P512 1942
| Name | No | Builder | Laid down | Launched | Comp | Fate |
| P511 (ex-SS80 R3) | P511 | Fore River, Quincy, USA | 12/1917 | 18/1/1919 | 4/1919 // 1/1941 | returned to USA 12/1944 |
| P512 (ex-SS94 R17) | P512 | Union Iron Wks, San Francisco, USA | 5/1917 | 24/12/1917 | 8/1918 // 3/1942 | returned to USA 9/1944 |
| P514 (ex-SS96 R19) | P514 | Union Iron Wks, San Francisco, USA | 6/1917 | 28/1/1918 | 10/1918 // 3/1942 | collision 21/6/1942 |
|
Displacement standard, t |
480 |
|
Displacement normal, t |
569 / 680 |
|
Length, m |
56.8 |
|
Breadth, m |
5.20 |
|
Draught, m |
4.00 |
|
No of shafts |
2 |
|
Machinery |
2 diesels / 2 electric motors |
|
Power, h. p. |
1200 / 940 |
|
Max speed, kts |
13.5 / 10.5 |
|
Fuel, t |
diesel oil 75 |
|
Endurance, nm(kts) |
3700(10) / |
|
Armament |
1 x 1 - 76/50 Mk 6 or 1 x 1 - 12.7/90, 4 - 533 TT (bow, 8) |
| Sensors | sonar |
|
Complement |
33 |
|
Diving depth operational, m |
60 |
Ship project history: Ex-US submarines, taken by lend-lease. Development of "O" class submarines with larger calibre of TT (533mm), 20 boats of the first group (R1-R20) built under Holland design. Saddle-tank.
Modernizations: None.
Naval service: P514 was lost 21/6/1942 in Atlantic. Two remaining are formally returned the USA in 1944, but handed over on demolition in Britain.
© Ivan Gogin, 2008-10