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Russian Navy

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

UnitShipyardFleetChronologyNotes
#numberName Laid Down Launched Comm. Stricken
1B-94 SY 19610/03/1957 12/28/1957 12/25/1958 ----------
2B-95 SY 196---------- ---------- 09/30/1959 ----------
3B-37 SY 196---------- ---------- 11/05/1959 196201/11/1962 lost
4B-133 SY 196---------- ---------- 11/05/1959 ---------- 1970 redesignated to B-833
5B-135 SY 196---------- ---------- 11/05/1959 ----------
6B-139 SY 196---------- ---------- 03/15/1960 ----------
7B-57 SY 196---------- ---------- 07/28/1960 ----------
8B-116 SY 196---------- ---------- 08/25/1960 ----------
9B-130 SY 196---------- ---------- 09/22/1960 ----------
10B-143 SY 19610/21/1959 02/17/1960 11/05/1960 19941994 sold to Belgium
11B-85 SY 196---------- ---------- 12/23/1960 ----------
12B-156 SY 196---------- ---------- 04/18/1961 ----------
13B-59 SY 196---------- ---------- 06/10/1961 ----------
14B-4 Chelyabinky Komsomolets SY 196---------- ---------- 08/31/1961 ---------- 01/18/1963 named
15B-153 SY 196---------- ---------- 09/30/1961 ----------
16B-164 SY 196---------- ---------- 10/16/1961 ----------
17B-33 SY 196---------- ---------- 11/27/1961 199101/26/1991 lost
18B-7 SY 196---------- ---------- 12/15/1961 ----------
19B-105 SY 196---------- ---------- 06/15/1962 ----------
20B-169 SY 196---------- ---------- 07/28/1962 ----------
21B-38 SY 196---------- ---------- 09/30/1962 ----------
22B-53 SY 196---------- ---------- 11/05/1962 ----------
23B-50 SY 196---------- ---------- 12/08/1962 ----------
24B-8 SY 196---------- ---------- 12/18/1962 ----------
25B-31 SY 196---------- ---------- 06/25/1963 ----------
26B-2 SY 196---------- ---------- 07/14/1963 ----------
27B-55 SY 196---------- ---------- 09/20/1963 ---------- 1970 redesignated to B-855
28B-98 SY 196---------- ---------- 05/15/1964 ----------
29B-101 SY 196---------- ---------- 05/29/1964 ----------
30B-6 SY 196---------- ---------- 07/30/1964 ----------
31B-15 SY 19610/10/1963 02/21/1964 09/30/1964 19921992 sold to Canada as scrap
32B-103 SY 196---------- ---------- 12/24/1964 ----------
33B-109 SY 196---------- ---------- 04/15/1965 ----------
34B-107 SY 196---------- ---------- 04/28/1965 ----------
35B-112 SY 196---------- ---------- 08/05/1965 ----------
36B-25 SY 196---------- ---------- 09/06/1965 ----------
37B-21 SY 196---------- ---------- 10/31/1965 ----------
38B-9 SY 196---------- ---------- 11/30/1965 ----------
39B-26 Yaroslavsky Komsomolets SY 196---------- ---------- 03/24/1966 ---------- 02/15/1965 named
40B-28 SY 196---------- ---------- 06/18/1966 ----------
41B-34 SY 196---------- ---------- 08/31/1966 ----------
42B-40 SY 196---------- ---------- 09/06/1966 ----------
43B-29 SY 196---------- ---------- 11/28/1966 ----------
44B-41 SY 196---------- ---------- 12/24/1966 ----------
45B-46 SY 196---------- ---------- 06/30/1967 ----------
46B-49 Valdimirsky Komsomolets SY 196---------- ---------- 06/30/1967 ---------- 09/23/1967 named
47B-39 SY 19602/09/1962 04/15/1967 12/28/1967 04/01/1994 1994 sold to Finland
48B-397 SY 196---------- ---------- 12/31/1967 ----------
49B-400 SY 196---------- ---------- 09/25/1968 ----------
50B-413 SY 19606/28/1968 10/07/1968 12/25/1968 19992000 display at Kaliningrad
51B-416 SY 196---------- ---------- 12/04/1969 ----------
52B-205 SY 196---------- ---------- 12/28/1969 ----------
53B-213 SY 196---------- ---------- 08/11/1970 ----------
54B-435 SY 196---------- ---------- 11/06/1970 ----------
55B-440 SY 196---------- ---------- 12/25/1970 ----------
56B-409 SY 196---------- ---------- 09/10/1971 ----------
57B-427 "Scorpion" SY 19604/10/1971 06/22/1971 12/04/1971 19941994 sold to Australia
On display in California
58 SY 196---------- ---------- ---------- ----------
59 SY 196---------- ---------- ---------- ----------
60 SY 196---------- ---------- ---------- ----------
61B-807 SY 196---------- ---------- ---------- ----------
62B-213 SY 196---------- ---------- ---------- ----------
Project 641I, NATO code "Foxtrot"(export type)
1B-51 SY 196---------- ---------- 10/26/1967 ---------- 04/1968 to India
2B-401 SY 196---------- ---------- 09/19/1968 ---------- 03/1969 to India
3B-405 SY 196---------- ---------- 07/02/1969 ---------- 11/1969 to India
4B-402 SY 196---------- ---------- 09/05/1969 ---------- 02/1970 to India
5B-456 SY 196---------- ---------- 10/10/1972 ---------- 11/1973 to India
6B-470 SY 196---------- ---------- 07/05/1973 ---------- 12/1973 to India
7B-464 SY 196---------- ---------- 12/16/1973 ---------- 10/1974 to India
8B-522 SY 196---------- ---------- 09/20/1974 ---------- 02/1975 to India
9B-311 SY 196---------- ---------- 02/11/1978 ---------- 12/1976 to Libya
10B-330 SY 196---------- ---------- 10/27/1977 ---------- 02/1978 to Libya
11B-533 SY 196---------- ---------- 10/08/1976 ---------- 02/1978 to Libya
12B-587 SY 196---------- ---------- 10/25/1981 ---------- 02/1981 to Libya
13B-588 SY 196---------- ---------- 09/28/1982 ---------- 01/1982 to Lybia
14B-590 SY 196---------- ---------- 11/21/1980 ---------- 02/1983 to Libya
Project 641K, NATO code "Foxtrot"(export type)
1B-309 SY 196---------- ---------- 12/10/1978 ---------- 02/07/1979 to Cuba
2B-586 SY 196---------- ---------- 11/30/1979 ---------- 03/1980 to Cuba
3B-510 SY 196---------- ---------- 10/20/1983 ---------- 02/1984 to Cuba

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