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Balilla-class submarine
The ''Balilla''-class were the first submarines to be built for the Italian navy following the end of World War I. They were large ocean-going cruiser submarines designed to operate in the Indian Ocean based in Italy's East African colonies. The design was double-hulled and based on the German Type UE 2 U-boats, one of which, ''U-120'' was supplied to the Italians as a war reparation. A auxiliary diesel engine was installed as an extra generator.
During the war, the boats were stationed in the Mediterranean in 1940 but proved too large to be effective patrol submarines. Their only success was the sinking of the British submarine by ''Enrico Toti'' on 15 October 1940. After 1941 they were used as transport submarines to supply Italian forces in North Africa. The surviving boats were scrapped after the war.
One submarine, , was built for the Brazilian navy to a modified design.
==Design==
The design of the ''Ballila''-class consisted of a strong double-hull which gave the ships a maximum diving depth of , though reached in trials. The boats displaced 1,427 tons surfaced and 1874 tons submerged. They were long with a beam of and a draught of . The boats were considered to have poor stability.〔Chesenau, p.304〕
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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