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FIGHTING SHIPS OF THE WORLD
JAPAN
SUBMARINES
"Otsu-Gata B2" cruiser submarines (I40) (1943 - 1944)
Ships
| Name | No | Yard No | Builder | Laid down | Launched | Comp | Fate |
|---|---|---|---|---|---|---|---|
| 伊40 [I40] | Kure K K | 3/1942 | 10.11.1942 | 7.1943 | sunk 25.11.1943 | ||
| 伊41 [I41] | Kure K K | 3/1942 | 10.11.1942 | 9.1943 | sunk 28.11.1944 | ||
| 伊42 [I42] | Kure K K | 3/1942 | 10.11.1942 | 11.1943 | sunk 23.3.1944 | ||
| 伊43 [I43] | Sasebo K K | 4/1942 | 25.10.1942 | 11.1943 | sunk 15.2.1944 | ||
| 伊44 [I44] | Yokosuka K K | 6/1942 | 5.3.1943 | 1.1944 | sunk 29.4.1945 | ||
| 伊45 [I45] | Sasebo K K | 7/1942 | 6.3.1943 | 12.1943 | sunk 28.10.1944 |
Technical data
| Displacement standard, t | 2230 |
|---|---|
| Displacement normal, t | 2624 / 3700 |
| Length, m | 102.4 pp 106.9 wl 108.7 oa |
| Breadth, m | 9.30 |
| Draught, m | 5.20 |
| No of shafts | 2 |
| Machinery | 2 Kampon diesels / 2 electric motors |
| Power, h. p. | 11000 / 2000 |
| Max speed, kts | 23.5 / 8 |
| Fuel, t | diesel oil 220 |
| Endurance, nm(kts) | 14000(16) / 96(3) |
| Armament | most: 1 x 1 - 140/40 11-shiki, 1 x 2 - 25/60 96-shiki, 6 - 533 TT (bow,17), 1 catapult, 1 seaplane (E14Y1) some: 2 x 1 - 140/40 11-shiki, 1 x 2 - 25/60 96-shiki, 6 - 533 TT (bow, 17) |
| Electronic equipment | 2-shiki 2-go radar, 93-shiki sonar, 93-shiki hydrophone, E27 ECM suite |
| Complement | 101 |
| Diving depth operational, m | 100 |
Standard scale images
I44 1945
Project history
Otsu-Gata B2 type. Built under the 1941 War programme. Practically repeated Otsu-Gata B1, differing by some smaller engine power. 8 more submarines were supposed to built under the 1942 programme (Nos 702-709), but works have not been begun.
Modernizations
early 1945, I44: - 1 x 1 - 140/40, catapult with hangar and seaplane; + 4 Kaiten human torpedoes.
3.1945, I44: + 2 Kaiten human torpedoes
Naval service
I40 was lost in December, 1943 in Gilbert's Islands area. I43 15.2.1944 was sunk SE off Guam by US submarine Aspro. I42 was sunk 23.3.1944 off Palau by US submarine Tunny. I45 after 27.10.1944 was lost, possibly, she was sunk 28.10.1944 NE off Surigao Strait by US escort destroyer Whitehurst. I41 was sunk 18.11.1944 E off Samar by US escort destroyer Lawrence С. Taylor and carrier aircraft. I44 was damaged 26.5.1944 at Truk by US submarine Permit, after 4.4.1945 she was lost, possibly sunk 29.4.1945 in Philippine Sea by US carrier aircraft (under other data, sunk 10.4.1945 S from Okinawa by US escort destroyer Fieberling).
