class corvette class group wooden screw built royal_navy late 1860s ships class served overseas brief service lives assigned china african north american regarded obsolete years completed sold design description class designed sir director naval construction lengthened versions eclipse class like smaller ships ram style bow reduce weight forward elimination knee stem similarly shortened counter stern save weight ships feet long perpendiculars beam feet forward ships draught feet inches aft drew displaced long tons tons hull built entirely wood iron crew consisted officers enlisted men different types engines boilers class hms ship completed cylinder horizontal steam engine driving single foot propeller rectangular boilers provided steam engine working pressure psi kpa cm2 engine produced total indicated horsepower gave maximum speed knots mph sea trials contrast later ships cylinder horizontal compound expansion steam engine driving single foot inch propeller cylindrical boilers provided steam engines working pressure psi kpa cm2 engines produced indicated horsepower gave ships maximum speed knots mph carried long tons coal carried additional long tons information available range admiral estimated thirds range sisters despite additional coal carried greater efficiency compound expansion engines class ship rigged sail area square feet lower masts iron masts wood ships poor sailors best speed sail knots mph attributed poor performance sail drag propeller hoisted water attributed sluggish steering sail interference flow water rudder fixed propeller ships rigged commission ships initially armed mix inch pounder cwt rifled muzzle loading guns pounder guns mounted broadside inch guns mounted forecastle chase guns calibre inch gun weighed long tons fired pound shell credited nominal ability penetrate inch armour completion commissions ships rearmed total fourteen lighter cwt pounder guns replaced inch guns chase guns ship completed given armament beginning ships ship built ship initially assigned cape good hope station remained years transferred north_america west indies station refitted return home december included ship recommissioned february returned returned home september paid laid sold scrap trio commissioned assigned remained half years engaged suppression slave trade ship refitted rearmed return home remained reserve recommissioned service transferred years cape crew relieved sent britain ship remained station sold armament bombay construction followed sisters year delay initially assigned transferred year station returned home refitted years later ship assigned ordered home paid arrival sold
Briton-class corvette