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fighting ships of the world

IMPERIAL JAPANESE NAVY (JAPAN)

SUBMARINES

"Kirai-Sen" submarine minelayers (1927-1928)

I121 1945

Name No Yard No Builder Laid down Launched Comp Fate
21 <I21> (ex-第48号艦 <48-go>), 6/1938-121 <I121>     Kawasaki, Kobe 1/1924 30/3/1926 3/1927 surrendered 8/1945, BU 1946
22 <I22> (ex-第49号艦 <49-go>), 6/1938-122 <I122>     Kawasaki, Kobe 10/1924 8/11/1926 10/1927 sunk 10/6/1945
23 <I23> (ex-第50号艦 <50-go>), 6/1938-123 <I123>     Kawasaki, Kobe 10/1924 19/3/1927 4/1928 sunk 29/8/1942
24 <I24> (ex-第60号艦 <60-go>), 6/1938-124 <I124>     Kawasaki, Kobe 10/1924 12/12/1927 12/1928 sunk 20/1/1942

  

Displacement standard, t

1142

Displacement normal, t

1383 / 1768

Length, m

82.0 wl 85.2 oa

Breadth, m

7.52

Draught, m

4.42

No of shafts

2

Machinery

2 MAN diesels / 2 electric motors

Power, h. p.

2400 / 1100

Max speed, kts

14.5 / 7

Fuel, t

diesel oil 154

Endurance, nm(kts) 10500(8) / 40(4.5)
Armament

1 x 1 - 140/40 11-shiki, 4 - 533 TT (bow,12), 42 mines

Complement

51 - 70

Diving depth operational, m 75

Ship project history: Kirai-Sen (Minelaying submarine) type. Unique Japanese purpose-built minelaying submarines. Drawings of the former German submarine U125 received by Japan on a reparation and commissioned by the IJN as 1 were put in a design basis. Double-hulled, endurance was about 20 days. Submarines were built under the 1919 programme. They have appeared unsuccessful because of whimsical system of a minelaying and insufficient longitudinal stability in submerged position. Projected I25 and 26 (ex-Nos52 and 63) were cancelled in 1924.

In 1940 they were fitted with tanks for aviation petrol and then could be used for a refuelling of flying boats at a great distance from bases.

Modernizations: 1940, all: were converted to refueling of large flying boats, petrol tanks were fitted on deck.

Naval service: I121 and I122 since August, 1943 were used for training.

I124 was sunk 20/1/1942 near Darwin by US escort destroyer Edsall and Australian minesweepers Deloraine, Katoomba and Lithgow. I123 was sunk 29/8/1942 SE off Savo by US destroyer Gamble. I122 was sunk 10/6/1945 by US submarine Skate in Toyama Bay (Honshu).

I121

 

Ivan Gogin, 2008-14