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fighting ships of the world

IMPERIAL JAPANESE NAVY (JAPAN)

SUBMARINES

"Junsen 3" large patrol submarines (1937-1938)

I7 1943

Name No Yard No Builder Laid down Launched Comp Fate
7 <I7>     Kure KK 9/1934 3/7/1935 3/1937 sunk 22/6/1943
8 <I8>     Kawasaki, Kobe 10/1934 20/7/1936 12/1938 sunk 31/3/1945

  

Displacement standard, t

2231

Displacement normal, t

2525 / 3538

Length, m

103.8 pp 107.0 wl 109.3 oa

Breadth, m

9.10

Draught, m

5.26

No of shafts

2

Machinery

2 Kampon diesels / 2 electric motors

Power, h. p.

11200 / 2800

Max speed, kts

23 / 8

Fuel, t

diesel oil 230

Endurance, nm(kts) 14000(16) / 60(3)
Armament

1 x 1 - 140/40 11-shiki, 2 x 1 - 13.2/76, 6 - 533 TT (bow,21), 1 catapult, 1 seaplane (E9W1)

Sensors 93-shiki sonar, 93-shiki hydrophone

Complement

100

Diving depth operational, m

100

Ship project history: Junsen 3 (Cruiser submarine 3) type. Built under 2nd Supplementary programme of 1934. Though these ships concerned to cruiser Junsen type, for a basis at their designing were fleet submarines of Kaidai 6 type were taken. Aviation armament was similar to used on Junsen 1M and Junsen 2 types. Double-hulled. CT and free board were protected by light armour. Endurance was about 60 days.

Modernizations: 1942, both: - 1 x 1 - 13.2/76; + 1 x 2 - 25/60 96-shiki, 1 x 2 - 13.2/76.

early 1945, I8: - 1 catapult with hangar and seaplane; + 2 x 2 - 25/60 96-shiki, 4 Kaiten human torpedoes, presumably 2-shiki 2-go radar

Naval service: I7 22/6/1943 was damaged by gunfire of US destroyer Monaghan, run ashore at Kiska (Aleuts) and was blown up by crew and abandoned. I8 was sunk 31/3/1945 SE off Okinawa by gunfire of US destroyers Morrison and Stockton. 

 

I8 1939

 

Ivan Gogin, 2008-14