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Pennsylvania Railroad class P5

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The Modified units (along with the R1 and prototype GG1) were built with riveted carbodies. However, unit #4770, rebuilt to a Modified appearance in January 1945 after being wrecked in February 1944, differed from previous Modifieds in having an all-welded carbody, the type of construction famously
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accident on the New York Division confirmed traincrews' concerns about safety when the crew were killed after colliding with a truckload of apples. A redesign was undertaken, giving the locomotives a central cab, raised higher, with narrower-topped, streamlined "noses" to the locomotive to enable
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on each axle, but the trucks were a single motor per axle. This modification also meant that locomotive's entire weight was carried on driven wheels. Despite these advantages the experiment was not repeated, however #4702 continued in its modified form.
725:. Each truck axle was given a 375-horsepower (280 kW) motor, adding 1,500 hp (1,100 kW) to give a total power output of 5,250 hp (3,910 kW) and a wheel arrangement of B-C-B or Bo′CoBo′. The main drivers had used 490:. A grade crossing accident in which the crew were killed led to the substitution of a central cab to give better crash protection, a streamlined steeple type, in later production, a design which was also applied to the GG1. 709:. Instead, it was revealed that the GG1 project, under the direction of industrial designer Donald R. Dohner, was the first to receive the center cab design, and that soon afterward it was applied to the R1 and P5. 644:
These prototypes had electrical equipment from both Westinghouse and General Electric; the design was by both companies and the PRR's electrical department, and the equipment from each manufacturer was identical.
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the crew to see forward. The final 28 locomotives were built to this design, which was not given a separate class designation since it was mechanically and electrically identical; they were called class
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Visually, the class P5b could be distinguished from a boxcab P5a by having a lower row of ventilation grilles on the sides of the superstructure, and by having outside brake cylinders on the trucks.
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due to minor changes from the prototypes (notably, larger traction motor blowers). Production was split between General Electric and Westinghouse; the GE examples were assembled at GE's
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When the GG1s were put in passenger service, the P5s were regeared and used in freight service for many years. The last of the class was withdrawn from service in April 1965.
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to paired motors geared (25:97) to quill drives on each driving axle; plus single motors geared to driving axles on end trucks on P5b (gear ratio: 17:50)
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Documentation published in 2010 disproved the decades long belief that the modified P5's new shell design came first and was then applied to the
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facility, still a locomotive assembly plant today, while final assembly for the Westinghouse order was subcontracted to the
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steam locomotive, the P5 was an "electric Pacific" designed to match or better the performance of the PRR's ubiquitous
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Investigation no. 2774 The Pennsylvania Railroad Company report in re accident near Roxton, Pa., on February 13, 1944
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lengthened by adding another pair of driving wheels; while the O1 was an "electric Atlantic" equivalent to the
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locomotives meant that the P5 class were mostly used on freight. A single survivor, prototype #4700, is at the
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In October 1937, P5a #4702 was rebuilt with motors in its trucks to become the only locomotive in subclass
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Two prototype locomotives were outshopped from the PRR's Altoona Works in 1931. They were essentially the
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Wayt, Hampton C. (Fall 2010). "Update on the GG1's genesis". Classic Trains (Kalmbach) 11 (3): 86–87.
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6× 625 hp (466 kW) AC motors; plus 4× 375 hp (280 kW) motors on the trucks on P5b
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steam locomotives, so the P5s were the only 4-6-4 type locomotives owned by the PRR.
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Pennsy Power: Steam and Electric Locomotives of the Pennsylvania Railroad, 1900-1957
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444,700 lb (201,700 kg; 201.7 t) (P5b, all wheels driven);
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Pennsylvania Railroad Technical and Historical Society (August 2004).
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394,000 lb (179,000 kg; 179 t) (P5a (modified))
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229,000 lb (104,000 kg; 104 t) (P5a (modified))
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Orders were placed for 90 production locomotives classified
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77,000 lb (35,000 kg; 35 t) (P5a (modified))
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Class P5, Renumbered 4700 & 4791 respectively in 1933
1036:. Edison, New Jersey: Morning Sun Books. pp. 26–27. 16:"P5A" redirects here. For a planned Mars spacecraft, see 300:
392,000 lb (178,000 kg; 178 t) (P5, P5a);
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220,000 lb (100,000 kg; 100 t) (P5, P5a);
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444,700 lb (201,700 kg; 201.7 t) (P5b);
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10 ft 8.25 in (3.26 m) (P5a (modified))
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at each end. This is an equivalent to a 4-6-4 in the
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74,000 lb (34,000 kg; 34 t) (P5, P5a);
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15 ft (4.57 m) over locked-down pantographs
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77,800 lb (35,300 kg; 35.3 t) (P5b);
266: 258: 248: 240: 228: 218: 207: 197: 161: 148: 135: 122: 113: 108: 90: 82: 59: 51: 46: 25: 252:10 ft 6 in (3.20 m) (P5, P5a, P5b); 929: 927: 925: 2750:Standard gauge locomotives of the United States 923: 921: 919: 917: 915: 913: 911: 909: 907: 905: 1604: 1415: 1069: 879: 877: 875: 873: 782:Staufer, Alvin F.; Pennypacker, Bert (1962). 777: 775: 773: 771: 769: 767: 765: 234:49 ft 10 in (15.19 m) (total); 8: 871: 869: 867: 865: 863: 861: 859: 857: 855: 853: 827: 825: 823: 821: 819: 817: 815: 813: 811: 809: 807: 805: 803: 713:utilized in the production run of the GG1. 2439: 2169: 1638: 1631: 1611: 1597: 1589: 1422: 1408: 1400: 1076: 1062: 1054: 492: 406:One P5 prototype preserved; rest scrapped. 370: 105: 43: 2740:Electric locomotives of the United States 761: 2745:Railway locomotives introduced in 1931 467:system — three pairs of driven wheels 22: 7: 1430:Electric locomotives built by the 1335:VGN EL-C / New Haven EF-4 / PC E33 494:Table of P5 locomotive production 428:constructed 1931–1935 by the PRR, 14: 2720:Pennsylvania Railroad locomotives 2602:Articulated electric locomotives: 1553:AC Electrics (Ignitron rectifier) 1323:AC Electrics (Ignitron Rectifier) 553:4770 rebuilt as Modified in 1945 469:rigidly mounted to the locomotive 442:National Museum of Transportation 1578:List of Westinghouse locomotives 1349:AC Electrics (Silicon Rectifier) 1009:Interstate Commerce Commission. 236:20 ft (6.10 m) (rigid) 31: 998:. February 14, 1944. p. 1. 357:AC current fed via transformer 2561:Articulated steam locomotives: 1537:AC Electrics (motor generator) 1287:AC Electrics (motor generator) 1084:Electric locomotives built by 486:The first P5s were built with 1: 1432:Westinghouse Electric Company 1126:Canadian National Class Z-1-a 1093:DC Electrics (Bipolar motors) 750:PRR locomotive classification 18:AMSAT § Current projects 2715:General Electric locomotives 1032:Volkmer, William D. (1991). 542:4702 rebuilt to P5b in 1937 471:, with a two-axle unpowered 479:. The PRR did not have any 424:comprised 92 mixed-traffic 2766: 669:P5a (modified) steeplecabs 649:P5a production locomotives 214:72 in (1,829 mm) 15: 1629: 1573: 1384: 586: 576: 532: 521: 369: 104: 42: 30: 2735:Westinghouse locomotives 663:Baldwin Locomotive Works 224:36 in (914 mm) 203:36 in (914 mm) 1511:AC Electrics (side rod) 1175:Mexican Railway Boxcabs 940:PRR Locomotive Diagrams 934:Pennsylvania Railroad. 890:PRR Locomotive Diagrams 884:Pennsylvania Railroad. 838:PRR Locomotive Diagrams 832:Pennsylvania Railroad. 1389:List of GE locomotives 1275:AC Electrics (3 phase) 727:double traction motors 694: 244:62 ft (19 m) 1620:Pennsylvania Railroad 1366:E60CH / E60CP / E60MA 1220:CN Centercab Electric 1210:Paulista Rwy. 2-C+C-2 1034:Pennsy Electric Years 995:Philadelphia Inquirer 961:"PRR Chronology 1965" 705:, and eventually the 692: 631:PRR's 2-B-2 O1 design 453:AAR wheel arrangement 418:Pennsylvania Railroad 382:Pennsylvania Railroad 78:General Electric (25) 2725:11 kV AC locomotives 1110:MILW EP-2 “Bi-polar” 693:P5a (modified) #4780 426:electric locomotives 2710:Baldwin locomotives 682:, and colloquially 495: 1635:    695: 659:Erie, Pennsylvania 493: 465:UIC classification 446:St Louis, Missouri 2730:4-6-4 locomotives 2697: 2696: 2692: 2691: 2688: 2687: 2436: 2435: 2166: 2165: 1586: 1585: 1397: 1396: 793:978-0-9445-1304-0 619: 618: 414: 413: 410: 409: 365: 364: 333:Current pickup(s) 310:Electric system/s 100: 99: 2757: 2440: 2170: 1639: 1632: 1613: 1606: 1599: 1590: 1424: 1417: 1410: 1401: 1304:GN Y-1 / PRR FF2 1200:Tri-power boxcab 1155:MILW EF-1 / EP-1 1151: 1139: 1078: 1071: 1064: 1055: 1048: 1047: 1029: 1023: 1022: 1006: 1000: 999: 989: 983: 980: 974: 973: 971: 970: 965: 956: 950: 949: 947: 946: 936:"P5a (modified)" 931: 900: 899: 897: 896: 881: 848: 847: 845: 844: 829: 798: 797: 779: 735: 600:General Electric 547:General Electric 496: 434:General Electric 371: 285: 193: 187: 183: 181: 180: 176: 173: 106: 93: 44: 35: 23: 2765: 2764: 2760: 2759: 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#10003 1950: 1945: 1940: 1935: 1930: 1925: 1920: 1915: 1910: 1905: 1900: 1895: 1890: 1885: 1880: 1875: 1870: 1865: 1860: 1855: 1850: 1845: 1840: 1835: 1830: 1825: 1820: 1815: 1810: 1805: 1800: 1795: 1790: 1784: 1782: 1774: 1773: 1771: 1770: 1765: 1760: 1755: 1749: 1747: 1739: 1738: 1736: 1735: 1730: 1725: 1720: 1715: 1710: 1705: 1700: 1695: 1689: 1687: 1679: 1678: 1676: 1675: 1670: 1665: 1660: 1655: 1649: 1647: 1636: 1630: 1627: 1626: 1618: 1616: 1615: 1608: 1601: 1593: 1584: 1583: 1574: 1571: 1570: 1568: 1567: 1562: 1556: 1554: 1550: 1549: 1547: 1546: 1540: 1538: 1534: 1533: 1531: 1530: 1525: 1520: 1514: 1512: 1508: 1507: 1505: 1504: 1499: 1494: 1489: 1484: 1479: 1474: 1469: 1463: 1461: 1457: 1456: 1454: 1453: 1448: 1442: 1440: 1436: 1435: 1429: 1427: 1426: 1419: 1412: 1404: 1395: 1394: 1385: 1382: 1381: 1379: 1378: 1373: 1368: 1363: 1358: 1352: 1350: 1346: 1345: 1343: 1342: 1337: 1332: 1330:New Haven EP-5 1326: 1324: 1320: 1319: 1317: 1316: 1311: 1306: 1301: 1296: 1290: 1288: 1284: 1283: 1278: 1276: 1272: 1271: 1269: 1268: 1263: 1261:New Haven EF3a 1258: 1253: 1248: 1243: 1237: 1235: 1231: 1230: 1228: 1227: 1222: 1217: 1212: 1207: 1202: 1197: 1192: 1187: 1182: 1177: 1172: 1170:GE 289A Boxcab 1167: 1162: 1157: 1152: 1140: 1128: 1122: 1120: 1116: 1115: 1113: 1112: 1107: 1102: 1096: 1094: 1090: 1089: 1083: 1081: 1080: 1073: 1066: 1058: 1050: 1049: 1042: 1024: 1001: 984: 975: 951: 901: 849: 834:"P5 & P5a" 799: 792: 760: 759: 757: 754: 753: 752: 745: 742: 718: 717:P5b experiment 715: 680:P5a (modified) 675:grade crossing 670: 667: 650: 647: 626: 623: 617: 616: 614: 611: 607: 606: 604: 601: 597: 596: 594: 591: 588: 584: 583: 581: 578: 575: 572: 568: 567: 565: 562: 559: 555: 554: 551: 548: 544: 543: 540: 537: 534: 530: 529: 526: 523: 520: 517: 513: 512: 509: 506: 503: 500: 477:Whyte notation 412: 411: 408: 407: 404: 400: 399: 396: 392: 391: 388: 384: 383: 380: 376: 375: 367: 366: 363: 362: 355: 351: 350: 347: 341: 340: 335: 329: 328: 312: 306: 305: 298: 294: 293: 286: 278: 277: 270: 264: 263: 260: 256: 255: 250: 246: 245: 242: 238: 237: 232: 226: 225: 222: 216: 215: 212: 205: 204: 201: 195: 194: 191:standard gauge 165: 159: 158: 153: 146: 145: 140: 133: 132: 127: 120: 119: 116: 114:Configuration: 111: 110: 109:Specifications 102: 101: 98: 97: 94: 92:Total produced 88: 87: 84: 80: 79: 61: 57: 56: 53: 49: 48: 40: 39: 36: 28: 27: 13: 10: 9: 6: 4: 3: 2: 2762: 2751: 2748: 2746: 2743: 2741: 2738: 2736: 2733: 2731: 2728: 2726: 2723: 2721: 2718: 2716: 2713: 2711: 2708: 2707: 2705: 2681: 2678: 2676: 2673: 2671: 2668: 2666: 2663: 2662: 2660: 2658:Non-standard: 2656: 2650: 2647: 2645: 2642: 2640: 2637: 2635: 2632: 2630: 2627: 2625: 2622: 2620: 2617: 2615: 2612: 2610: 2607: 2606: 2604: 2600: 2594: 2591: 2589: 2586: 2584: 2581: 2579: 2576: 2574: 2571: 2569: 2566: 2565: 2563: 2559: 2553: 2550: 2549: 2547: 2544: 2539: 2533: 2530: 2528: 2525: 2524: 2522: 2519: 2515: 2510: 2504: 2501: 2500: 2498: 2495: 2490: 2484: 2481: 2479: 2476: 2475: 2473: 2470: 2466: 2461: 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317: 313: 311: 307: 299: 295: 287: 284: 279: 271: 269: 265: 261: 257: 251: 247: 243: 239: 233: 231: 227: 223: 221: 220:Trailing dia. 217: 213: 210: 206: 202: 200: 196: 192: 186:1,435 mm 166: 164: 160: 157: 154: 152: 149: •  147: 144: 141: 139: 136: •  134: 131: 128: 126: 123: •  121: 117: 112: 107: 103: 95: 89: 85: 81: 75: 71: 66: 65:Altoona Works 62: 58: 54: 50: 45: 41: 37:PRR P5a #4761 34: 29: 24: 19: 2453: 1575: 1523:N&W LC-2 1518:N&W LC-1 1491: 1460:AC Electrics 1439:DC Electrics 1386: 1245: 1234:AC Electrics 1215:“Little Joe” 1119:DC Electrics 1033: 1027: 1010: 1004: 993: 987: 978: 967:. Retrieved 954: 943:. Retrieved 939: 893:. Retrieved 889: 841:. Retrieved 837: 783: 739: 722: 720: 711: 696: 683: 679: 672: 654: 652: 643: 639:K4s Pacifics 628: 620: 590:Westinghouse 561:Westinghouse 536:Westinghouse 508:Road numbers 485: 451:They had an 450: 430:Westinghouse 421: 415: 359:tap changers 354:Transmission 199:Leading dia. 74:Westinghouse 1623:locomotives 1576:(see also: 1387:(see also: 1190:NYC R-Motor 1185:NYC Q-Motor 1180:NYC P Motor 1146: [ 1134: [ 1105:NYC T-Motor 1100:NYC S-Motor 730: [ 403:Disposition 297:Loco weight 2704:Categories 969:2008-08-30 945:2008-08-29 895:2008-08-29 843:2008-08-29 756:References 338:Pantograph 83:Build date 52:Power type 26:PRR P5/P5a 1528:VGN EL-3a 1451:MILW EP-3 1314:VGN EL-2B 1280:GN boxcab 1165:MILW ES-2 1160:MILW ES-1 1019:947002343 684:Modifieds 613:4781-4790 603:4775-4779 593:4743–4754 564:4733-4742 550:4755–4774 539:4701–4732 525:7898-7899 505:Bodystyle 420:'s class 395:Preserved 390:4700–4791 379:Operators 268:Axle load 230:Wheelbase 86:1931–1935 2028:de Glehn 1502:NH EF-3b 1195:CUT P1-a 1143:JNR ED14 1131:JNR ED11 744:See also 673:A fatal 577:Modified 488:box cabs 326:Catenary 182: in 118:​ 55:Electric 2543:4-4-4-4 2514:6-4-4-6 2469:4-4-6-4 2465:4-6-4-4 1565:PRR E2c 1560:PRR E3b 1492:PRR P5a 1487:NH EP-2 1482:NH EF-1 1477:NH EY-2 1467:NH EP-1 1446:PRR AA1 1340:PRR E44 1266:PRR E2b 1251:PRR GG1 1246:PRR P5a 1225:NJ E-10 1205:NYC R-2 610:Altoona 574:Altoona 519:Altoona 502:Builder 463:in the 387:Numbers 177:⁄ 70:Baldwin 60:Builder 2394:2-10-2 2259:2-10-4 2235:2-10-0 1733:B1 (e) 1693:B1 (s) 1544:GN Z-1 1497:PRR R1 1472:CN Z-2 1376:E60C-2 1309:GN W-1 1040:  1017:  790:  522:Boxcab 511:Notes 461:2′Co2′ 374:Career 259:Height 241:Length 209:Driver 156:2′Co2′ 2518:6-8-6 2494:4-8-4 2445:4-6-4 2419:4-4-4 2374:4-8-2 2339:2-8-2 2284:4-6-2 2255:2-6-2 2175:2-8-0 2119:4-6-0 2039:2-6-0 1964:4-4-2 1779:4-4-0 1744:0-8-0 1684:0-6-0 1644:0-4-0 1150:] 1138:] 964:(PDF) 886:"P5b" 734:] 481:4-6-4 473:truck 459:, or 457:2-C-2 321:@ 25 249:Width 163:Gauge 143:2-C-2 130:4-6-4 125:Whyte 2593:HH2s 2588:HH1s 2578:HC1s 2573:CC2s 2568:CC1s 2516:and 2467:and 2328:K29s 2318:K21s 2257:and 1371:E25B 1361:E60C 1356:E50C 1038:ISBN 1015:OCLC 788:ISBN 587:1935 580:4780 571:1934 558:1933 533:1932 516:1931 499:Year 432:and 416:The 398:4700 211:dia. 76:(54) 67:(13) 63:PRR 2680:E44 2675:E3b 2670:E2c 2665:E2b 2649:GG1 2644:FF2 2639:FF1 2634:DD2 2629:DD1 2624:BB3 2619:BB2 2614:BB1 2609:AA1 2583:HH1 2541:T ( 2512:S ( 2492:R ( 2463:Q ( 2443:P ( 2417:O ( 2408:N2s 2403:N1s 2392:N ( 2372:M ( 2353:L2s 2348:L1s 2337:L ( 2323:K28 2308:K4s 2303:K3s 2282:K ( 2273:J28 2253:J ( 2233:I ( 2224:H10 2173:H ( 2158:G53 2117:G ( 2108:F61 2103:F31 2098:F30 2093:F27 2088:F26 2083:F25 2078:F24 2073:F23 2068:F22 2063:F21 2037:F ( 2023:E28 2018:E23 2013:E22 2008:E21 1962:E ( 1948:D61 1943:D39 1938:D38 1933:D37 1928:D36 1923:D35 1918:D34 1913:D33 1908:D32 1903:D31 1898:D30 1893:D26 1888:D25 1883:D24 1878:D23 1873:D22 1868:D21 1863:D16 1858:D15 1853:D14 1848:D13 1843:D12 1838:D11 1833:D10 1777:D ( 1768:C31 1763:C30 1758:C29 1742:C ( 1682:B ( 1673:A5s 1642:A ( 723:P5b 707:DD2 699:GG1 655:P5a 635:E6s 455:of 444:in 438:GG1 314:11 151:UIC 138:AAR 2706:: 2552:T1 2545:): 2532:S2 2527:S1 2520:): 2503:R1 2496:): 2483:Q2 2478:Q1 2471:): 2454:P5 2447:): 2428:O1 2421:): 2396:): 2383:M1 2376:): 2363:L6 2358:L5 2341:): 2313:K5 2298:K2 2293:K1 2286:): 2268:J1 2261:): 2244:I1 2237:): 2219:H9 2214:H8 2209:H6 2204:H5 2199:H4 2194:H3 2189:H2 2184:H1 2177:): 2153:G6 2148:G5 2143:G4 2138:G3 2133:G2 2128:G1 2121:): 2058:F3 2053:F2 2048:F1 2041:): 2003:E7 1998:E6 1993:E5 1988:E4 1983:E3 1978:E2 1973:E1 1966:): 1828:D9 1823:D8 1818:D7 1813:D6 1808:D5 1803:D4 1798:D3 1793:D2 1788:D1 1781:): 1753:C1 1746:): 1728:B8 1723:B7 1718:B6 1713:B5 1708:B4 1703:B3 1698:B2 1686:): 1668:A4 1663:A3 1658:A2 1653:A1 1646:): 1148:ja 1136:ja 1086:GE 1013:. 938:. 904:^ 888:. 852:^ 836:. 802:^ 764:^ 732:de 703:R1 701:, 686:. 665:. 641:. 448:. 422:P5 323:Hz 319:AC 316:kV 188:) 96:92 1612:e 1605:t 1598:v 1580:) 1423:e 1416:t 1409:v 1391:) 1077:e 1070:t 1063:v 1046:. 1021:. 972:. 948:. 898:. 846:. 796:. 184:( 179:2 175:1 172:+ 170:8 72:- 20:.

Index

AMSAT § Current projects

Altoona Works
Baldwin
Westinghouse
Whyte
4-6-4
AAR
2-C-2
UIC
2′Co2′
Gauge
standard gauge
Leading dia.
Driver
Trailing dia.
Wheelbase
Axle load
Adhesive weight
Electric system/s
kV
AC
Hz
Catenary
Current pickup(s)
Pantograph
Traction motors
tap changers
Pennsylvania Railroad
electric locomotives

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