NAVYPEDIA

Photo

RO11

Ships

Name	No	Yard No	Builder	Laid down	Launched	Comp	Fate
第19号艦 [19-go], 11.1924- 呂11 [RO11]			Kure K K	8.1916	15.10.1917	7.1919	stricken 1931
第20号艦 [20-go], 11.1924- 呂12 [RO12]			Kure K K	9.1916	1.12.1917	9.1919	stricken 1931

Technical data

Displacement standard, t
Displacement normal, t	735 / 1030
Length, m	69.2
Breadth, m	6.40
Draught, m	3.40
No of shafts	2
Machinery	2 Sulzer diesels / 2 electric motors
Power, h. p.	2600 / 1200
Max speed, kts	18 / 9
Fuel, t	diesel oil 60
Endurance, nm(kts)	4000(10) / 85(4)
Armament	1 x 1 - 76/23 41-shiki, 2 x 1 - 7.7/80, 6 - 450 TT (4 bow, 2 side drop-collars, 10)
Complement	44
Diving depth operational, m	30

Standard scale images

Graphics

Project history

Kaichu (1) (medium Navy design No1) type. Designed in Japan in 1916 on the basis of Schneider-Laubeuf French submarines. In their construction peculiarities of Far East theatre for the first time have been considered. Submarines besides transverse bulkheads had longitudinal ones, that theoretically should raise their damage tolerance, but in practice it has made them only extremely tight and inconvenient for habitability. Diesels were delivered by Sulzer from neutral Switzerland. Double-hulled.

Boats of Kaidai 1 class as a whole have been recognised successful, however they have become operational already after the First World War.

Modernizations

None.

Naval service

No significant events.