E1 1912
| No | Name | Yard No | Builder | Laid down | Launched | Comm | Fate |
| SS24 | E1 (ex-Skipjack) | 179 | Fore River, Quincy | 12/1909 | 27.5.1911 | 2.1912 | stricken 10.1921 |
| SS25 | E2 (ex-Sturgeon) | 180 | Fore River, Quincy | 12/1909 | 15.6.1911 | 2.1912 | stricken 10.1921 |
|
Displacement standard, t |
|
|
Displacement normal, t |
287 / 342 |
|
Length, m |
41.2 |
|
Breadth, m |
4.40 |
|
Draught, m |
3.60 |
|
No of shafts |
2 |
|
Machinery |
2 NLSE diesels / 2 electric motors |
|
Power, h. p. |
700 / 600 |
|
Max speed, kts |
13.5 / 11.5 |
|
Fuel, t |
diesel oil 25 |
| Endurance, nm(kts) | 2100 (11) / 100 (5) |
|
Armament |
4 - 450 TT (bow, 4) |
|
Complement |
20 |
|
Diving depth operational, m |
60 |
Project history: In these submarines the growth in size was reversed; the Submarine Flotilla considered them a 'reversion of type without justification'. They were the first US submarines with diesel engines, which gave considerable trouble; they had to be re-engined in 1915. They also were the first in USN with bow planes, and first USN submarines with radios. This class showed a typical pre-1917 American concentration on high underwater speed, which continued through the 'S' class of World War One.
Modernizations: None.
Naval service: No significant events.
© Ivan Gogin, 2014