Dolphin 1940
| No | Name | Yard No | Builder | Laid down | Launched | Comm | Fate |
| SS169 | Dolphin (ex-V7) | Portsmouth N Yd | 6.1930 | 8.3.1932 | 7.1932 | stricken 10.1945 |
|
Displacement standard, t |
|
|
Displacement normal, t |
1688 / 2215 |
|
Length, m |
97.3 |
|
Breadth, m |
8.51 |
|
Draught, m |
3.99 |
|
No of shafts |
2 |
|
Machinery |
2 MAN diesels + 2 MAN diesel-generators / 2 electric motors |
|
Power, h. p. |
3500 / 1750 |
|
Max speed, kts |
17 / 8 |
|
Fuel, t |
diesel oil 412 |
| Endurance, nm(kts) | 6000 (10) / 50 (5) |
|
Armament |
1 x 1 - 102/50 Mk 9, 4 x 1 - 7.6/90, 6 - 533 TT (18, 4 bow, 2 stern) |
| Electronic equipment |
QB, JK sonars |
|
Complement |
63 |
|
Diving depth operational, m |
75 |
Project history: More close to the end of 1920th in the USA there was a withdrawal from usual earlier tendency to growth of displacement of submarines. Surface displacement up to 3000t ò of course allowed to ensure big endurance, but thus all remaining characteristics unfairly worsened. In 1927 the basic requirements to submarine for operations in the Eastern Pacific been prepared, according to which endurance was dropped to 12000nm, and self-sufficiency to 60 days. Speed admitted to less important characteristic, than manoeuvrability and torpedo armament. Simultaneously the artillery armament was considered possible to shrink to one 127mm gun. Surface displacement was limited at 1600t.
According to these requirements Dolphin project was prepared. The first attempt of creation of ocean patrol submarine was appeared not quite successful: Dolphin suffered insufficient hull strength, the endurance did not hold out to the design.
Double-hulled. Machinery contained two main diesels with direct drive and two diesel-generators for battery recharging. 102/50 gun soon after completion was replaced by lighter 76mm.
Modernizations: 1933 - 1934: - 1 x 1 - 102/50, 4 x 1 - 7.6/90; + 1 x 1 - 76/50 Mk 17/18, 2 x 1 - 12.7/90
late 1930s: - QB sonar; + QC, JG sonars
1940s: + SD, SJ radars
Naval service: No significant events.
Dolphin
© Ivan Gogin, 2014