L1 1915
| No | Name | Builder | Laid down | Launched | Comm | Fate |
| SS40 | L1, 1917- AL1, 1918- L1 | Fore River, Quincy | 4/1914 | 20/1/1915 | 4/1916 | sold 7/1922 |
| SS41 | L2, 1917- AL2, 1918- L2 | Fore River, Quincy | 3/1914 | 11/2/1915 | 9/1916 | sold 11/1933 |
| SS42 | L3, 1917- AL3, 1918- L3 | Fore River, Quincy | 4/1914 | 15/3/1915 | 4/1916 | sold 11/1933 |
| SS43 | L4, 1917- AL4, 1918- L4 | Fore River, Quincy | 3/1914 | 3/4/1915 | 5/1916 | stricken 4/1922 |
| SS44 | L5 | Lake, Bridgeport | 5/1914 | 1/5/1916 | 2/1918 | stricken 12/1922 |
| SS45 | L6 | Lake, Bridgeport | 5/1914 | 31/8/1916 | 12/1917 | stricken 11/1922 |
| SS46 | L7 | Lake, Bridgeport | 6/1914 | 28/9/1916 | 12/1917 | stricken 11/1922 |
| SS48 | L8 | Portsmouth N Yd | 2/1915 | 23/4/1917 | 8/1917 | stricken 11/1922 |
| SS49 | L9, 1917- AL9, 1918- L9 | Fore River, Quincy | 11/1914 | 27/10/1915 | 8/1916 | sold 11/1933 |
| SS50 | L10, 1917- AL10, 1918- L10 | Fore River, Quincy | 2/1915 | 16/3/1916 | 8/1916 | stricken 5/1922 |
| SS51 | L11, 1917- AL11, 1918- L11 | Fore River, Quincy | 2/1915 | 16/5/1916 | 8/1916 | stricken 12/1930 |
|
Displacement standard, t |
|
|
Displacement normal, t |
SS40 - 43, 49 - 51: 450 / 548 SS44 - 48: 456 / 524 |
|
Length, m |
SS40 - 43, 49 - 51: 51.0 SS44 - 48: 50.3 |
|
Breadth, m |
SS40 - 43, 49 - 51: 5.30 SS44 - 48: 4.50 |
|
Draught, m |
SS40 - 43, 49 - 51: 4.10 SS44 - 48: 4.00 |
|
No of shafts |
2 |
|
Machinery |
2 Busch-Sulzer diesels / 2 electric motors |
|
Power, h. p. |
1200 / 800 |
|
Max speed, kts |
14 / 10.5 |
|
Fuel, t |
diesel oil |
| Endurance, nm (kts) | 3300(11) / 150(5) |
|
Armament |
SS40 - 43, 49 - 51: 4 - 450 TT (bow, 8) SS44 - 48: 4 - 450 TT (bow, 8), 1 x 1 - 76/23 Mk 9 |
|
Complement |
28 |
|
Diving depth operational, m |
60 |
Ship project history: The first American boats with special disappearing gun mount. As well as the majority of others early American submarines, they appeared unsuccessful: 5 boats of class have not passed trials and have undergone to significant alterations.
Modernizations: none.
Naval service: L1-4, 9, 10 and 11 in 1917-1918 were based in Ireland.
L10 1916
© Ivan Gogin, 2008-10