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Mark 6 exploder

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magnetic exploder problems were solved. This experience was exactly the sort of live-fire trial BuOrd had been prevented from doing in peacetime, causing one submarine skipper to complain, " round trips of 8,500 miles (13,700 km) into enemy waters to gain attack positions undetected within 800 yards (730 m) of enemy ships only to find that torpedoes run deep and over half the time fail to function, seems to me an undesirable method of gaining information which might be determined any morning within a few miles of a torpedo station in the presence of comparatively few hazards." It was now clear to all at Pearl Harbor that the contact pistol was also defective.
398:) was machined to take the place of the Mark 6's heavy pin block so inertial forces would be lower. Electrical switches, developed by Johnson, were tried as well. Both fixes worked and were relatively easy to implement. In September 1943, the first torpedoes with new contact pistols were sent to war. "After twenty-one months of war, the three major defects of the Mark 14 torpedo had at last been isolated. ... Each defect had been discovered and fixed in the field—always over the stubborn opposition of the Bureau of Ordnance." 250: 55: 394:, supervised by Taylor, dropped dummy warheads filled with sand from a crane raised to a height of 90 feet (27 m). In 7 out of 10 of these trials, firing mechanisms bent, jammed, and failed with the high inertia of a straight-on hit (the prewar ideal). A quick fix was to encourage "glancing" shots (which cut the number of duds in half), until a permanent solution could be found. Lightweight aluminum alloy (from propellers of Japanese planes shot down during the 63: 17: 74:. A typical exploder had a firing pin that stuck out from the warhead and was restrained by a transverse shear pin. The torpedo would hit the target with enough energy to break the shear pin and allow the firing pin to strike a percussion cap that ultimately detonated the warhead. An arming impeller was an additional safety device: the firing pin could not move until the torpedo had traveled a preset distance. 289: 305:
Early reports of torpedo action included some dud hits, heard as a dull clang. In a few instances, Mark 14s would strike a Japanese ship and lodge in its hull without exploding. The contact pistol appeared to be malfunctioning, though the conclusion was anything but clear until running depth and
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Many submarine commanders in the first two years of the war reported explosions of the warhead with little to no damage of the enemy. The magnetic exploders were triggering prematurely, before getting close enough to the vessel to destroy it. Earth's magnetic field near NTS, where the trials (limited
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Due to budgetary constraints, very few live-fire trials of the torpedo or exploder were ever conducted. The goal of most exercise firings was to get the torpedo to run under the target, after which it was assumed the magnetic influence feature would do the work. This misplaced trust in the magnetic
202:, which fired one hundred trial shots between 10°N and 10°S and collected 7,000 readings. The tests were done using torpedoes with instrumented exercise heads: an electric eye would take an upward-looking picture from the torpedo; the magnetic influence feature would set off some 172:
In the first test, the torpedo ran underneath the target submarine but did not explode; a second test was successful. Those two shots were the only live-fire tests until World War II. After several redesigns, General Electric in
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describing problem of deceleration of torpedo, recognizing the deceleration would destroy the torpedo, and suggesting an empty space in front of torpedo "to gain a few thousands of a second" in which to detonate the
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Against orders, some submariners disabled the magnetic influence feature of the Mark 6 exploder, suspecting it was faulty. An increase in hits was reported. Shortly after replacing Wilkes in Fremantle,
339:, BuOrd on 1 August 1942 finally conceded the Mark 14 ran deep, and six weeks later, "that its depth-control mechanism had been 'improperly designed and tested'". This satisfied Lockwood and 292:
Later model of the Mark 6 magnetic exploder assembly that uses a ball switch assembly as the contact exploder. The ball switch did not have the high acceleration problems of the earlier models.
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The contact pistol frequently failed to fire the warhead. It often jammed with a textbook right angle hit to a ship's side as the firing pin could not take the shock of the impact.
526: 1422: 112:, with its contact exploder, could not disable a major warship. Torpedoes would need to explode underneath a capital ship, where there were no blisters or other armor. The 387:, beginning 31 August. Their third test shot was a dud. This revealed the firing pin had not been able to contact the detonator hard enough to fire the warhead. 1150: 147:
of World War I. The Mark 6 was intended to fire the warhead beneath the ship, creating a huge gas bubble which would cause the keel to fail catastrophically.
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exploder helped mask the depth problems encountered by early torpedoes, for if the exploder were to work properly a depth error of a few feet would not matter.
237:, but prohibited the use of a live warhead, and insisted BuOrd pay the cost of refloating her if she was hit in error. These were strange restrictions, as 698:
How Much Is That in Real Money? A Historical Price Index for Use as a Deflator of Money Values in the Economy of the United States: Addenda et Corrigenda
96:. The torpedo would explode against the blister but do little damage to the hull. Torpedo blisters were tested on two battleships, the decommissioned 241:
was due to be scrapped. BuOrd declined. A service manual for the exploder "was written—but, for security reasons, not printed—and locked in a safe."
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The Mark 6 exploder, designated Project G53, was developed "behind the tightest veil of secrecy the Navy had ever created." In less than two years,
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Gundersen, Charles R.; Armstrong, Jerry E. (April 26, 2012). The Mark 6 magnetic influence exploder: a little premature (Report). Keyport, WA:
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Defective, inadequately tested Mark 6 Mod 1 exploder used early in the war. In September 1943, it was replaced with the Mark 6 Mod 5.
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How Much Is That in Real Money? A Historical Price Index for Use as a Deflator of Money Values in the Economy of the United States
280:. The problems could lead to misses or failures, and tended to mask one another, making isolating any one of them more difficult. 1295:
Talks about depth setting problem (as early as 1938), but also Einstein and exploder; timing is generous in Einstein's favor.
986: 725: 705: 1154: 261:, it was discovered the torpedo had several major flaws. Two of these were directly related to the Mark 6 exploder: 391: 97: 1391: 323: 211: 1246: 196: 151: 1278: 395: 364: 222: 103: 1300: 1226: 334: 174: 121: 117: 356:) ordered his boats to deactivate the Mark 6's influence feature and use only its contact pistol. 249: 368: 340: 231: 192: 178: 140: 82: 54: 319: 470: 462: 182: 136: 89: 78: 29: 62: 16: 899: 716: 696: 1304: 1284: 1262: 1256: 1207: 1201: 1123: 1106: 1088: 1062: 1036: 1018: 71: 504: 1376:"The USN Pacific Submarine Campaign - Hey, the torpedoes are working now! (Jul'43 - Dec'43)" 712: 692: 214: 159: 155: 297:
as they were) were conducted, differed from the areas where the fighting was taking place.
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1,000 apiece. The exploder was tested at the Newport lab and in a small field test aboard
113: 109: 43: 39: 128:. Its fairly small 643 lb (292 kg) warhead required it to explode beneath the 1329: 374: 456: 1406: 1316: 994: 144: 81:(commonly called BuOrd) started developing an inertial exploder. The result was the 1258:
South Pacific Destroyer: The Battle for the Solomons from Savo Island to Vella Gulf
1218: 330: 316: 93: 1356: 195:, who headed the Mark 14's design team, equatorial tests were later conducted by 1120:
Instructions for upkeep & Operation of the Mark VI Mod. 1 exploder mechanism
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on 20 June 1942. Eight hundred Mark 14s had already been fired in combat.
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Iron Men and Tin Fish: The Race to Build a Better Torpedo During World War II
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To avoid "shaking hands with St. Peter" (as Lockwood put it), E.A. Johnson,
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Hellions of the Deep: The Development of American Torpedoes in World War II
158:. The prototype exploder was fitted to a Mark 10 torpedo and test-fired in 20:
Mark 6 exploder. This version apparently does not have a voltage regulator.
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Mark 6 was not just a sub problem. Claims Mark 15 had speed of 45 knots.
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Torpedo Mark 13, OP 629(A), Description, Adjustment, Care, and Operation
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Confidential and Secret General Administrative Files, ca 1/1943–5/1945
1193:. Letter to Commander Stephen Brunauer, U.S. Navy Bureau of Ordnance. 1033:
Pig Boats: The True Story of the Fighting Submariners of World War II
987:"U. S. Navy Torpedoes. Part Two: The great torpedo scandal, 1941–43." 349:), who both refused to believe the exploder could also be defective. 808:
History of United States Naval Operations in World War II, volume IV
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developed in the 1920s. It was the standard exploder of the Navy's
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The Illustrated Encyclopedia of 20th Century Weapons and Warfare
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Warships employed defenses against torpedoes. A new technology,
1206:. Baltimore: The Johns Hopkins University Press. p. 163. 629:(London: Phoebus Publishing, 1978), Volume 8, p.807, "Duplex" 1330:"The Mark 6 magnetic influence exploder: a little premature" 124:, to replace the Mark 10, which had been in service since 1203:
The Practical Einstein: Experiments, Patents, Inventions
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Between 1934 and 1936. Fitzsimons, Volume 5, p.542, "
1351:. Department of the Navy, U.S. Pacific Fleet. 1943. 764: 762: 527:"The Hard Lessons of World War II Torpedo Failures" 1173:. San Francisco Maritime National Park Association 1052:United States of America Torpedoes of World War II 1046:United States submarine operations in World War II 1261:. Annapolis: Naval Institute Press. p. 154. 352:Finally, in July 1943, Admiral Lockwood (by then 753: 666: 579: 567: 257:After the Mark 14 entered combat service in the 1338:Winter 2013. Excerpts from the original report. 1122:, Ordnance Pamphlet, Bureau of Ordnance, 1938, 968: 966: 953: 951: 949: 947: 934: 932: 930: 871: 869: 856: 854: 253:Mechanical drawing of the Mark6 Mod 1 exploder. 1059:Ship Killer: A History of the American Torpedo 844:Milford, Frederick J. "U. S. Navy Torpedoes." 785: 783: 781: 779: 777: 650: 648: 609: 607: 605: 1171:"Mark 6 Magnetic Exploder Mechanism (images)" 802: 800: 798: 592: 590: 588: 8: 1247:"Einstein destroyed 37 Hitler's submarines" 1057:Wildenberg, Thomas; Polmar, Norman (2010), 1423:Military equipment introduced in the 1920s 1280:Hirohito's War: The Pacific War, 1941–1945 1151:"Mark 14-3A Torpedo and its MK 6 Exploder" 143:and German models, all inspired by German 1325:Fall 2013. Naval Undersea Museum figures. 902:U.S. Torpedo Troubles During World War II 1105:, Annapolis, Md: Naval Institute Press, 1061:, Annapolis, MD: Naval Institute Press, 553: 1087:, Pennsylvania State University Press, 985:Milford, Frederick J. (October 1996b), 734:"Consumer Price Index (estimate) 1800–" 563: 561: 448: 424: 177:made 30 production units, at a cost of 1390:Blazich Jr., Frank A. (October 2021). 478: 468: 1386:(Has images of Lockwood's drop tests) 1255:Crenshaw, Russell Sydnor Jr. (1998). 972: 957: 938: 921: 887: 875: 860: 789: 768: 732:Federal Reserve Bank of Minneapolis. 678: 654: 625:Fitzsimons, Bernard, general editor. 613: 596: 7: 1225:Schwarz, Frederic D. (Spring 1998). 154:produced a prototype with help from 920:Under command of Willard Saunders. 822:Fitzsimons, Volume 5, p.541, table. 1251:Einstein and the acoustic torpedo. 1044:. Originally published in 1949 as 272:Similar problems also plagued the 14: 1048:; Bantam version may be abridged. 377:, and others fired warshots from 265:It often caused premature firing. 135:This led to the development of a 497:"Torpedo History: Torpedo Mk 13" 435:used Mark 4 or Mark 8 exploders. 363:'s gunnery and torpedo officer, 139:feature, similar to the British 1317:"History of the Howell Torpedo" 322:ordered a historic net test at 1413:Torpedoes of the United States 1145:. World War II in the Pacific. 1: 1283:. Bloomsbury Publishing Plc. 1249:. the reference frame (blog). 1245:Motl, Luboš (November 2012). 525:Patrick, John (Winter 2012), 329:After a historic net test by 162:on 8 May 1926; the submarine 77:Just before World War I, the 1017:, Philadelphia: Lippincott, 754:Wildenberg & Polmar 2010 726:American Antiquarian Society 706:American Antiquarian Society 667:Wildenberg & Polmar 2010 580:Wildenberg & Polmar 2010 568:Wildenberg & Polmar 2010 1358:Torpedoman's Mate 3 & 2 1345:"S75(1) Mark 6-1 Exploders" 1439: 1418:World War II naval weapons 1374:Drachinifel (2023-11-15). 1231:Invention & Technology 1191:"Torpedo before explosion" 1101:Newpower, Anthony (2010), 359:Tests were carried out by 132:where there was no armor. 1031:Roscoe, Theodore (1967), 212:Chief of Naval Operations 108:; the conclusion was the 1013:Blair, Clay Jr. (1975), 58:A failed 1926 test shot. 1398:. U.S. Naval Institute. 1083:Gannon, Robert (1996), 152:Newport Torpedo Station 118:Newport Torpedo Station 1396:Naval History Magazine 1277:Pike, Francis (2015). 503:. Navy. Archived from 396:attack on Pearl Harbor 293: 254: 67: 59: 21: 1301:Naval Undersea Museum 1227:"Einstein's Ordnance" 1200:Illy, József (2012). 900:Shireman, Douglas A. 291: 252: 191:At the urging of Lt. 70:Early torpedoes used 65: 57: 19: 1392:"Pieces of the Past" 1035:, New York: Bantam, 991:The Submarine Review 846:The Submarine Review 533:(47), archived from 284:Premature explosions 116:was designed at the 806:Morison, Samuel E. 383:into the cliffs of 102:and the unfinished 1334:Undersea Quarterly 1321:Undersea Quarterly 1189:(4 January 1944). 1157:on 13 October 2004 908:2008-02-28 at the 890:, pp. 226–227 463:United States Navy 294: 276:used by U.S. Navy 255: 137:magnetic influence 79:Bureau of Ordnance 68: 60: 30:United States Navy 22: 1323:. pp. 1, 12. 1290:978-1-4725-9673-4 1268:978-1-61251-550-2 1213:978-1-4214-0457-8 1112:978-1-59114-623-0 1068:978-1-59114-688-9 362: 355: 347: 341:Robert H. English 193:Ralph W. Christie 72:contact exploders 1430: 1399: 1385: 1370: 1368: 1366: 1352: 1337: 1336:. pp. 7–13. 1324: 1312: 1294: 1272: 1250: 1241: 1239: 1237: 1217: 1194: 1187:Einstein, Albert 1182: 1180: 1178: 1166: 1164: 1162: 1153:. Archived from 1146: 1131: 1115: 1097: 1071: 1043: 1027: 999: 998: 993:, archived from 982: 976: 970: 961: 955: 942: 936: 925: 918: 912: 897: 891: 885: 879: 873: 864: 858: 849: 842: 836: 829: 823: 820: 814: 804: 793: 787: 772: 771:, pp. 61–62 766: 757: 751: 745: 744: 742: 740: 729: 723: 709: 703: 688: 682: 676: 670: 669:, pp. 64–65 664: 658: 652: 643: 636: 630: 623: 617: 611: 600: 594: 583: 577: 571: 565: 556: 551: 545: 544: 543: 542: 531:Undersea Warfare 522: 516: 515: 513: 512: 493: 487: 486: 480: 476: 474: 466: 453: 436: 429: 360: 353: 345: 320:Charles Lockwood 215:William V. Pratt 169:was the target. 160:Narragansett Bay 156:General Electric 90:torpedo blisters 1438: 1437: 1433: 1432: 1431: 1429: 1428: 1427: 1403: 1402: 1389: 1373: 1364: 1362: 1355: 1343: 1328: 1315: 1298: 1291: 1276: 1269: 1254: 1244: 1235: 1233: 1224: 1214: 1199: 1185: 1176: 1174: 1169: 1160: 1158: 1149: 1143:"Dud Torpedoes" 1141: 1138: 1118: 1113: 1100: 1095: 1082: 1079: 1077:Further reading 1074: 1069: 1056: 1030: 1025: 1012: 1008: 1003: 1002: 984: 983: 979: 971: 964: 956: 945: 937: 928: 919: 915: 910:Wayback Machine 898: 894: 886: 882: 874: 867: 859: 852: 843: 839: 830: 826: 821: 817: 805: 796: 788: 775: 767: 760: 752: 748: 738: 736: 731: 721: 713:McCusker, J. J. 711: 701: 693:McCusker, J. J. 691: 689: 685: 677: 673: 665: 661: 653: 646: 637: 633: 624: 620: 612: 603: 595: 586: 578: 574: 566: 559: 552: 548: 540: 538: 524: 523: 519: 510: 508: 495: 494: 490: 477: 467: 455: 454: 450: 445: 440: 439: 433:Mark 13 torpedo 430: 426: 421: 416: 404: 312: 303: 286: 274:Mark 15 torpedo 247: 114:Mark 14 torpedo 110:Mark 10 torpedo 83:Mark 3 exploder 52: 44:Mark 15 torpedo 40:Mark 14 torpedo 26:Mark 6 exploder 12: 11: 5: 1436: 1434: 1426: 1425: 1420: 1415: 1405: 1404: 1401: 1400: 1387: 1371: 1353: 1341: 1340: 1339: 1326: 1296: 1289: 1274: 1267: 1252: 1242: 1222: 1221:also involved. 1212: 1197: 1183: 1167: 1147: 1137: 1136:External links 1134: 1133: 1132: 1116: 1111: 1098: 1093: 1078: 1075: 1073: 1072: 1067: 1054: 1049: 1028: 1023: 1015:Silent Victory 1009: 1007: 1004: 1001: 1000: 977: 962: 943: 926: 913: 892: 880: 865: 850: 837: 824: 815: 794: 773: 758: 746: 730:1800–present: 683: 671: 659: 644: 631: 618: 601: 584: 572: 557: 546: 517: 501:Keyport museum 488: 447: 446: 444: 441: 438: 437: 423: 422: 420: 417: 415: 412: 411: 410: 403: 400: 375:"Swede" Momsen 311: 308: 302: 299: 285: 282: 270: 269: 266: 246: 243: 145:magnetic mines 99:South Carolina 92:, appeared on 51: 48: 13: 10: 9: 6: 4: 3: 2: 1435: 1424: 1421: 1419: 1416: 1414: 1411: 1410: 1408: 1397: 1393: 1388: 1383: 1382: 1377: 1372: 1360: 1359: 1354: 1350: 1346: 1342: 1335: 1331: 1327: 1322: 1318: 1314: 1313: 1310: 1306: 1302: 1297: 1292: 1286: 1282: 1281: 1275: 1270: 1264: 1260: 1259: 1253: 1248: 1243: 1232: 1228: 1223: 1220: 1215: 1209: 1205: 1204: 1198: 1192: 1188: 1184: 1172: 1168: 1156: 1152: 1148: 1144: 1140: 1139: 1135: 1129: 1125: 1121: 1117: 1114: 1108: 1104: 1099: 1096: 1094:0-271-01508-X 1090: 1086: 1081: 1080: 1076: 1070: 1064: 1060: 1055: 1053: 1050: 1047: 1042: 1038: 1034: 1029: 1026: 1024:0-553-01050-6 1020: 1016: 1011: 1010: 1005: 997:on 2009-10-23 996: 992: 988: 981: 978: 975:, p. 439 974: 969: 967: 963: 960:, p. 438 959: 954: 952: 950: 948: 944: 941:, p. 437 940: 935: 933: 931: 927: 924:, p. 437 923: 917: 914: 911: 907: 904: 903: 896: 893: 889: 884: 881: 878:, p. 275 877: 872: 870: 866: 863:, p. 274 862: 857: 855: 851: 848:, April 1996. 847: 841: 838: 834: 828: 825: 819: 816: 813: 809: 803: 801: 799: 795: 791: 786: 784: 782: 780: 778: 774: 770: 765: 763: 759: 755: 750: 747: 735: 727: 720: 719: 714: 707: 700: 699: 694: 687: 684: 680: 675: 672: 668: 663: 660: 656: 651: 649: 645: 641: 635: 632: 628: 622: 619: 616:, p. 278 615: 610: 608: 606: 602: 598: 593: 591: 589: 585: 581: 576: 573: 569: 564: 562: 558: 555: 554:Milford 1996b 550: 547: 537:on 2014-10-13 536: 532: 528: 521: 518: 507:on 2014-09-15 506: 502: 498: 492: 489: 484: 472: 464: 460: 459: 452: 449: 442: 434: 428: 425: 418: 413: 409: 408:Magnetic mine 406: 405: 401: 399: 397: 393: 388: 386: 382: 381: 376: 372: 371: 366: 357: 350: 348: 342: 338: 337: 332: 327: 325: 324:Frenchman Bay 321: 318: 309: 307: 300: 298: 290: 283: 281: 279: 275: 267: 264: 263: 262: 260: 251: 244: 242: 240: 236: 235: 230: 227: 225: 220: 216: 213: 207: 205: 201: 200: 194: 189: 187: 186: 180: 176: 170: 168: 167: 161: 157: 153: 148: 146: 142: 138: 133: 131: 127: 123: 119: 115: 111: 107: 106: 101: 100: 95: 94:capital ships 91: 86: 84: 80: 75: 73: 64: 56: 49: 47: 45: 41: 37: 34: 31: 27: 18: 1395: 1379: 1363:. Retrieved 1357: 1348: 1333: 1320: 1279: 1257: 1234:. Retrieved 1230: 1219:John Bardeen 1202: 1175:. Retrieved 1159:. Retrieved 1155:the original 1119: 1102: 1084: 1058: 1045: 1032: 1014: 1006:Bibliography 995:the original 990: 980: 916: 901: 895: 883: 845: 840: 832: 827: 818: 811: 807: 792:, p. 62 756:, p. 65 749: 739:February 29, 737:. Retrieved 717: 697: 686: 681:, p. 61 674: 662: 657:, p. 55 639: 634: 626: 621: 599:, p. 54 582:, p. 64 575: 570:, p. 63 549: 539:, retrieved 535:the original 530: 520: 509:. Retrieved 505:the original 500: 491: 465:. July 1942. 457: 451: 431:The similar 427: 389: 379: 369: 358: 351: 335: 328: 317:Rear Admiral 313: 304: 295: 271: 256: 238: 233: 223: 217:offered the 208: 199:Indianapolis 198: 190: 184: 171: 165: 149: 134: 104: 98: 87: 76: 69: 25: 23: 1365:10 November 1236:10 November 710:1700–1799: 690:1634–1699: 479:|work= 380:Muskallunge 373:). Taylor, 259:Pacific War 175:Schenectady 126:World War I 50:Development 1407:Categories 973:Blair 1975 958:Blair 1975 939:Blair 1975 922:Blair 1975 888:Blair 1975 876:Blair 1975 861:Blair 1975 790:Blair 1975 769:Blair 1975 679:Blair 1975 655:Blair 1975 614:Blair 1975 597:Blair 1975 541:2013-06-22 511:2013-06-05 414:References 365:Art Taylor 278:destroyers 204:gun cotton 105:Washington 1309:816122607 481:ignored ( 471:cite book 419:Footnotes 385:Kahoolawe 361:COMSUBPAC 354:COMSUBPAC 346:COMSUBPAC 310:Solutions 232:USS  229:destroyer 197:USS  183:USS  164:USS  1196:warhead. 1130:, OP 632 1128:51958048 1041:22066288 906:Archived 715:(1992). 695:(1997). 638:Dönitz, 402:See also 336:Skipjack 245:Problems 239:Ericsson 234:Ericsson 36:exploder 1381:YouTube 1177:21 July 1161:3 March 370:Haddock 331:Jim Coe 185:Raleigh 122:Newport 120:(NTS), 33:torpedo 1307:  1287:  1265:  1210:  1126:  1109:  1091:  1065:  1039:  1021:  833:Cassin 812:passim 640:Memoir 343:(then 226:-class 224:Cassin 141:Duplex 28:was a 722:(PDF) 702:(PDF) 443:Notes 1367:2022 1305:OCLC 1285:ISBN 1263:ISBN 1238:2022 1208:ISBN 1179:2015 1163:2012 1124:OCLC 1107:ISBN 1089:ISBN 1063:ISBN 1037:OCLC 1019:ISBN 741:2024 483:help 392:USNR 367:(ex- 301:Duds 219:hulk 179:US$ 130:keel 42:and 24:The 333:'s 221:of 166:L-8 1409:: 1394:. 1378:. 1347:. 1332:. 1319:. 1303:. 1229:. 989:, 965:^ 946:^ 929:^ 868:^ 853:^ 835:". 810:, 797:^ 776:^ 761:^ 724:. 704:. 647:^ 604:^ 587:^ 560:^ 529:, 499:. 475:: 473:}} 469:{{ 461:. 206:. 188:. 85:. 46:. 1384:. 1369:. 1311:. 1293:. 1271:. 1240:. 1216:. 1181:. 1165:. 743:. 728:. 708:. 642:. 514:. 485:)

Index


United States Navy
torpedo
exploder
Mark 14 torpedo
Mark 15 torpedo


contact exploders
Bureau of Ordnance
Mark 3 exploder
torpedo blisters
capital ships
South Carolina
Washington
Mark 10 torpedo
Mark 14 torpedo
Newport Torpedo Station
Newport
World War I
keel
magnetic influence
Duplex
magnetic mines
Newport Torpedo Station
General Electric
Narragansett Bay
USS L-8
Schenectady
US$

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