NAVYPEDIA

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  I8 1939  

Ships

Name	No	Yard No	Builder	Laid down	Launched	Comp	Fate
伊7 [I7]			Kure KK	9/1934	3.7.1935	3.1937	sunk 22.6.1943
伊8 [I8]			Kawasaki, Kobe	10/1934	20.7.1936	12.1938	sunk 31.3.1945

Technical data

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)
Electronic equipment	93-shiki sonar, 93-shiki hydrophone
Complement	100
Diving depth operational, m	100

Standard scale images

Graphics

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.