AM type submarine
Japanese submarine I-14 in 1945
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| Class overview | |
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| Operators: |
 Imperial Japanese Navy |
| Preceded by: | Type A2 submarine |
| In service: | 1944–45 |
| Planned: | 7 |
| Completed: | 2 |
| Cancelled: | 5 |
| Lost: | 1 |
| Scrapped: | 1 |
| General characteristics | |
| Displacement: |
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| Length: | 113.7 m (373 ft 0 in) overall |
| Beam: | 11.7 m (38 ft 5 in) |
| Draft: | 5.9 m (19 ft 4 in) |
| Installed power: |
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| Propulsion: |
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| Speed: |
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| Range: |
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| Test depth: | 100 m (330 ft) |
| Crew: | 108 |
| Armament: |
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| Aircraft carried: | 2 × Aichi M6A Seiran floatplane |
| Aviation facilities: | 1 × catapult |
The Type AM (A Modified) submarine (巡潜甲型改二潜水艦 Junsen kō-gata kai-ni sensuikan, "Cruiser submarine type A modified 2"?), also called I-13-class submarine (伊一三型潜水艦 I-jū-san-gata sensuikan?) was a pair of large, aircraft-carrying cruiser submarines built for the Imperial Japanese Navy (IJN) during World War II.
The Type AM submarines were versions of the preceding A2 class with the command facilities replaced by an enlarged aircraft hangar were fitted for a pair of Aichi M6A1 floatplane bombers. They displaced 3,661 tonnes (3,603 long tons) surfaced and 4,838 tonnes (4,762 long tons) submerged. The submarines were 113.7 meters (373 ft 0 in) long, had a beam of 11.7 meters (38 ft 5 in) and a draft of 5.9 meters (19 ft 4 in). They had a diving depth of 100 meters (330 ft).
The machinery was reduced in power from the A2-class boats. For surface running, the boats were powered by two 2,200-brake-horsepower (1,641 kW) diesel engines, each driving one propeller shaft. When submerged each propeller was driven by a 300-horsepower (224 kW) electric motor. They could reach 16.75 knots (31.02 km/h; 19.28 mph) on the surface and 5.5 knots (10.2 km/h; 6.3 mph) underwater. On the surface, the AMs had a range of 21,000 nautical miles (39,000 km; 24,000 mi) at 16 knots (30 km/h; 18 mph); submerged, they had a range of 60 nmi (110 km; 69 mi) at 3 knots (5.6 km/h; 3.5 mph).
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