Knowledge (XXG)

HMS L21

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in broadside mounts. They carried four reload torpedoes for the 21-inch tubes for a grand total of ten torpedoes of all sizes. They were also armed with a 4-inch (102 mm)
618: 1175: 1142: 356:(31 km/h; 20 mph) on the surface and 10.5 knots (19.4 km/h; 12.1 mph) underwater. On the surface, the L class had a range of 3,800 1355: 611: 1168: 551: 325:
914 long tons (929 t) on the surface and 1,089 long tons (1,106 t) submerged. The L-class submarines had a crew of 38 officers and
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built for the Royal Navy during World War I. The boat was not completed before the end of the war and was sold for
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whilst under tow to the breakers on 22 February 1939. She was refloated two days later on 24 February.
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torpedoes and more fuel. The submarine had a length of 238 feet 7 inches (72.7 m)
1283: 1098: 566: 547: 523: 396: 73: 1276: 345: 314: 69: 582:"The Development of HM Submarines From Holland No. 1 (1901) to Porpoise (1930) (BR3043)" 1210: 537: 415: 349: 310: 224:(7,000 km; 4,400 mi) at 10 kn (19 km/h; 12 mph) on the surface 189: 1344: 1221: 411: 357: 341: 291: 221: 183: 543:
Ships of the Royal Navy: The Complete Record of all Fighting Ships of the Royal Navy
364: 326: 318: 254: 1069: 353: 204: 643: 337: 164: 596: 581: 348:. When submerged each propeller was driven by a 600-horsepower (447 kW) 1259: 388: 522:(reprint of the 1989 ed.). Penzance, Cornwall: Periscope Publishing. 399: 372: 270: 360:(7,000 km; 4,400 mi) at 10 knots (19 km/h; 12 mph). 1077: 1030: 1018: 951: 944: 937: 930: 923: 882: 850: 843: 836: 829: 822: 815: 801: 794: 787: 780: 773: 766: 759: 752: 745: 738: 392: 333: 731: 710: 703: 696: 689: 682: 675: 668: 661: 1157: 600: 332:
For surface running, the boats were powered by two 12-cylinder
504:. No. 48239. London. 25 February 1939. col G, p. 9. 317:
of 23 feet 6 inches (7.2 m) and a mean
210:
10.5 kn (19.4 km/h; 12.1 mph) submerged
406:
on 11 October 1918, and completed on 5 October 1920.
329:. They had a diving depth of 150 feet (45.7 m). 1240: 1189: 1060: 903: 721: 651: 634: 1184:Shipwrecks and maritime incidents in February 1939 561:Gardiner, Robert & Gray, Randal, eds. (1985). 563:Conway's All the World's Fighting Ships 1906–1921 410:was sold in February 1939 and ran aground on the 321:of 13 feet 3 inches (4.0 m). They 305:and its successors were enlarged to accommodate 432: 430: 565:. Annapolis, Maryland: Naval Institute Press. 1169: 612: 546:(Rev. ed.). London: Chatham Publishing. 520:Encyclopaedia of British Submarines 1901–1955 8: 1366:World War I submarines of the United Kingdom 1143:List of submarine classes of the Royal Navy 1176: 1162: 1154: 648: 619: 605: 597: 170:1,600 hp (1,200 kW) (electric) 127:1,089 long tons (1,106 t) submerged 426: 363:The boats were armed with four 21-inch 20: 468: 466: 444: 442: 32: 7: 1138:List of submarines of the Royal Navy 456: 454: 207:(31 km/h; 20 mph) surfaced 137:238 ft 7 in (72.7 m) 124:914 long tons (929 t) surfaced 14: 153:13 ft 3 in (4.0 m) 145:23 ft 6 in (7.2 m) 99:Sold for scrapping, February 1939 1356:Ships built in Barrow-in-Furness 1326: 1321: 1309: 1301: 1062: 636: 580:Harrison, A. N. (January 1979). 34: 436:Gardiner and Gray 1985, p. 93. 1: 1392: 1376:Maritime incidents in 1939 1351:British L-class submarines 628:British L-class submarines 448:Gardiner & Gray, p. 93 1296: 1133: 1113: 1093: 103: 27: 23: 391:on 15 September 1917 by 261:18 in (457 mm) 252:21 in (533 mm) 167:(1,800 kW) (diesel) 540:; Warlow, Ben (2006) . 518:Akermann, Paul (2002). 379:Construction and career 104:General characteristics 352:. They could reach 17 307:21-inch (53.3 cm) 298:Design and description 232:150 feet (45.7 m) 1371:Royal Navy ship names 490:Harrison, Chapter 27 481:Harrison, Chapter 25 472:Harrison, Chapter 11 369:18-inch (45 cm) 367:in the bow and two 344:, each driving one 1338: 1337: 1151: 1150: 1056: 1055: 553:978-1-86176-281-8 500:"News in Brief". 397:Barrow-in-Furness 288:L-class submarine 278: 277: 113:L-class submarine 83:15 September 1917 74:Barrow-in-Furness 16:British submarine 1383: 1330: 1325: 1313: 1305: 1289: 1264: 1254: 1233: 1216: 1205: 1178: 1171: 1164: 1155: 1068: 1066: 1065: 649: 642: 640: 639: 621: 614: 607: 598: 593: 591: 589: 576: 557: 533: 506: 505: 497: 491: 488: 482: 479: 473: 470: 461: 460:Akermann, p. 165 458: 449: 446: 437: 434: 338:brake-horsepower 42: 39: 38: 37: 21: 1391: 1390: 1386: 1385: 1384: 1382: 1381: 1380: 1341: 1340: 1339: 1334: 1317: 1292: 1267: 1257: 1247: 1241:Other incidents 1236: 1219: 1208: 1198: 1185: 1182: 1152: 1147: 1129: 1109: 1089: 1063: 1061: 1052: 899: 717: 637: 635: 630: 625: 587: 585: 579: 573: 560: 554: 538:Colledge, J. J. 536: 530: 517: 514: 509: 499: 498: 494: 489: 485: 480: 476: 471: 464: 459: 452: 447: 440: 435: 428: 424: 381: 346:propeller shaft 300: 190:electric motors 158:Installed power 91:11 October 1919 70:Vickers Limited 40: 35: 33: 17: 12: 11: 5: 1389: 1387: 1379: 1378: 1373: 1368: 1363: 1358: 1353: 1343: 1342: 1336: 1335: 1297: 1294: 1293: 1291: 1290: 1265: 1255: 1244: 1242: 1238: 1237: 1235: 1234: 1217: 1206: 1195: 1193: 1187: 1186: 1183: 1181: 1180: 1173: 1166: 1158: 1149: 1148: 1146: 1145: 1140: 1134: 1131: 1130: 1128: 1127: 1124: 1121: 1118: 1114: 1111: 1110: 1108: 1107: 1101: 1094: 1091: 1090: 1088: 1087: 1074: 1072: 1058: 1057: 1054: 1053: 1051: 1050: 1045: 1040: 1035: 1028: 1023: 1016: 1011: 1006: 1001: 996: 991: 986: 981: 976: 971: 966: 961: 956: 949: 942: 935: 928: 921: 916: 910: 908: 901: 900: 898: 897: 892: 887: 880: 875: 870: 865: 860: 855: 848: 841: 834: 827: 820: 813: 806: 799: 792: 785: 778: 771: 764: 757: 750: 743: 736: 728: 726: 719: 718: 716: 715: 708: 701: 694: 687: 680: 673: 666: 658: 656: 646: 632: 631: 626: 624: 623: 616: 609: 601: 595: 594: 577: 571: 558: 552: 534: 528: 513: 510: 508: 507: 492: 483: 474: 462: 450: 438: 425: 423: 420: 380: 377: 358:nautical miles 350:electric motor 342:diesel engines 340:(895 kW) 299: 296: 276: 275: 274: 273: 264: 257: 246: 242: 241: 238: 234: 233: 230: 226: 225: 218: 214: 213: 212: 211: 208: 199: 195: 194: 193: 192: 186: 184:diesel engines 178: 174: 173: 172: 171: 168: 159: 155: 154: 151: 147: 146: 143: 139: 138: 135: 131: 130: 129: 128: 125: 120: 116: 115: 110: 109:Class and type 106: 105: 101: 100: 97: 93: 92: 89: 85: 84: 81: 77: 76: 67: 63: 62: 59: 55: 54: 48: 44: 43: 41:United Kingdom 30: 29: 25: 24: 15: 13: 10: 9: 6: 4: 3: 2: 1388: 1377: 1374: 1372: 1369: 1367: 1364: 1362: 1359: 1357: 1354: 1352: 1349: 1348: 1346: 1333: 1329: 1324: 1320: 1316: 1312: 1308: 1304: 1300: 1295: 1288: 1287: 1281: 1280: 1274: 1273: 1266: 1263: 1262: 1256: 1253: 1252: 1246: 1245: 1243: 1239: 1232: 1231: 1225: 1224: 1218: 1215: 1214: 1207: 1204: 1203: 1197: 1196: 1194: 1192: 1188: 1179: 1174: 1172: 1167: 1165: 1160: 1159: 1156: 1144: 1141: 1139: 1136: 1135: 1132: 1125: 1122: 1120:Not completed 1119: 1116: 1115: 1112: 1106: 1103:Followed by: 1102: 1100: 1097:Preceded by: 1096: 1095: 1092: 1085: 1081: 1080: 1076: 1075: 1073: 1071: 1059: 1049: 1046: 1044: 1041: 1039: 1036: 1034: 1033: 1029: 1027: 1024: 1022: 1021: 1017: 1015: 1012: 1010: 1007: 1005: 1002: 1000: 997: 995: 992: 990: 987: 985: 982: 980: 977: 975: 972: 970: 967: 965: 962: 960: 957: 955: 954: 950: 948: 947: 943: 941: 940: 936: 934: 933: 929: 927: 926: 922: 920: 917: 915: 912: 911: 909: 906: 902: 896: 893: 891: 888: 886: 885: 881: 879: 876: 874: 871: 869: 866: 864: 861: 859: 856: 854: 853: 849: 847: 846: 842: 840: 839: 835: 833: 832: 828: 826: 825: 821: 819: 818: 814: 812: 811: 807: 805: 804: 800: 798: 797: 793: 791: 790: 786: 784: 783: 779: 777: 776: 772: 770: 769: 765: 763: 762: 758: 756: 755: 751: 749: 748: 744: 742: 741: 737: 735: 734: 730: 729: 727: 724: 720: 714: 713: 709: 707: 706: 702: 700: 699: 695: 693: 692: 688: 686: 685: 681: 679: 678: 674: 672: 671: 667: 665: 664: 660: 659: 657: 654: 650: 647: 645: 633: 629: 622: 617: 615: 610: 608: 603: 602: 599: 583: 578: 574: 572:0-85177-245-5 568: 564: 559: 555: 549: 545: 544: 539: 535: 531: 529:1-904381-05-7 525: 521: 516: 515: 511: 503: 496: 493: 487: 484: 478: 475: 469: 467: 463: 457: 455: 451: 445: 443: 439: 433: 431: 427: 421: 419: 417: 413: 412:Isle of Arran 409: 405: 401: 398: 394: 390: 386: 378: 376: 374: 370: 366: 365:torpedo tubes 361: 359: 355: 351: 347: 343: 339: 335: 330: 328: 324: 320: 316: 312: 308: 304: 297: 295: 293: 289: 285: 284: 272: 269: 265: 263:torpedo tubes 262: 258: 256: 255:torpedo tubes 253: 249: 248: 247: 244: 243: 239: 236: 235: 231: 228: 227: 223: 219: 216: 215: 209: 206: 202: 201: 200: 197: 196: 191: 187: 185: 181: 180: 179: 176: 175: 169: 166: 162: 161: 160: 157: 156: 152: 149: 148: 144: 141: 140: 136: 133: 132: 126: 123: 122: 121: 118: 117: 114: 111: 108: 107: 102: 98: 95: 94: 90: 87: 86: 82: 79: 78: 75: 71: 68: 65: 64: 61:December 1916 60: 57: 56: 53: 49: 46: 45: 31: 26: 22: 19: 1319:January 1939 1285: 1278: 1271: 1269: 1260: 1249: 1229: 1222: 1212: 1200: 1083: 1078: 1047: 1042: 1037: 1031: 1025: 1019: 1013: 1008: 1003: 998: 993: 988: 983: 978: 973: 968: 963: 958: 952: 945: 938: 931: 924: 918: 913: 904: 894: 889: 883: 877: 872: 867: 862: 857: 851: 844: 837: 830: 823: 816: 809: 808: 802: 795: 788: 781: 774: 767: 760: 753: 746: 739: 732: 722: 711: 704: 697: 690: 683: 676: 669: 662: 652: 588:27 September 586:. Retrieved 562: 541: 519: 501: 495: 486: 477: 407: 384: 382: 362: 331: 302: 301: 282: 280: 279: 119:Displacement 51: 18: 1070:Soviet Navy 220:3,800  163:2,400  1361:1919 ships 1345:Categories 1332:March 1939 1223:Lightburne 1211:HMAS  1191:Shipwrecks 1079:Bezbozhnik 644:Royal Navy 512:References 237:Complement 229:Test depth 177:Propulsion 1284:HMS  1277:HMS  1270:HMS  1228:USS  1213:Swordsman 1126:Cancelled 584:. RN Subs 502:The Times 395:at their 389:laid down 323:displaced 294:in 1939. 259:2 × beam 80:Laid down 1268:22 Feb: 1230:Monocacy 1220:10 Feb: 404:launched 400:shipyard 373:deck gun 271:deck gun 250:4 × bow 245:Armament 203:17  88:Launched 1286:Sunfish 1279:Sterlet 1258:4 Feb: 1248:2 Feb: 1209:8 Feb: 1199:2 Feb: 1105:M class 1099:J class 393:Vickers 334:Vickers 327:ratings 311:overall 150:Draught 66:Builder 58:Ordered 28:History 1261:Bruges 1067:  641:  569:  550:  526:  336:1,200- 286:was a 268:4-inch 134:Length 907:class 725:class 655:class 422:Notes 354:knots 319:draft 292:scrap 217:Range 198:Speed 1315:1940 1307:1939 1299:1938 1251:I-60 1202:I-63 1082:(ex- 590:2022 567:ISBN 548:ISBN 524:ISBN 416:Bute 387:was 383:HMS 315:beam 313:, a 281:HMS 266:1 × 188:2 × 182:2 × 142:Beam 96:Fate 50:HMS 47:Name 1272:L21 1084:L55 1048:L74 1043:L73 1038:L72 1032:L71 1026:L70 1020:L69 1014:L68 1009:L67 1004:L66 999:L65 994:L64 989:L63 984:L62 979:L61 974:L60 969:L59 964:L58 959:L57 953:L56 946:L55 939:L54 932:L53 925:L52 919:L51 914:L50 905:L50 895:L35 890:L34 884:L33 878:L32 873:L31 868:L30 863:L29 858:L28 852:L27 845:L26 838:L25 831:L24 824:L23 817:L22 810:L21 803:L20 796:L19 789:L18 782:L17 775:L16 768:L15 761:L14 754:L12 747:L11 740:L10 408:L21 385:L21 283:L21 222:nmi 165:bhp 52:L21 1347:: 1282:, 1275:, 1226:, 733:L9 723:L9 712:L8 705:L7 698:L6 691:L5 684:L4 677:L3 670:L2 663:L1 653:L1 465:^ 453:^ 441:^ 429:^ 414:, 402:, 375:. 303:L9 240:38 205:kn 72:, 1177:e 1170:t 1163:v 1123:X 1117:N 1086:) 620:e 613:t 606:v 592:. 575:. 556:. 532:.

Index

Vickers Limited
Barrow-in-Furness
L-class submarine
bhp
diesel engines
electric motors
kn
nmi
21 in (533 mm)
torpedo tubes
18 in (457 mm)
4-inch
deck gun
L-class submarine
scrap
21-inch (53.3 cm)
overall
beam
draft
displaced
ratings
Vickers
brake-horsepower
diesel engines
propeller shaft
electric motor
knots
nautical miles
torpedo tubes
18-inch (45 cm)

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