Capitán O'Brien 1929
| Name | No | Yard No | Builder | Laid down | Launched | Comp | Fate |
| Capitán O'Brien | O | Vickers-Armstrong, Barrow, UK | 1928 | 2.10.1928 | 6.1929 | discarded 1957 | |
| Almirante Simpson | S | Vickers-Armstrong, Barrow, UK | 1928 | 15.1.1929 | 9.1929 | discarded 1957 | |
| Capitán Thomson | T | Vickers-Armstrong, Barrow, UK | 1928 | 15.1.1929 | 8.1929 | discarded 4.1958 |
|
Displacement standard, t |
1412 |
|
Displacement normal, t |
1540 / 2020 |
|
Length, m |
79.3 |
|
Breadth, m |
8.53 |
|
Draught, m |
4.15 |
|
No of shafts |
2 |
|
Machinery |
2 diesels / 2 electric motors |
|
Power, h. p. |
2750 / 1300 |
|
Max speed, kts |
15 / 9 |
|
Fuel, t |
diesel oil 200 |
| Endurance, nm(kts) | 8400(10) / 70(4) |
|
Armament |
1 x 1 - 120/45 Vickers-Armstrong E, 1 x 1 - 7.7/87, 8 - 533 TT (6 bow, 2 stern, 16) |
| Electronic equipment | presumably type 118 sonar |
|
Complement |
54 |
| Diving depth operational, m | 95 |
Project history: Submarines were designed under Chilean order on the basis of first post-war British submarines of O class. Saddle-tank hull. Boats differed in the big sizes of fin structure on which 120mm/45 Vickers-Armstrong Mk E gun was installed in rotated semi-turret. Using of this gun on Chilean submarines was unique: similar guns have not found service on British submarines because of separate loading. All three submarines arrived to Valparaiso 5.3.1930.
Modernizations: None.
Naval service: Capitán O'Brien after write-off foundered at Talcahuano in 1959 and was salvaged and broken up only in 1988.
Almirante Simpson 1930
© Ivan Gogin, 2011-15