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fighting ships of the world

IMPERIAL JAPANESE NAVY (JAPAN)

SUBMARINES

"Kai-Toku-Chu" 2 class submarines (1923-1927)

RO30 1943

Name No Yard No Builder Laid down Launched Comp Fate
第68号艦 <68-go>, 11/1924- 29 <RO29>     Kawasaki, Kobe 6/1921 5/12/1922 9/1923 sold 4/1936
第69号艦 <69-go>, 11/1924- 30 <RO30>     Kawasaki, Kobe 8/1921 18/1/1923 4/1924 stricken 4/1942
第70号艦 <70-go>     Kawasaki, Kobe 8/1922 2/1923 --- sunk in trials 21/8/1923
31 <RO31>     Kawasaki, Kobe 12/1924 25/9/1926 5/1927 stricken 5/1945
第71号艦 <71-go>, 11/1924- 32 <RO32>     Kawasaki, Kobe 9/1921 19/3/1923 5/1924 stricken 4/1942

  

Displacement standard, t

 

Displacement normal, t

665 / 1030

Length, m

74.2

Breadth, m

6.10

Draught, m

3.70

No of shafts

2

Machinery

2 FIAT diesels / 2 electric motors

Power, h. p.

1200 / 1200

Max speed, kts

13 / 8

Fuel, t

diesel oil 113 - 116

Endurance, nm(kts) 8000(10) / 85(4)
Armament

1 x 1 - 120/45 11-shiki, 1 x 1 - 7.7/87, 4 - 533 TT (bow, 8)

Complement

43

Diving depth operational, m

75

Ship project history: Kai-Toku-Chu (Medium special Admiralty) type. Built under the 1918 programme, developed on the basis of the Schneider-Laubeuf design. Nos72-87 were cancelled under terms of Washington Treaty.

Modernizations: none

Naval service: 70-go during commissioning trials 21/8/1923 foundered in Kobe harbour as result of technical accident, salvaged in November, 1924. She was officially repaired and completed in 1927 but as fact new submarine was built.

RO30-32 were laid up 1/4/1942, till the end of war they were used as training hulks. RO31 was scuttled by Americans 5/4/1946.

RO31

Ivan Gogin, 2008-14