| History | |
|---|---|
 Japan | |
| Name | Submarine No. 40 |
| Builder | Yokosuka Naval Arsenal, Yokosuka, Japan |
| Laid down | 20 January 1921 |
| Launched | 15 October 1921 |
| Completed | 10 October 1922 |
| Commissioned | 10 October 1922 |
| Renamed | Ro-22 on 1 November 1924 |
| Stricken | 1 April 1934 |
| General characteristics | |
| Class and type | Kaichū type submarine (K3 subclass) |
| Displacement |
|
| Length | 70.10 m (230 ft 0 in) overall |
| Beam | 6.12 m (20 ft 1 in) |
| Draft | 3.70 m (12 ft 2 in) |
| Installed power |
|
| Propulsion |
|
| Speed |
|
| Range |
|
| Test depth | 45.7 m (150 ft) |
| Crew | 46 |
| Armament |
|
Ro-22, originally named Submarine No. 40, was an Imperial Japanese Navy Kaichū-Type submarine of the Kaichū III subclass. She was commissioned in 1922 and operated in the waters of Japan. She was stricken in 1934.
Design and description
The submarines of the Kaichu III sub-class were a slightly improved version of the preceding Kaichu II subclass, the man difference being an increase in diving depth from 30 to 45.7 meters (98 to 150 ft).[1] They displaced 752 tonnes (740 long tons) surfaced and 1,013 tonnes (997 long tons) submerged. The submarines were 70.10 meters (230 ft 0 in) long and had a beam of 6.12 meters (20 ft 1 in) and a draft of 3.70 meters (12 ft 2 in).
For surface running, the submarines were powered by two 1,450-brake-horsepower (1,081 kW) Sulzer Mark II diesel engines, each driving one propeller shaft. When submerged each propeller was driven by a 600-horsepower (447 kW) electric motor. They could reach 16.5 knots (31 km/h; 19 mph) on the surface and 8.5 knots (15.7 km/h; 9.8 mph) underwater. On the surface, they had a range of 6,000 nautical miles (11,000 km; 6,900 mi) at 10 knots (19 km/h; 12 mph); submerged, they had a range of 85 nmi (157 km; 98 mi) at 4 knots (7.4 km/h; 4.6 mph).
The submarines were armed with six 450 mm (18 in) torpedo tubes, four internal tubes in the bow and two external tubes mounted on the upper deck, and carried a total of ten Type 44 torpedoes. They were also armed with a single 76.2 mm (3.00 in) deck gun mounted aft of the conning tower.[1]
Construction and commissioning
Ro-22 was laid down as Submarine No. 40 on 20 January 1921 by the Yokosuka Naval Arsenal at Yokosuka, Japan.[2] Launched on 15 October 1921,[2] she was completed and commissioned on 10 October 1922.[2]
Service history
Upon commissioning, Submarine No. 40 was attached to the Yokosuka Naval District, to which she remained attached throughout her career.[2] On 16 October 1922, she was assigned to Submarine Division 5 and to the Ominato Defense Division,[2] and on 1 November 1924 she was renamed Ro-22.[2] On 1 November 1925, Submarine Division 5 was reassigned to the Yokosuka Defense Division,[2] then directly to the Yokosuka Naval District on 1 December 1926, and then to the Yokosuka Defense Division again on 10 January 1927.[2] Ro-22 was stricken from the Navy list on 1 April 1934.[2]
Notes
References
- "Rekishi Gunzō"., History of Pacific War Vol.17 I-Gō Submarines, Gakken (Japan), January 1998, ISBN 4-05-601767-0
- Rekishi Gunzō, History of Pacific War Extra, "Perfect guide, The submarines of the Imperial Japanese Forces", Gakken (Japan), March 2005, ISBN 4-05-603890-2
- The Maru Special, Japanese Naval Vessels No.43 Japanese Submarines III, Ushio Shobō (Japan), September 1980, Book code 68343-44
- The Maru Special, Japanese Naval Vessels No.132 Japanese Submarines I "Revised edition", Ushio Shobō (Japan), February 1988, Book code 68344-36
- The Maru Special, Japanese Naval Vessels No.133 Japanese Submarines II "Revised edition", Ushio Shobō (Japan), March 1988, Book code 68344-37
- The Maru Special, Japanese Naval Vessels No.135 Japanese Submarines IV, Ushio Shobō (Japan), May 1988, Book code 68344-39