B.1
| Name | No | Yard No | Builder | Laid down | Launched | Comp | Fate |
| Á.1 [B.1] | Baltic Wks, Petrograd | 1917 | --- | --- | suspended 1918 | ||
| Á.2 [B.2] | Baltic Wks, Petrograd | 1917 | --- | --- | suspended 1918 | ||
| Á.3 [B.3] | Baltic Wks, Petrograd | 1917 | --- | --- | suspended 1918 | ||
| Á.4 [B.4] | Baltic Wks, Petrograd | 1917 | --- | --- | suspended 1918 |
|
Displacement standard, t |
|
|
Displacement normal, t |
971 / 1264 |
|
Length, m |
80.5 |
|
Breadth, m |
7.00 |
|
Draught, m |
4.00 |
|
No of shafts |
2 |
|
Machinery |
2 diesels / 2 electric motors |
|
Power, h. p. |
2640 / 740 |
|
Max speed, kts |
17 / 9 |
|
Fuel, t |
diesel oil |
| Endurance, nm(kts) | 3000(10) / 100(5) |
|
Armament |
2 x 1 - 102/33 Obukhov, 1 x 1 - 57/50 Hotchkiss, 16 - 450 TT (4 bow, 2 stern, 4 beam, 6 ext drop-collars, 20) |
|
Complement |
49 |
| Diving depth operational, m | 45 |
Project history: Part of the 1916 Submarine Programme, designated for the Baltic Fleet. Bubnov design, influenced by the Holland ones and therefore included such innovations as a double hull and subdivision into 8 watertight compartments. Four of her TT were transversally sited. Ordered 1916, construction begun 1916-17 but abandoned after the Bolshevik Revolution.
© Ivan Gogin, 2014