M-255 submarines (project A-615) (1955 - 1957)
M-361 submarine (project 637)
M-321 1960
M-361
| Name | No | Yard No | Builder | Laid down | Launched | Comp | Fate |
| Project 615 | |||||||
| Ì-254 [M-254] | 579 | 196 Yd (Sudomekh), Leningrad | 17.3.1950 | 31.8.1950 | 31.5.1953 | training hulk 1959 | |
| Project A615 | |||||||
| Ì-255 [M-255] | 664 | 196 Yd (Sudomekh), Leningrad | 8.9.1953 | 16.9.1954 | 10.12.1955 | stricken 3.1968 | |
| Ì-256 [M-256] | 665 | 196 Yd (Sudomekh), Leningrad | 23.9.1953 | 15.9.1954 | 21.12.1955 | fire 26.9.1957 | |
| Ì-257 [M-257] | 666 | 196 Yd (Sudomekh), Leningrad | 10.11.1953 | 30.9.1954 | 10.12.1955 | test hulk 2.1958 | |
| Ì-258 [M-258] | 667 | 196 Yd (Sudomekh), Leningrad | 18.11.1953 | 4.11.1954 | 21.12.1955 | stricken 12.1966 | |
| Ì-259 [M-259] | 668 | 196 Yd (Sudomekh), Leningrad | 12.1.1954 | 5.11.1954 | 13.12.1955 | stricken 9.1972 | |
| Ì-260 [M-260] | 669 | 196 Yd (Sudomekh), Leningrad | 14.2.1954 | 21.5.1955 | 31.7.1956 | stricken 1.1970 | |
| Ì-261 [M-261], 6.1978- ÌÑ-261 [MS-261] | 1070 | 196 Yd (Sudomekh), Leningrad | 23.2.1954 | 21.5.1955 | 31.7.1956 | stricken 5.1980, preserved | |
| Ì-262 [M-262] | 1071 | 196 Yd (Sudomekh), Leningrad | 20.3.1954 | 12.7.1955 | 31.7.1956 | stricken 1.1970 | |
| Ì-263 [M-263] | 1072 | 196 Yd (Sudomekh), Leningrad | 8.4.1954 | 2.8.1955 | 2.11.1956 | stricken 6.1976 | |
| Ì-264 [M-264] | 1073 | 196 Yd (Sudomekh), Leningrad | 4.6.1954 | 14.9.1955 | 3.10.1956 | stricken 7.1977 | |
| Ì-265 [M-265] | 1074 | 196 Yd (Sudomekh), Leningrad | 15.7.1954 | 9.9.1955 | 30.9.1956 | stricken 1978 | |
| Ì-266 [M-266], 8.1977- ÌÑ-266 [MS-266] | 1075 | 196 Yd (Sudomekh), Leningrad | 30.8.1954 | 30.10.1955 | 30.9.1956 | stricken 1979 | |
| Ì-267 [M-267] | 1078 | 196 Yd (Sudomekh), Leningrad | 15.10.1954 | 14.1.1956 | 30.9.1956 | stricken 1980 | |
| Ì-268 [M-268] | 1079 | 196 Yd (Sudomekh), Leningrad | 20.11.1954 | 16.4.1956 | 26.12.1956 | stricken 1980 | |
| Ì-269 [M-269], 8.1977- ÌÑ-269 [MS-269] | 1080 | 196 Yd (Sudomekh), Leningrad | 30.11.1954 | 17.3.1956 | 27.8.1957 | stricken 1980 | |
| Ì-295 [M-295] | 701 | 196 Yd (Sudomekh), Leningrad | 10.1.1955 | 3.4.1956 | 16.8.1957 | stricken 1973 | |
| Ì-296 [M-296], 8.1977- ÌÑ-296 [MS-296] | 702 | 196 Yd (Sudomekh), Leningrad | 1.2.1955 | 4.4.1956 | 23.12.1958 | stricken 6.1979, preserved | |
| Ì-297 [M-297] | 703 | 196 Yd (Sudomekh), Leningrad | 5.8.1955 | 29.7.1956 | 29.8.1957 | stricken 9.1975 | |
| Ì-298 [M-298] | 704 | 196 Yd (Sudomekh), Leningrad | 2.8.1955 | 30.6.1956 | 31.8.1957 | stricken 1975 | |
| Ì-299 [M-299] | 705 | 196 Yd (Sudomekh), Leningrad | 19.9.1955 | 4.10.1956 | 30.11.1957 | stricken 1978 | |
| Ì-300 [M-300] | 711 | 196 Yd (Sudomekh), Leningrad | 27.9.1955 | 12.10.1956 | 30.11.1957 | stricken 1976 | |
| Ì-301 [M-301] | 713 | 196 Yd (Sudomekh), Leningrad | 7.1.1956 | 23.2.1957 | 27.12.1958 | stricken 1979 | |
| Ì-321 [M-321], 7.1980- ÌÑ-321 [MS-321] | 715 | 196 Yd (Sudomekh), Leningrad | 24.12.1955 | 23.2.1957 | 23.12.1958 | stricken 1981 | |
| Ì-351 [M-351] | 801 | 194 Marti Yd, Leningrad | 24.3.1954 | 4.7.1955 | 3.8.1956 | stricken 1974 | |
| Ì-352 [M-352] | 802 | 194 Marti Yd, Leningrad | 10.4.1954 | 7.10.1955 | 30.9.1956 | stricken 5.1980 | |
| Ì-353 [M-353], 5.1978- ÌÑ-353 [MS-353] | 803 | 194 Marti Yd, Leningrad | 15.5.1955 | 26.4.1956 | 30.9.1956 | stricken 1.1980 | |
| Ì-354 [M-354], 6.1979- ÌÑ-354 [MS-354] | 804 | 194 Marti Yd, Leningrad | 23.6.1955 | 5.6.1956 | 25.11.1956 | stricken 1979 | |
| Ì-355 [M-355] | 805 | 194 Marti Yd, Leningrad | 8.7.1955 | 17.4.1957 | 1.8.1957 | stricken 1980 | |
| Ì-356 [M-356] | 816 | 194 Marti Yd, Leningrad | 5.4.1956 | 27.4.1957 | 20.8.1957 | stricken 1974 | |
| Project 637 | |||||||
| Ì-361 [M-361] | 817 | 194 Marti Yd, Leningrad | 5.1955 | 3.1957 | --- | never completed | |
| Data variant | pr. 615, A-615 |
|
Displacement standard, t |
|
|
Displacement normal, t |
pr. 615: 392 / 493 pr. A615: 406 / 504 |
|
Length, m |
pr. 615: 56.6 pr. A615: 56.8 |
|
Breadth, m |
pr. 615: 4.44 pr. A615: 4.46 |
|
Draught, m |
pr. 615: 2.78 pr. A615: 3.59 |
|
No of shafts |
3 |
|
Machinery |
pr. 615: 1 32D AIP diesel + 2 M-50 diesels / 1 32D AIP diesel / 1 PG-106 electric motor for cruising pr. A615: 1 32D AIP diesel + 2 M-50P diesels / 1 32D AIP diesel / 1 PG-106 electric motor for cruising |
|
Power, h. p. |
pr. 615: 2300 (900+2x700) / 900 / 100 pr. A615: 2700 (900+2x900) / 900 / 100 |
|
Max speed, kts |
pr. 615: 17.2 / 15.4 pr. A615: 16.1 / 15 |
|
Fuel, t |
diesel oil |
|
Endurance, nm(kts) |
pr. 615: 1700(9.1) / 325(2.5) pr. A615: 3150(8.3) / 410(3.5) |
|
Armament |
pr. 615: 1 x 2 - 25/112 2M-8, 4 - 533 TT (bow, 4) pr. A615 completed 1955-56: 1 x 2 - 25/112 2M-8, 4 - 533 TT (bow, 4) pr. A615 completed 1956-58: 4 - 533 TT (bow, 4) |
|
Electronic equipment |
Flag radar, Tamir-5L, Mars-16KIG sonars |
|
Complement |
pr. 615: 29 pr. A615: 41 |
|
Diving depth operational, m |
100 |
| Data variant | pr. 637 |
|
Displacement standard, t |
|
|
Displacement normal, t |
425 / 680 |
|
Length, m |
58.2 |
|
Breadth, m |
4.46 |
|
Draught, m |
3.45 |
|
No of shafts |
3 |
|
Machinery |
1 32D AIP diesel + 2 M-50P diesels / 1 32D AIP diesel / 1 PG-106 electric motor for cruising |
|
Power, h. p. |
2700 (900+2x900) / 900 / 100 |
|
Max speed, kts |
16 / 15 |
|
Fuel, t |
diesel oil |
|
Endurance, nm(kts) |
2700(8) / 350(3.5) |
|
Armament |
4 - 533 TT (bow, 4) |
|
Electronic equipment |
Flag radar, Tamir-5L, Mars-16KIG sonars |
|
Complement |
33 |
|
Diving depth operational, m |
100 |
Project history: This closed cycle ('single propulsion system', in Soviet parlance) design was chosen in preference to the conventional Project 612 as successor to the earlier M-classes. Project 615 was by TsKB-18; the production A615 was by TsKB-16 (the chief designer, Kassatier, apparently transferred to TsKB-16) The Kreislauf powerplant, derived from prewar experiments, ran submerged n an internal supply of liquid oxygen; oxygen was added after exhaust was passed through a lime chemical absorbent (ED KhPI). The submarine could also use a snorkel. There were three engines: one 32D diesel (900bhp) on the centre shaft, plus a pair of 700/900bhp M-50/M-50P diesels (a type used on torpedo boats), with a 100hp creep motor on the centre shaft and a back-up diesel generator aft. Boats could run at low speed using only the centreline diesel.
Because liquid oxygen could be stored for only a limited period, the boat could not operate far from a base. To overcome this problem, in 1954-55 the Project 637 submarine was designed to use a new 'B-2 single product', consisting of solid granules containing bonded oxygen and a carbon dioxide absorbent. Exhaust gas passed through it would have its carbon dioxide leached out while its oxygen content was renewed. In 1958-59 M-361, then under oh construction, was retrofitted to test B-2, but in 1960 her trial programme was stopped and closed-cycle work ended because of the success of the nuclear programme.
Modernizations: None.
Naval service: M-256 was lost 26.9.1957 off Tallin due to fire.
Pr. A615 1970
© Ivan Gogin, 2015