Imperial Japanese submarine
 Ro-29 submarine and Mitsubishi 2MR4 Aircraft c1930
|
| History |
|---|
 Japan |
|---|
| Name | Submarine No. 68 |
| Builder | Kawasaki, Kobe, Japan |
| Laid down | 2 June 1921 |
| Launched | 5 December 1922 |
| Completed | 15 September 1923 |
| Commissioned | 15 September 1923 |
| Renamed | Ro-29 on 1 November 1924 |
| Decommissioned | 1 April 1936 |
| Stricken | 1 April 1936 |
| Fate | Hulked |
| Renamed | Heisan No. 9 on 1 April 1940 |
| General characteristics |
|---|
| Class and type | Kaichū type submarine (K5 subclass) |
| Displacement |
- 866 tonnes (852 long tons) surfaced
- 1,047 tonnes (1,030 long tons) submerged
|
| Length | 74.22 m (243 ft 6 in) overall |
| Beam | 6.12 m (20 ft 1 in) |
| Draft | 3.73 m (12 ft 3 in) |
| Installed power | |
| Propulsion | |
| Speed |
- 13 knots (24 km/h; 15 mph) surfaced
- 8.5 knots (15.7 km/h; 9.8 mph) submerged
|
| Range |
- 9,000 nmi (17,000 km; 10,000 mi) at 10 knots (19 km/h; 12 mph) surfaced
- 85 nmi (157 km; 98 mi) at 4 knots (7.4 km/h; 4.6 mph) submerged
|
| Test depth | 45.7 m (150 ft) |
| Crew | 44 |
| Armament | |
Ro-29, originally named Submarine No. 68, was an Imperial Japanese Navy Kaichu-Type submarine of the Kaichu V (Toku Chu) subclass. She was in commission from 1923 to 1936 and saw service in the waters of Formosa and Japan.
Design and description
The submarines of the Kaichu V sub-class were designed for anti-shipping operations and carried more fuel and had greater range and a heavier gun armament than preceding Kaichu-type submarines. They displaced 866 tonnes (852 long tons) surfaced and 1,036 tonnes (1,020 long tons) submerged. The submarines were 74.22 meters (243 ft 6 in) long and had a beam of 6.12 meters (20 ft 1 in) and a draft of 3.73 meters (12 ft 3 in). They had a diving depth of 45.7 meters (150 ft).
For surface running, the submarines were powered by two 600-brake-horsepower (447 kW) Sulzer diesel engines, each driving one propeller shaft. When submerged each propeller was driven by a 600-horsepower (447 kW) electric motor. They could reach 13 knots (24 km/h; 15 mph) on the surface and 8.5 knots (15.7 km/h; 9.8 mph) underwater. On the surface, they had a range of 9,000 nautical miles (17,000 km; 10,000 mi) — although the Imperial Japanese Navy officially announced it as 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 four internal bow 533 mm (21.0 in) torpedo tubes and carried a total of eight torpedoes. They were also armed with a single 120 mm (4.7 in) deck gun and one 6.5 mm machine gun.
Construction and commissioning
Ro-29 was laid down as Submarine No. 68 on 2 June 1921 by Kawasaki at Kobe, Japan.[1] Launched on 5 December 1922,[1] she was completed and commissioned on 15 September 1923.[1]
Service history
Upon commissioning, Submarine No. 68 was attached to the Sasebo Naval District, to which she remained attached throughout her active career.[1] On 1 June 1924, she was assigned to both Submarine Division 25 — in which she spent her active career — and the Mako Defense Division headquartered at Mako in the Pescadores Islands.[1] She was renamed Ro-29 on 1 November 1924.[1] On 1 December 1926, she was reassigned to the Sasebo Defense Division, headquartered at Sasebo, Japan.[1] Her service in the Sasebo Defense Division ended on 15 November 1934, after which she served as a unit of Submarine Division 25 in the Sasebo Naval District.[1]
Ro-29 was decommissioned and stricken from the Navy list on 1 April 1936.[1] As a hulk, she was renamed Heisan No. 9 on 1 April 1940.[1]
