san class cruiser class consisted armored cruisers built decade 20th century second ship evaluate recently invented steam turbines large ship incorporated number technological advances ships participated repair war supported ground forces libya naval gunfire helped occupy towns libya islands world war ships activities limited threat austro hungarian submarines bombard albania spent years far_east italian war training ship brief deployment spain reconstructed better serve role training ship ship anti aircraft armament augmented deployed libya reinforce port defenses italy declared war britain scuttled early allied forces capture port wreck salvaged sank tow converted target ship early 1930s found sunk end war scrapped design description san class ordered immediately preceding class ships improved version design forecastle extended improve turret armor increased improved propulsion machinery given steam turbines fitted large italian ship comparative purposes retained traditional vertical triple expansion steam engines innovative ship turbine powered ship navy propeller shafts compass tanks use wood way san class ships length perpendiculars meters overall length meters beam meters draft meters ships displaced metric tons long tons normal load metric tons long tons deep load ships complement officers enlisted men propulsion machinery installation class changed comparison class engines amidships mixed firing water tube boilers fore aft engines widely spaced pairs funnels designed maximum speed knots mph ships given different types propulsion machinery evaluation shafts pair indicated horsepower steam engines boilers differed slightly contrast shafts driven license built parsons steam turbine turbines steam provided boilers working pressure psi kpa cm2 reach designed output shp ships exceeded designed speeds reaching knots mph knots mph sea trials biggest difference sisters turbines proved significantly economical service range nautical miles speed knots mph nautical miles knots mph compared steam engines nautical miles knots mph nautical miles knots mph armament main armament san class ships consisted guns electrically powered twin gun turrets fore aft superstructure turrets arc fire gun fired kilogram armor piercing projectiles muzzle velocity meters second maximum elevation guns range meters ships mounted electrically powered twin gun turrets amidships secondary armament arc fire armstrong guns fired kilogram shells maximum elevation guns range meters defense torpedo boats mounted quick firing caliber guns mounted sides hull rest superstructure ships fitted pair caliber guns san class ships equipped submerged torpedo tubes world war guns replaced anti aircraft guns torpedo tube removed protection ships protected armored belt thick amidships reduced bow stern belt high waterline armored deck thick conning tower armor thick gun turrets protected armour turrets ships service ran aground august heavily damaged repair june missing italo turkish war supported libya war bombarded fortifications defending entrance dardanelles supported forces occupying island rhodes february cruised port visit greece month ran aground november slightly damaged world war activities ships restricted threat submarine attack armored cruisers sunk submarines shortly italy joined war ships participate bombardment albania late war deployed far_east played minor role incident escorted ferried crown prince south america july september supported operations italian ship disarmed converted radio controlled target ship old boilers replaced oil burning ones reduced maximum speed knots mph captured germans occupied september found end war half sunk harbor broken based training ship sent spain spanish civil war began protect italian interests reconstructed serve dedicated training ship naval cadets boilers removed remaining converted burn fuel oil reduced speed knots mph pair funnels guns replaced caliber guns twin turrets abreast funnels torpedo tubes removed received light suite time addition caliber guns dozen machine guns twin mounts prior sent reinforce defenses early fifth gun turret added forecastle twin machine gun mounts added better suit new role floating battery days italy declared war britain june british light cruisers gloucester southampton bombarded attacked hit engagement british submarine fired torpedoes june detonated reaching ship ship guns engaged allied aircraft attacking times destroying scuttled shallow water january prevent capture awarded gold medal military performance wreck refloated sank tow route italy
San Giorgio-class cruiser