P-1 1939
| Name | No | Yard No | Builder | Laid down | Launched | Comp | Fate |
| Ï-1 [P-1] (ex-Ïðàâäà [Pravda]) | 218 | 189 Yd (Ordzhonikidze Yd), Leningrad | 5.1931 | 3.1.1934 | 6.1936 | sunk 9-17.9.1941 | |
| Ï-2 [P-2] (ex-Çâåçäà [Zvezda]), 6.1949- Á-31 [B-31] | 219 | 189 Yd (Ordzhonikidze Yd), Leningrad | 12.1931 | 15.4.1935 | 7.1936 | test ship 8.1944, TS 9.1951, hulk 8.1955 | |
| Ï-3 [P-3] (ex-Èñêðà [Iskra]), 6.1949- Á-1 [B-1] | 220 | 189 Yd (Ordzhonikidze Yd), Leningrad | 12.1931 | 4.12.1934 | 7.1936 | stricken 6.1952 |
|
Displacement standard, t |
|
|
Displacement normal, t |
955 / 1690 |
|
Length, m |
87.7 |
|
Breadth, m |
8.00 |
|
Draught, m |
2.91 |
|
No of shafts |
2 |
|
Machinery |
2 MAN M10V49/48 diesels / 2 PP84/95 electric motors |
|
Power, h. p. |
5400 / 1100 |
|
Max speed, kts |
18.8 / 6.5 |
|
Fuel, t |
diesel oil 92 |
| Endurance, nm(kts) | 5660(15.3) / 60(3.2) |
|
Armament |
2 x 1 - 100/49 B-24, 1 x 1 - 45/43 21K, 6 - 533 TT (4 bow, 2 stern, 10) |
| Electronic equipment | Merkuriy or Mars-A or Mars-DM or Mars-ShM hydrophone |
|
Complement |
56 |
|
Diving depth operational, m |
50 |
Project history: Fleet submarines,
intended for servcie with the surface fleet, attacks on landing forces as
self-supporting, and in interaction
with other submarines or coastal forces. The design assignment was given out in 1930. Priority was returned
to surface speed, corresponding to cruising speed of battleships, and armament. The demand
of minimum draught was thus made, the high freeboard became corollary of that.
Boats had double-hulled construction with external arrangement of
pressure hull frames (for the first time in Russian practice).
Light hull differed by characteristic "hump" amidships, creating
sinking moment in submerged position. On trials big diving time, shallow diving depth (no more than 70m), a
surface speed shortage and bad controllability in submerged position have come to light. Besides, because of unsuccessful construction of cutwaters
of bow TTs, after commission of boats it was necessary to shorten fore end that has led to decrease
of speed on 0.8kts. All it together brought battle value of IV series submarines to a minimum, and continuation of their building have refused.
Modernizations: 1939, all: CT was rebuilt
1940-1942, all survived: - hydrophone; + Mars-16 hydrophone
Naval service: In days of war they were used as transport and training submarines. P-1 was lost 10-11.9.1941 in Gulf of Finland, possibly on a mine.
P-3
© Ivan Gogin, 2009-14