Project 641 Foxtrot class

The Project 641 (Foxtrot) submarines were derivatives of the Whiskey and Romeo class diesel boats. They featured larger ammunition load, endurance and range. The Foxtrot, the Soviet Navy's largest conventional submarine, could travel 16,000 nautical miles before having to refuel. They were capable of performing underwater operations continuously for four days, after which they had to rise to 7 metres (snorkel depth) to change the air and charge the batteries. Three diesel engines generate power for electric motors that drive the 3 propellers. At periscope depth, air for the diesels can be sucked from the surface using a snorkel.

The Foxtrot operated at a depth of 250 meters, could dive to over 300 meters and was capable of reaching 16.8 knots. To surface, compressed air from 56 bottles expels the water from the the ballast tanks. The Foxtrot dives and surfaces quite horizontally. At more that 30 degrees it loses control. Only officers had their own bunks. Ordinary sailors "hot bunked." 27 bunks in the aft torpedo room were shared by 54 crew! 3 shifts per day: duty, maintenance and sleep.

A total of 74 [an perhaps as many as 79] Foxtrots were built begining in 1958 for both the Soviet Navy and others countries including India, Libya, Cuba and Poland. The USSR started to export these submarines (modifications I641 and I641K) in the mid-1960s. A total of at least 57 and and as many as 62 units were believed to have been built for the Soviet Navy until 1967. Historically there were more than ten Foxtrots in the Baltic Fleet (numerically the largest fleet in the Russian navy); today there are none. Reportedly by early-2000 only three boats of this class remain in service, though the identity of these units is somewhat obscure, and they are expected to be retired shortly.

Specifications
Russian Designator:	Project 641
NATO Designator:	Foxtrot-Class
Length:	299 feet, 6 inches
Beam:	24 feet, 7 inches
Draft:	20 feet
Displacement:	1,952 tons surfaced, 2,475 tons submerged
Construction:	3/8 inch outer light hull comprising ballast tanks. 7/8 inch QT28 Nickel Steel pressure hull.
Complement:	12 officers 10 midshipmen 56 seamen
Maximum Diving Depth:	985 feet
Speed:	16 knots surfaced 15 knots submerged 9 knots snorkeling
Range:	20,000 miles surfaced at 8 knots, 11,000 miles snorkeling 380 miles submerged at 2 knots
Endurance:	3 - 5 days submerged
Propulsion:	3 x Kolomna 2D42M diesel engines, 2,000 hp each. 3 x electric motors; 2 with 1,350 hp and 1 with 2,700 hp. 1 x auxiliary motor with 180 hp. 3 x propeller shafts, each with 6 bladed propellers.
Torpedoes:	22 maximum
Radar:	Surface search: Snoop Tray; I band.
Sonar:	Herkules medium-frequency active/passive. Feniks passive search/attack.
Electronic warfare:	Stop Light, Radar Warning. Quad Loop Directional Finder.

Class Listing

Unit Shipyard Fleet Chronology Notes

# number Name Laid Down Launched Comm. Stricken

1 B-94 SY 196 10/03/1957 12/28/1957 12/25/1958 ----------

2 B-95 SY 196 ---------- ---------- 09/30/1959 ----------

3 B-37 SY 196 ---------- ---------- 11/05/1959 1962 01/11/1962 lost

4 B-133 SY 196 ---------- ---------- 11/05/1959 ---------- 1970 redesignated to B-833

5 B-135 SY 196 ---------- ---------- 11/05/1959 ----------

6 B-139 SY 196 ---------- ---------- 03/15/1960 ----------

7 B-57 SY 196 ---------- ---------- 07/28/1960 ----------

8 B-116 SY 196 ---------- ---------- 08/25/1960 ----------

9 B-130 SY 196 ---------- ---------- 09/22/1960 ----------

10 B-143 SY 196 10/21/1959 02/17/1960 11/05/1960 1994 1994 sold to Belgium

11 B-85 SY 196 ---------- ---------- 12/23/1960 ----------

12 B-156 SY 196 ---------- ---------- 04/18/1961 ----------

13 B-59 SY 196 ---------- ---------- 06/10/1961 ----------

14 B-4 Chelyabinky Komsomolets SY 196 ---------- ---------- 08/31/1961 ---------- 01/18/1963 named

15 B-153 SY 196 ---------- ---------- 09/30/1961 ----------

16 B-164 SY 196 ---------- ---------- 10/16/1961 ----------

17 B-33 SY 196 ---------- ---------- 11/27/1961 1991 01/26/1991 lost

18 B-7 SY 196 ---------- ---------- 12/15/1961 ----------

19 B-105 SY 196 ---------- ---------- 06/15/1962 ----------

20 B-169 SY 196 ---------- ---------- 07/28/1962 ----------

21 B-38 SY 196 ---------- ---------- 09/30/1962 ----------

22 B-53 SY 196 ---------- ---------- 11/05/1962 ----------

23 B-50 SY 196 ---------- ---------- 12/08/1962 ----------

24 B-8 SY 196 ---------- ---------- 12/18/1962 ----------

25 B-31 SY 196 ---------- ---------- 06/25/1963 ----------

26 B-2 SY 196 ---------- ---------- 07/14/1963 ----------

27 B-55 SY 196 ---------- ---------- 09/20/1963 ---------- 1970 redesignated to B-855

28 B-98 SY 196 ---------- ---------- 05/15/1964 ----------

29 B-101 SY 196 ---------- ---------- 05/29/1964 ----------

30 B-6 SY 196 ---------- ---------- 07/30/1964 ----------

31 B-15 SY 196 10/10/1963 02/21/1964 09/30/1964 1992 1992 sold to Canada as scrap

32 B-103 SY 196 ---------- ---------- 12/24/1964 ----------

33 B-109 SY 196 ---------- ---------- 04/15/1965 ----------

34 B-107 SY 196 ---------- ---------- 04/28/1965 ----------

35 B-112 SY 196 ---------- ---------- 08/05/1965 ----------

36 B-25 SY 196 ---------- ---------- 09/06/1965 ----------

37 B-21 SY 196 ---------- ---------- 10/31/1965 ----------

38 B-9 SY 196 ---------- ---------- 11/30/1965 ----------

39 B-26 Yaroslavsky Komsomolets SY 196 ---------- ---------- 03/24/1966 ---------- 02/15/1965 named

40 B-28 SY 196 ---------- ---------- 06/18/1966 ----------

41 B-34 SY 196 ---------- ---------- 08/31/1966 ----------

42 B-40 SY 196 ---------- ---------- 09/06/1966 ----------

43 B-29 SY 196 ---------- ---------- 11/28/1966 ----------

44 B-41 SY 196 ---------- ---------- 12/24/1966 ----------

45 B-46 SY 196 ---------- ---------- 06/30/1967 ----------

46 B-49 Valdimirsky Komsomolets SY 196 ---------- ---------- 06/30/1967 ---------- 09/23/1967 named

47 B-39 SY 196 02/09/1962 04/15/1967 12/28/1967 04/01/1994 1994 sold to Finland

48 B-397 SY 196 ---------- ---------- 12/31/1967 ----------

49 B-400 SY 196 ---------- ---------- 09/25/1968 ----------

50 B-413 SY 196 06/28/1968 10/07/1968 12/25/1968 1999 2000 display at Kaliningrad

51 B-416 SY 196 ---------- ---------- 12/04/1969 ----------

52 B-205 SY 196 ---------- ---------- 12/28/1969 ----------

53 B-213 SY 196 ---------- ---------- 08/11/1970 ----------

54 B-435 SY 196 ---------- ---------- 11/06/1970 ----------

55 B-440 SY 196 ---------- ---------- 12/25/1970 ----------

56 B-409 SY 196 ---------- ---------- 09/10/1971 ----------

57 B-427 "Scorpion" SY 196 04/10/1971 06/22/1971 12/04/1971 1994 1994 sold to Australia
On display in California

58 SY 196 ---------- ---------- ---------- ----------

59 SY 196 ---------- ---------- ---------- ----------

60 SY 196 ---------- ---------- ---------- ----------

61 B-807 SY 196 ---------- ---------- ---------- ----------

62 B-213 SY 196 ---------- ---------- ---------- ----------

Project 641I, NATO code "Foxtrot"(export type)

1 B-51 SY 196 ---------- ---------- 10/26/1967 ---------- 04/1968 to India

2 B-401 SY 196 ---------- ---------- 09/19/1968 ---------- 03/1969 to India

3 B-405 SY 196 ---------- ---------- 07/02/1969 ---------- 11/1969 to India

4 B-402 SY 196 ---------- ---------- 09/05/1969 ---------- 02/1970 to India

5 B-456 SY 196 ---------- ---------- 10/10/1972 ---------- 11/1973 to India

6 B-470 SY 196 ---------- ---------- 07/05/1973 ---------- 12/1973 to India

7 B-464 SY 196 ---------- ---------- 12/16/1973 ---------- 10/1974 to India

8 B-522 SY 196 ---------- ---------- 09/20/1974 ---------- 02/1975 to India

9 B-311 SY 196 ---------- ---------- 02/11/1978 ---------- 12/1976 to Libya

10 B-330 SY 196 ---------- ---------- 10/27/1977 ---------- 02/1978 to Libya

11 B-533 SY 196 ---------- ---------- 10/08/1976 ---------- 02/1978 to Libya

12 B-587 SY 196 ---------- ---------- 10/25/1981 ---------- 02/1981 to Libya

13 B-588 SY 196 ---------- ---------- 09/28/1982 ---------- 01/1982 to Lybia

14 B-590 SY 196 ---------- ---------- 11/21/1980 ---------- 02/1983 to Libya

Project 641K, NATO code "Foxtrot"(export type)

1 B-309 SY 196 ---------- ---------- 12/10/1978 ---------- 02/07/1979 to Cuba

2 B-586 SY 196 ---------- ---------- 11/30/1979 ---------- 03/1980 to Cuba

3 B-510 SY 196 ---------- ---------- 10/20/1983 ---------- 02/1984 to Cuba

Class Listing
Unit	Shipyard	Fleet	Chronology	Notes
#	number	Name	Laid Down	Launched	Comm.	Stricken
1	B-94		SY 196		10/03/1957	12/28/1957	12/25/1958	----------
2	B-95		SY 196		----------	----------	09/30/1959	----------
3	B-37		SY 196		----------	----------	11/05/1959	1962	01/11/1962 lost
4	B-133		SY 196		----------	----------	11/05/1959	----------	1970 redesignated to B-833
5	B-135		SY 196		----------	----------	11/05/1959	----------
6	B-139		SY 196		----------	----------	03/15/1960	----------
7	B-57		SY 196		----------	----------	07/28/1960	----------
8	B-116		SY 196		----------	----------	08/25/1960	----------
9	B-130		SY 196		----------	----------	09/22/1960	----------
10	B-143		SY 196		10/21/1959	02/17/1960	11/05/1960	1994	1994 sold to Belgium
11	B-85		SY 196		----------	----------	12/23/1960	----------
12	B-156		SY 196		----------	----------	04/18/1961	----------
13	B-59		SY 196		----------	----------	06/10/1961	----------
14	B-4	Chelyabinky Komsomolets	SY 196		----------	----------	08/31/1961	----------	01/18/1963 named
15	B-153		SY 196		----------	----------	09/30/1961	----------
16	B-164		SY 196		----------	----------	10/16/1961	----------
17	B-33		SY 196		----------	----------	11/27/1961	1991	01/26/1991 lost
18	B-7		SY 196		----------	----------	12/15/1961	----------
19	B-105		SY 196		----------	----------	06/15/1962	----------
20	B-169		SY 196		----------	----------	07/28/1962	----------
21	B-38		SY 196		----------	----------	09/30/1962	----------
22	B-53		SY 196		----------	----------	11/05/1962	----------
23	B-50		SY 196		----------	----------	12/08/1962	----------
24	B-8		SY 196		----------	----------	12/18/1962	----------
25	B-31		SY 196		----------	----------	06/25/1963	----------
26	B-2		SY 196		----------	----------	07/14/1963	----------
27	B-55		SY 196		----------	----------	09/20/1963	----------	1970 redesignated to B-855
28	B-98		SY 196		----------	----------	05/15/1964	----------
29	B-101		SY 196		----------	----------	05/29/1964	----------
30	B-6		SY 196		----------	----------	07/30/1964	----------
31	B-15		SY 196		10/10/1963	02/21/1964	09/30/1964	1992	1992 sold to Canada as scrap
32	B-103		SY 196		----------	----------	12/24/1964	----------
33	B-109		SY 196		----------	----------	04/15/1965	----------
34	B-107		SY 196		----------	----------	04/28/1965	----------
35	B-112		SY 196		----------	----------	08/05/1965	----------
36	B-25		SY 196		----------	----------	09/06/1965	----------
37	B-21		SY 196		----------	----------	10/31/1965	----------
38	B-9		SY 196		----------	----------	11/30/1965	----------
39	B-26	Yaroslavsky Komsomolets	SY 196		----------	----------	03/24/1966	----------	02/15/1965 named
40	B-28		SY 196		----------	----------	06/18/1966	----------
41	B-34		SY 196		----------	----------	08/31/1966	----------
42	B-40		SY 196		----------	----------	09/06/1966	----------
43	B-29		SY 196		----------	----------	11/28/1966	----------
44	B-41		SY 196		----------	----------	12/24/1966	----------
45	B-46		SY 196		----------	----------	06/30/1967	----------
46	B-49	Valdimirsky Komsomolets	SY 196		----------	----------	06/30/1967	----------	09/23/1967 named
47	B-39		SY 196		02/09/1962	04/15/1967	12/28/1967	04/01/1994	1994 sold to Finland
48	B-397		SY 196		----------	----------	12/31/1967	----------
49	B-400		SY 196		----------	----------	09/25/1968	----------
50	B-413		SY 196		06/28/1968	10/07/1968	12/25/1968	1999	2000 display at Kaliningrad
51	B-416		SY 196		----------	----------	12/04/1969	----------
52	B-205		SY 196		----------	----------	12/28/1969	----------
53	B-213		SY 196		----------	----------	08/11/1970	----------
54	B-435		SY 196		----------	----------	11/06/1970	----------
55	B-440		SY 196		----------	----------	12/25/1970	----------
56	B-409		SY 196		----------	----------	09/10/1971	----------
57	B-427	"Scorpion"	SY 196		04/10/1971	06/22/1971	12/04/1971	1994	1994 sold to Australia On display in California
58			SY 196		----------	----------	----------	----------
59			SY 196		----------	----------	----------	----------
60			SY 196		----------	----------	----------	----------
61	B-807		SY 196		----------	----------	----------	----------
62	B-213		SY 196		----------	----------	----------	----------
Project 641I, NATO code "Foxtrot"(export type)
1	B-51		SY 196		----------	----------	10/26/1967	----------	04/1968 to India
2	B-401		SY 196		----------	----------	09/19/1968	----------	03/1969 to India
3	B-405		SY 196		----------	----------	07/02/1969	----------	11/1969 to India
4	B-402		SY 196		----------	----------	09/05/1969	----------	02/1970 to India
5	B-456		SY 196		----------	----------	10/10/1972	----------	11/1973 to India
6	B-470		SY 196		----------	----------	07/05/1973	----------	12/1973 to India
7	B-464		SY 196		----------	----------	12/16/1973	----------	10/1974 to India
8	B-522		SY 196		----------	----------	09/20/1974	----------	02/1975 to India
9	B-311		SY 196		----------	----------	02/11/1978	----------	12/1976 to Libya
10	B-330		SY 196		----------	----------	10/27/1977	----------	02/1978 to Libya
11	B-533		SY 196		----------	----------	10/08/1976	----------	02/1978 to Libya
12	B-587		SY 196		----------	----------	10/25/1981	----------	02/1981 to Libya
13	B-588		SY 196		----------	----------	09/28/1982	----------	01/1982 to Lybia
14	B-590		SY 196		----------	----------	11/21/1980	----------	02/1983 to Libya
Project 641K, NATO code "Foxtrot"(export type)
1	B-309		SY 196		----------	----------	12/10/1978	----------	02/07/1979 to Cuba
2	B-586		SY 196		----------	----------	11/30/1979	----------	03/1980 to Cuba
3	B-510		SY 196		----------	----------	10/20/1983	----------	02/1984 to Cuba

Sources and Resources

Pr. #641 plus variants NATO Code 'Foxtrot' @ warships1.com
Russian Submarines @ World Navies Today
Russian Submarine List @ Steel in the Deep Submarine Site
Foxtrot design @ USNI Military Database
Foxtrot class @ USNI Military Database
Foxtrot class @ USNI Military Database
Foxtrot design @ USNI Military Database
Foxtrot class @ USNI Military Database

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Project 641 Foxtrot class

Specifications

Class Listing

Sources and Resources

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