German submarine U-639

German World War II submarine

History

Nazi Germany
Name	U-639
Ordered	20 January 1941
Builder	Blohm & Voss, Hamburg
Yard number	615
Laid down	31 October 1941
Launched	22 July 1942
Commissioned	10 September 1942
Fate	Torpedoed and sunk by the Soviet submarine S-101 in the Kara Sea on 28 August 1943
General characteristics
Class and type	Type VIIC U-boat
Displacement	769 tonnes (757 long tons) surfaced 871 t (857 long tons) submerged
Length	67.10 m (220.1 ft) o/a 50.50 m (165.7 ft) pressure hull
Beam	6.20 m (20.3 ft) o/a 4.70 m (15.4 ft) pressure hull
Draught	4.74 m (15.6 ft)
Propulsion	3,200 PS (2,400 kW; 3,200 bhp) surfaced 750 PS (550 kW; 740 shp) submerged
Speed	17.7 knots (32.8 km/h; 20.4 mph) surfaced 7.6 knots (14.1 km/h; 8.7 mph) submerged
Range	8,500 nmi (15,700 km; 9,800 mi) at 10 knots (19 km/h; 12 mph) surfaced 80 nmi (150 km; 92 mi) at 4 knots (7.4 km/h; 4.6 mph) submerged
Test depth	Calculated crush depth: 220 m (720 ft)
Complement	4 officers, 40–56 enlisted
Armament	5 × 53.3 cm (21 in) torpedo tubes (four bow, one stern) 14 × torpedoes or 26 TMA mines 1 × 8.8 cm (3.46 in) deck gun (220 rounds) 1 × twin 2 cm (0.79 in) C/30 anti-aircraft gun
Service record
Part of:	5th U-boat Flotilla 10 September 1942 – 31 March 1943 11th U-boat Flotilla 1 April – 31 May 1943 13th U-boat Flotilla 1 June – 28 August 1943
Identification codes:	M 50 196
Commanders:	Oblt.z.S. Walter Wichmann 10 September 1942 – 28 August 1943
Operations:	4 patrols: 1st patrol: 24 March – 25 April 1943 2nd patrol: a. 12 May – 7 June 1943 b. 8 June 1943 c. 14 – 15 June 1943 3rd patrol: a. 24 July – 4 August 1943 b. 5 August 1943 4th patrol: 11 – 28 August 1943
Victories:	None

German submarine U-639 was a Type VIIC U-boat built for Nazi Germany's Kriegsmarine for service during World War II. She was laid down on 31 October 1941 at Blohm & Voss in Hamburg as yard number 615, launched on 22 July 1942 and went into service on 10 September 1942. U-639 spent her entire career operating out of Norway. Over the course of four patrols she neither sank nor damaged any ships, and was sunk by the Soviet submarine S-101 in the Kara Sea while on a minelaying mission.^[1]^[2]

Design

German Type VIIC submarines were preceded by the shorter Type VIIB submarines. U-639 had a displacement of 769 tonnes (757 long tons) when at the surface and 871 tonnes (857 long tons) while submerged.^[3] She had a total length of 67.10 m (220 ft 2 in), a pressure hull length of 50.50 m (165 ft 8 in), a beam of 6.20 m (20 ft 4 in), a height of 9.60 m (31 ft 6 in), and a draught of 4.74 m (15 ft 7 in). The submarine was powered by two Germaniawerft F46 four-stroke, six-cylinder supercharged diesel engines producing a total of 2,800 to 3,200 metric horsepower (2,060 to 2,350 kW; 2,760 to 3,160 shp) for use while surfaced, two BBC GG UB 720/8 double-acting electric motors producing a total of 750 metric horsepower (550 kW; 740 shp) for use while submerged. She had two shafts and two 1.23 m (4 ft) propellers. The boat was capable of operating at depths of up to 230 metres (750 ft).^[3]

The submarine had a maximum surface speed of 17.7 knots (32.8 km/h; 20.4 mph) and a maximum submerged speed of 7.6 knots (14.1 km/h; 8.7 mph).^[3] When submerged, the boat could operate for 80 nautical miles (150 km; 92 mi) at 4 knots (7.4 km/h; 4.6 mph); when surfaced, she could travel 8,500 nautical miles (15,700 km; 9,800 mi) at 10 knots (19 km/h; 12 mph). U-639 was fitted with five 53.3 cm (21 in) torpedo tubes (four fitted at the bow and one at the stern), fourteen torpedoes, one 8.8 cm (3.46 in) SK C/35 naval gun, 220 rounds, and one twin 2 cm (0.79 in) C/30 anti-aircraft gun. The boat had a complement of between forty-four and sixty.^[3]

References

^ Helgason, Guðmundur. "The Type VIIC boat U-639". German U-boats of WWII - uboat.net. Retrieved 27 December 2014.
^ Blair 1998, p. 469
^ ^a ^b ^c ^d Gröner 1991, pp. 43–46.

Bibliography

Blair, Clay (1998). Hitler's U-boat War, The Hunted 1942–1945. New York: Random House. ISBN 978-0-679-45742-8.
Busch, Rainer; Röll, Hans-Joachim (1999). German U-boat commanders of World War II : a biographical dictionary. Translated by Brooks, Geoffrey. London, Annapolis, Md: Greenhill Books, Naval Institute Press. ISBN 1-55750-186-6.
Busch, Rainer; Röll, Hans-Joachim (1999). Der U-Boot-Krieg, 1939-1945: Deutsche U-Boot-Verluste von September 1939 bis Mai 1945 [German U-boat losses from September 1939 to May 1945] (in German). Vol. IV. Hamburg, Berlin, Bonn: Mittler. ISBN 3-8132-0514-2.
Gröner, Eric; Jung, Dieter; Maass, Martin (1991). German Warships 1815-1945: U-boats and Mine Warfare Vessels. Vol. 2. Translated by Thomas, Keith; Magowan, Rachel. London: Conway Maritime Press. ISBN 0-85177-593-4.

External links

Helgason, Guðmundur. "The Type VIIC boat U-639". German U-boats of WWII - uboat.net. Retrieved 30 December 2014.

German Type VII submarines

Type VIIA

U-27
U-28
U-29
U-30
U-31
U-32
U-33
U-34
U-35
U-36

Type VIIB

U-45
U-46
U-47
U-48
U-49
U-50
U-51
U-52
U-53
U-54
U-55
U-73
U-74
U-75
U-76
U-83
U-84
U-85
U-86
U-87
U-99
U-100
U-101
U-102

Type VIIC

U-69
U-70
U-71
U-72
U-77
U-78
U-79
U-80
U-81
U-82
U-88
U-89
U-90
U-91
U-92
U-93
U-94
U-95
U-96
U-97
U-98
U-132
U-133
U-134
U-135
U-136
U-201
U-202
U-203
U-204
U-205
U-206
U-207
U-208
U-209
U-210
U-211
U-212
U-221
U-222
U-223
U-224
U-225
U-226
U-227
U-228
U-229
U-230
U-231
U-232
U-235
U-236
U-237
U-238
U-239
U-240
U-241
U-242
U-243
U-244
U-245
U-246
U-247
U-248
U-249
U-250
U-251
U-252
U-253
U-254
U-255
U-256
U-257
U-258
U-259
U-260
U-261
U-262
U-263
U-264
U-265
U-266
U-267
U-268
U-269
U-270
U-271
U-272
U-273
U-274
U-275
U-276
U-277
U-278
U-279
U-280
U-281
U-282
U-283
U-284
U-285
U-286
U-287
U-288
U-289
U-290
U-291
U-301
U-302
U-303
U-304
U-305
U-306
U-307
U-308
U-309
U-310
U-311
U-312
U-313
U-314
U-315
U-316
U-331
U-332
U-333
U-334
U-335
U-336
U-337
U-338
U-339
U-340
U-341
U-342
U-343
U-344
U-345
U-346
U-347
U-348
U-349
U-350
U-351
U-352
U-353
U-354
U-355
U-356
U-357
U-358
U-359
U-360
U-361
U-362
U-363
U-364
U-365
U-366
U-367
U-368
U-369
U-370
U-371
U-372
U-373
U-374
U-375
U-376
U-377
U-378
U-379
U-380
U-381
U-382
U-383
U-384
U-385
U-386
U-387
U-388
U-389
U-390
U-391
U-392
U-393
U-394
U-396
U-397
U-398
U-399
U-400
U-401
U-402
U-403
U-404
U-405
U-406
U-407
U-408
U-409
U-410
U-411
U-412
U-413
U-414
U-415
U-416
U-417
U-418
U-419
U-420
U-421
U-422
U-423
U-424
U-425
U-426
U-427
U-428
U-429
U-430
U-431
U-432
U-433
U-434
U-435
U-436
U-437
U-438
U-439
U-440
U-441
U-442
U-443
U-444
U-445
U-446
U-447
U-448
U-449
U-450
U-451
U-452
U-453
U-454
U-455
U-456
U-457
U-458
U-465
U-466
U-467
U-468
U-469
U-470
U-471
U-472
U-473
U-475
U-476
U-477
U-478
U-479
U-480
U-481
U-482
U-483
U-484
U-485
U-486
U-551
U-552
U-553
U-554
U-555
U-556
U-557
U-558
U-559
U-560
U-561
U-562
U-563
U-564
U-565
U-566
U-567
U-568
U-569
U-570
U-571
U-572
U-573
U-574
U-575
U-576
U-577
U-578
U-579
U-580
U-581
U-582
U-583
U-584
U-585
U-586
U-587
U-588
U-589
U-590
U-591
U-592
U-593
U-594
U-595
U-596
U-597
U-598
U-599
U-600
U-601
U-602
U-603
U-604
U-605
U-606
U-607
U-608
U-609
U-610
U-611
U-612
U-613
U-614
U-615
U-616
U-617
U-618
U-619
U-620
U-621
U-622
U-623
U-624
U-625
U-626
U-627
U-628
U-629
U-630
U-631
U-632
U-633
U-634
U-635
U-636
U-637
U-638
U-639
U-640
U-641
U-642
U-643
U-644
U-645
U-646
U-647
U-648
U-649
U-650
U-651
U-652
U-653
U-654
U-655
U-656
U-657
U-658
U-659
U-660
U-661
U-662
U-663
U-664
U-665
U-666
U-667
U-668
U-669
U-670
U-671
U-672
U-673
U-674
U-675
U-676
U-677
U-678
U-679
U-680
U-681
U-682
U-683
U-701
U-702
U-703
U-704
U-705
U-706
U-707
U-708
U-709
U-710
U-711
U-712
U-713
U-714
U-715
U-716
U-717
U-718
U-719
U-720
U-721
U-722
U-731
U-732
U-733
U-734
U-735
U-736
U-737
U-738
U-739
U-740
U-741
U-742
U-743
U-744
U-745
U-746
U-747
U-748
U-749
U-750
U-751
U-752
U-753
U-754
U-755
U-756
U-757
U-758
U-759
U-760
U-761
U-762
U-763
U-764
U-765
U-766
U-767
U-768
U-771
U-772
U-773
U-774
U-775
U-776
U-777
U-778
U-779
U-821
U-822
U-825
U-826
U-901
U-903
U-904
U-905
U-907
U-921
U-922
U-923
U-924
U-925
U-926
U-927
U-928
U-951
U-952
U-953
U-954
U-955
U-956
U-957
U-958
U-959
U-960
U-961
U-962
U-963
U-964
U-965
U-966
U-967
U-968
U-969
U-970
U-971
U-972
U-973
U-974
U-975
U-976
U-977
U-978
U-979
U-980
U-981
U-982
U-983
U-984
U-985
U-986
U-987
U-988
U-989
U-990
U-991
U-992
U-993
U-994
U-1051
U-1052
U-1053
U-1054
U-1055
U-1056
U-1057
U-1058
U-1101
U-1102
U-1131
U-1132
U-1161
U-1162
U-1191
U-1192
U-1193
U-1194
U-1195
U-1196
U-1197
U-1198
U-1199
U-1200
U-1201
U-1202
U-1203
U-1204
U-1205
U-1206
U-1207
U-1208
U-1209
U-1210

Type VIIC/41

U-292
U-293
U-294
U-295
U-296
U-297
U-298
U-299
U-300
U-317
U-318
U-319
U-320
U-321
U-322
U-323
U-324
U-325
U-326
U-327
U-328
U-691
U-827
U-828
U-929
U-930
U-995
U-997
U-998
U-999
U-1000
U-1001
U-1002
U-1003
U-1004
U-1005
U-1006
U-1007
U-1008
U-1009
U-1010
U-1011
U-1013
U-1014
U-1015
U-1016
U-1017
U-1018
U-1019
U-1020
U-1021
U-1022
U-1023
U-1024
U-1025
U-1063
U-1064
U-1065
U-1103
U-1104
U-1105
U-1106
U-1107
U-1108
U-1109
U-1110
U-1163
U-1164
U-1165
U-1166
U-1167
U-1168
U-1169
U-1170
U-1171
U-1172
U-1271
U-1272
U-1273
U-1274
U-1275
U-1276
U-1277
U-1278
U-1279
U-1301
U-1302
U-1303
U-1304
U-1305
U-1306
U-1307
U-1308

Type VIID

U-213
U-214
U-215
U-216
U-217
U-218

Type VIIF

U-1059
U-1060
U-1061
U-1062

Preceded by: Type II
Followed by: Type IX

List of U-boats of Germany

v t e Shipwrecks and maritime incidents in August 1943
Shipwrecks	1 Aug: U-383, U-454 2 Aug: USS PT-109, U-106, V 420 Alcyon 3 Aug: U-335, U-572, U-706 4 Aug: Catania, Fort La Montee, Lombardia, U-489 5 Aug: USS Plymouth, U-34 6 Aug: Arashi, Hagikaze, Kawakaze 7 Aug: U-84, U-117, U-615 9 Aug: U-664 11 Aug: U-468, U-525, U-604 12 Aug: Clan Macarthur 13 Aug: USS John Penn 14 Aug: HMS Saracen 15 Aug: LST-414 16 Aug: Empire Kestrel 18 Aug: Cha-5, Cha-12, U-403 19 August: I-17 20 Aug: U-197, U-670 23 Aug: USS Crow, Riilahti, USS SC-694 24 Aug: Erg, U-134, U-185 25 Aug: Ro-35, U-523 27 Aug: HMS Egret, U-847 28 Aug: U-639 29 Aug: Niels Juel 30 Aug: U-634 Unknown date: HMS Parthian, SA 7
Other incidents	4 Aug: HMS Arrow, Kembu Maru 10 Aug: USS Brant 11 Aug: USS Raton 18 Aug: USS Abner Read 30 Aug: USS Cod 31 Aug: USS Stingray
1942 1943 1944 July 1943 September 1943