technical data


Displacement normal, t

3750

Displacement full, t

4400

Length, m

132.9

Breadth, m

11.9

Draught, m

4.10

No of shafts

4

Machinery

4 Parsons steam turbines, 8 boilers

Power, h. p.

40000

Max speed, kts

28.5

Fuel, t

oil 875

Endurance, nm(kts)3200(16)
Armour, mm

belt: 76 - 25, deck: 25, CT: 76, gun shields: 102

Armament

2 x 1 - 152/45 BL Mk XII, 6 x 1 - 102/45 QF Mk V, 2 x 1 - 76/45 20cwt QF Mk I, 4 x 2 - 533 TT, 70 - 74 mines

Complement

276 - 282



Standard scale images


<i>Royalist</i> 1919
Royalist 1919


Graphics


<i>Phaeton</i> 1915
Phaeton 1915


Project history

 The grave shortage of cruisers capable of working with the Fleet was matched by a lack of ships for strengthening the flotillas. By 1911 the speed of destroyers had made it impossible for the 'Scouts' to lead a high-speed dash and that gap would widen with the introduction of what became the 'K' and 'L' classes. To examine the problem a Cruiser Committee was set up by the new First Lord, Churchill, late in 1911. Two basic lines of development were examined: a super-Swift or enlarged destroyer relying only on speed, or a super-Active, an enlarged scout with lower speed but some armour protection and a much heavier armament. As might be expected, Fisher wanted the super-Swift because of its alleged high speed (37kts), but Churchill backed the 'cruiser admirals' on the committee in their preference for an uprated 'Scout'. She would cost £285,000 as against £350,000 for a Dartmouth. By working in the armour as part of the longitudinal strength the DNC was able to increase the armour protection amidships. The E-in-C, Sir Henry Oram, proposed to use fast-running destroyer turbines and boilers to get speed up from 28 to 30 or even 31kts. The higher speed proved illusory as so much extra weight was worked into the design but even so a sea speed of 27.5kts was a great improvement over previous cruisers. Many sources quote the installed power as 30,000shp. This was the designed hp, with an extra 10,000shp load but in practice the load shp came to be used as standard. Proposed armaments were 10 102mm, as in the 'Scouts' or 5 152mm, but ultimately a compromise of 2 152mm and 6 102mm was chosen. When presented to Parliament, Churchill described them as 'light armoured cruisers', to emphasise the protection for they were the smallest British warships to be protected by vertical armour. In practice the Arethusa class proved successful in the North Sea, although very cramped as a result of wartime additions. They would not have been able to replace the 'Towns' on overseas stations, as witness the fact that the Arethusas disappeared very quickly after the war, whereas many of the older 'Towns' were kept on for some years.

Protection

Armoured belt protected ship at full length, its thickness was 76mm abreast machinery spaces (51mm armour on 25mm plating), 51mm (38mm armour on 13mm plating) aft and 38mm (25mm armour on 13mm plating) fore. Belt was closed by aft 25mm bulkhead near stern. It extended to main deck (and to upper deck abreast machinery). Machinery and steering gear were covered by 25mm deck.

Modernizations

None.

Naval service

No significant events.

© Ivan Gogin, 2015