class monitor class monitor group ironclad monitors built royal_navy 1870s slightly modified versions class monitors ships ordered satisfy demands local defence war scare pace construction slowed perceived threat war declined class monitors spent careers reserve finally sold design description immediate reason ships ordered local coast defence war scare franco prussian war chosen reasons small cheap shallow draft thought limit defensive operations appealed economy defence minded members parliament admiralty envisioned attacking shallow water ports larger ironclads enter operating shallow waters baltic_sea ships basic design class monitors reduce design construction time hulls completed quickly pace building reduced likelihood immediate use diminished delivered royal commissioned fitting number years process completed little sense urgency remained ships length perpendiculars feet beam feet draught feet inches deep load displaced long tons crew consisted officers men class ships ships type described admiral like armoured knights riding easy avoid bad close unfit face heavy weather decks frequently moderate sea accommodations rated worst fleet referred ordinary seamen air propulsion class ships steam engines driving single foot propeller cylinder inverted compound steam engines working pressure psi kpa cm2 engines produced total indicated horsepower sea trials gave ships maximum speed knots mph engines built simple horizontal cylinder direct acting steam engines working pressure psi kpa cm2 produced total indicated horsepower speed pair ships carried long tons coal second pair carried long tons steam nmi mph armament ships mounted pair inch rifled muzzle loading guns turret shell inch gun weighed pounds gun weighed long tons gun muzzle velocity credited ability penetrate nominal wrought iron armour muzzle guns fire solid shot explosive shells mounted compound carriages hydraulic elevate guns armour class ships complete waterline belt wrought iron inches thick amidships inches ends superstructure conning tower fully armoured reason called inches wrought iron gun turrets inches faces inches sides rear vertical armour backed inches teak decks inches thick construction ships towed devonport builders commissioned placed reserve finally completed refit recommendation ships construction extend superstructure sides ship improve stability acted refitted 1880s refit strengthened upper decks added watertight bulkhead false keel quick firing pounder hotchkiss guns added torpedo boat defence machine guns increased crew approximately men added long tons displacement service hms ship completed served tender gunnery school ship devonport ships commissioned april august war scare russo turkish war service admiral sir portland harbour resumed duties tender refitted ships class participated annual fleet times like sisters placed non effective list sold hms ship completed service paid served tender ship refitted chatham lead ship class ship completed placed 1st reserve completion ship paid chatham august refitted fourth final ship class completed paid devonport service ship refitted placed reserve devonport
Cyclops-class monitor