Pelorus-class cruiser

	HMS Pyramus in 1914
Class overview
Name	Pelorus
Operators	Royal Navy
Preceded by	Arrogant class
Succeeded by	Highflyer class
Built	1896–1899
In commission	1899–1922
Completed	11
Lost	1
Scrapped	10
General characteristics
Type	Protected cruiser
Displacement	2,135 long tons (2,169 t)
Length	300 ft (91.4 m) (p/p, 313 ft 6 in (95.6 m) (o/a)
Beam	36 ft 6 in (11.1 m)
Draught	17 ft (5.2 m)
Installed power	7,000 ihp (5,200 kW)
Propulsion	2 shafts, Vertical triple-expansion steam engines; 16 water-tube boilers;
Speed	20 knots (37 km/h; 23 mph)
Complement	224
Armament	8 × QF 4-inch (102 mm) guns; 8 × 3-pounder (47 mm) quick firing guns; 2 × 18 inch (450 mm) torpedo tubes;
Armour	Deck: 1.5–2 in (38–51 mm); Conning tower: 3 in (76 mm);

The Pelorus-class cruiser was a "third-class" protected cruiser designed by Sir William White (Director of Naval Construction 1885 – 1902) for the Royal Navy, based on the earlier Pearl-class cruisers. Eleven ships were ordered to this design in 1893 under the Spencer Programme, and were laid down 1896–1900. The first, HMS Pelorus, was commissioned in 1896.

Development and design

The Pelorus class ships displaced 2,135 tons and had a top speed of 20 knots (37 km/h; 23 mph). Most served in minor roles on overseas or colonial patrol work, not with the main battlefleets. They carried a complement of 224 and were armed with eight QF 4-inch (25 pounder) guns, eight 3 pounder guns, three machine guns, and two 18-inch (450-mm) torpedo tubes.

They had reciprocating triple expansion steam engines and were equipped with different types of boiler which were trialled in these cruisers. Some had Normand water-tube boilers which could give 7,000 horsepower (5,200 kW) for limited periods of time with forced draught and 5,000 horsepower (3,700 kW) under natural draught.

Ships in the class

Name	Launched	Fate
Pactolus	21 December 1896	Sold for scrap on 25 October 1921
Pandora	17 January 1900	Sold for scrap in July 1913
Pegasus	4 March 1897	Sunk 20 September 1914 by SMS Königsberg
Pelorus	15 December 1896	Sold for scrap on 6 May 1920
Perseus	15 July 1897	Sold for scrap on 26 May 1914
Pioneer	28 June 1899	Transferred to Australia on 1 March 1913 although not sold until 1 July 1915. Scuttled on 19 February 1931
Pomone	25 November 1897	Sold for scrap in June 1922
Prometheus	20 October 1898	Sold for scrap on 28 May 1914
Proserpine	5 December 1896	Sold for scrap on 30 November 1919
Psyche	19 July 1898	Sold to Australia 1 July 1915. Sold for scrap in June 1922
Pyramus	15 May 1897	Sold for scrap 21 April 1920

Service

In an era of naval innovation, the class was almost outdated before they were launched. They were fitted with a variety of different boilers as a trial but most were not particularly satisfactory; so HMS Pandora was scrapped in 1913, HMS Perseus and HMS Prometheus in 1914. They had all been condemned in 1904 but had been reprieved. The remainder were to be scrapped in 1915, but were kept in service through the First World War. HMS Pegasus was sunk in combat in 1914, the rest - except for HMS Pioneer - were scrapped between 1919 and 1922. HMS Pactolus and HMS Pomone had Blechynden boilers which were particularly unreliable, they were removed from active service several years before others in the class.

Rear Admiral Cresswell, the 1st Naval Member of the Australian Naval Board described Psyche and Pyramus in 1914 as "the unspeakably useless P. class."^[1]

References

^ McGibbon, I.C. (1981) Blue-Water Rationale: The Naval Defence of New Zealand 1914–1942, page 15 note 50 (GP Print, Wellington, NZ) ISBN 0-477-01072-5

External links

Pelorus Class Battleships-Cruisers.co.uk
Pelorous Class Third Class Protected Cruisers worldwar1.co.uk

[1] McGibbon, I.C. (1981) Blue-Water Rationale: The Naval Defence of New Zealand 1914–1942, page 15 note 50 (GP Print, Wellington, NZ) ISBN 0-477-01072-5

[1]

v t Pelorus-class cruisers
Royal Navy	Proserpine Pelorus Pactolus Pegasus Pyramus Perseus Pomone Prometheus Psyche Pioneer Pandora
Royal Australian Navy	Pioneer Psyche
Preceded by: Arrogant class Followed by: Highflyer class
List of cruisers of the Royal Navy

v t British naval ship classes of the First World War
Aircraft/Seaplane carriers	Empress^S^V Riviera^S^V Engadine^S^V Ark Royal^S Ben-my-Chree^S^V Campania^S^V Raven II^S^V Anne^S^V Vindex^S^V Manxman^S^V Furious^M Pegasus^S^V Nairana^S^V Argus^S^V Vindictive^S^V
Dreadnought battleships	Dreadnought^S Bellerophon St Vincent Neptune^S Colossus Orion King George V Erin^S Agincourt^S Iron Duke Canada^S Queen Elizabeth Revenge
Pre-dreadnought battleships	Royal Sovereign Majestic Canopus Formidable London Duncan King Edward VII Swiftsure Lord Nelson
Battlecruisers	Invincible Indefatigable Lion Queen Mary^S Tiger^S Renown Courageous Admiral^S^A
Armoured cruisers	Cressy Drake Monmouth Devonshire Duke of Edinburgh Warrior Minotaur
Heavy cruisers	Hawkins^A
Light cruisers	Town^G Arethusa C^G^C Danae^C Emerald^A
Protected cruisers	Apollo Astraea Eclipse Blake Pearl Edgar Powerful Diadem Arrogant Pelorus Highflyer Challenger Topaze
Scout cruisers	Adventure Forward Pathfinder Sentinel Boadicea Blonde Active
Destroyer flotilla leaders	Swift^S Faulknor Marksman Parker Thornycroft (or Shakespeare)^C Admiralty (or Scott)^C
Destroyers	A^G B^G C^G D^G E^G F G H I K L Admiralty M Hawthorn M Thornycroft M Yarrow M Yarrow Later M Medea Arno^S R^G S^G^C Talisman V and W^G^C
Torpedo boats	TB 81^S TB 98 TB 109 TB 114 Cricket^G
Monitors	Marshal Ney Abercrombie Lord Clive Humber Gorgon M15 M29 Erebus
Minesweepers	Racecourse Hunt Dance
Gunboats	Fly Insect
Submarines	A B C D E F G H^C J K L^C M^C R^C Swordfish^S V
Sloops	P Cadmus Flower Acacia Azalea Arabis Anchusa Aubrietia 24^C
naval trawlers	Castle Mersey
A All completed after the war C One or more completed after the war G Grouping of several classes M converted from Courageous class S Single ship of class V Conversions