Name I-74 Laid down 16 October 1934 Renamed I-174, 1942 Construction started 16 October 1934 Length 105 m | Ordered 1934 Commissioned 15 August 1938 Struck 10 June 1944 Launched 28 March 1938 Builder Sasebo Naval Arsenal | |
The Japanese submarine I-174 (I-74, until 20 May 1942) was a Kaidai type of cruiser submarine of the KD6B sub-class, built for the Imperial Japanese Navy (IJN) during the mid-1930s.
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Design and description
The submarines of the KD6B sub-class were essentially repeats of the preceding KD6A sub-class. They displaced 1,814 tonnes (1,785 long tons) surfaced and 2,605 tonnes (2,564 long tons) submerged. The submarines were 105 meters (344 ft 6 in) long, had a beam of 8.2 meters (26 ft 11 in) and a draft of 4.57 meters (15 ft 0 in). The boats had a diving depth of 75 m (246 ft)
For surface running, the boats were powered by two 4,500-brake-horsepower (3,356 kW) diesel engines, each driving one propeller shaft. When submerged each propeller was driven by a 900-horsepower (671 kW) electric motor. They could reach 23 knots (43 km/h; 26 mph) on the surface and 8 knots (15 km/h; 9.2 mph) underwater. On the surface, the KD3Bs had a range of 10,000 nautical miles (19,000 km; 12,000 mi) at 16 knots (30 km/h; 18 mph); submerged, they had a range of 65 nmi (120 km; 75 mi) at 3 knots (5.6 km/h; 3.5 mph).
The boats were armed with six internal 53.3 cm (21.0 in) torpedo tubes, four in the bow and two in the stern. They carried a total of 14 torpedoes. They were also armed with one 120 mm (4.7 in) deck gun for combat on the surface and two 13.2 mm (0.52 in) anti-aircraft machineguns.
Construction and career
She completed eight war patrols during the Pacific War. She attacked Convoy GP55 on 16 June 1943. During her ninth war patrol, she was sunk near Truk on 12 April 1944 by a United States Navy B-24 Liberator patrol aircraft from VB-108.