27:
412:
287:
36:
336:
428:
vehicle had to be transported by road, its construction was such that it could be readily disassembled into more easily transportable units, to be moved on road wheels to a workshop or for transfer of any other kind. In service, the tractor was often equipped with a water tank tender loaded with additional bags of coal on its running boards.
427:
The second Dutton tractor, no. RR1155, was a rail-only vehicle. It had a bogie at either end with the single pair of driving wheels on a differential axle in the centre. It was arranged for forward and reverse movement at all speeds, but it could only be used on the rails. Since, on occasion, the
419:
The designer, Major Frank Dutton, SAR Signal
Engineer and the Motor Transport Superintendent, argued that a rubber tyre in contact with a hard road would be better at transferring tractive power than a steel wheel on steel rail. At least two Dutton Rail Tractors were built, both steam-powered and
358:
in 1863, for use on light commuter services in the
Sacramento area. The locomotives had serious shortcomings. The single driving axle did not carry the full weight of the engine's rear end due to the trailing truck and, in addition to being too light, it therefore lacked adhesion to reliably pull
294:
Between 1869 and 1873, new locomotives were built to replace four of the original 9 feet (2,743 millimetres) diameter driving wheeled engines, re-using the engine numbers of the locomotives being replaced. These four replacement engines had slightly smaller, 8 feet 10 inches (2,692
278:
in 1853 and 1854, numbered in the range from 39 to 46. They had 9 feet (2,743 millimetres) diameter flangeless driving wheels, supported by leading and trailing two-axle bogies. The water was carried in both
363:
frame prevented the locomotives from travelling any moderate distance without consuming all of their water. As a result, these locomotives were only used when absolutely necessary.
1452:
59:
268:
41:
594:
1447:
89:
388:
In 1923, the South
African Railways (SAR) conducted trials with a prototype petrol-paraffin powered road-rail tractor and, in 1924, placed at least two
389:
626:
283:. Two more engines were built in 1859 and 1862, but with much smaller 7 feet 6 inches (2,286 millimetres) diameter driving wheels.
309:. Since it was so prone to derailing as to be unable to be moved from the workshops where it was built, it did no work and was rebuilt to a
466:
D. L. Bradley, Locomotive of the London and South
Western Railway, Part ii., Railway Correspondence and Travel Society, 1967. pp. 86-87.
488:
306:
79:
421:
320:
254:. The water was carried in both well- and back-tanks, leaving the boilers exposed in the same way as on most tender locomotives.
69:
531:
505:
The
Locomotive in South Africa - A Brief History of Railway Development. Chapter VII - South African Railways (Continued).
210:
The configuration was only used for tank engines, which is noted by adding letter suffixes to the configuration, such as
959:
442:
1473:
969:
275:
239:
147:
1483:
619:
372:, was built by the Cooke Locomotive Works for a railroad which was unable to pay for it and was purchased by the
355:
1478:
952:
373:
243:
157:
1488:
327:
class combined locomotive and inspection saloon in 1899. It was little used after
Drummond's death in 1912.
303:
411:
1348:
1280:
1151:
1040:
1442:
1428:
299:
604:
580:
354:
was one of three identical 4-2-4 tank locomotives. They were the first locomotives to be purchased by
1338:
1331:
1326:
1319:
1314:
1309:
1288:
612:
1423:
1352:
1284:
1053:
1044:
754:
546:
1418:
1405:
1155:
974:
527:
484:
447:
360:
242:
in 1853 appear to have been the first with this wheel arrangement. The engine was designed by
192:
1048:
350:
182:
1413:
341:
316:
280:
235:
238:
configurations. Eight 4-2-4 well- and back-tank locomotives which entered service on the
635:
595:"The Little Engine That Could, Watty Piper, 1954 - yellow cloth cover with black print"
558:
Patent: Dutton Light
Railway System and Locomotive Therefor, US 1306051 A, Jun 10, 1919
204:
178:
26:
1467:
324:
200:
196:
1141:
1136:
1131:
1126:
1121:
1114:
1109:
1104:
1099:
1094:
1089:
1084:
1077:
1072:
1067:
1062:
401:
368:
286:
272:
568:
557:
35:
1302:
1297:
1270:
335:
709:
569:
Patent: Vehicle for
Service on Roads and Rails, US 1561510 A, Nov 17, 1925
998:
507:
South
African Railways and Harbours Magazine, October 1945. pp. 782-783.
1263:
1258:
1253:
1248:
1243:
1238:
1233:
1226:
1221:
1216:
1211:
1206:
1201:
1196:
1191:
1186:
1179:
1174:
1169:
1164:
1030:
1025:
1020:
1015:
1010:
1003:
993:
988:
983:
947:
1390:
1361:
942:
937:
932:
925:
920:
915:
910:
905:
900:
895:
838:
806:
786:
744:
739:
724:
719:
669:
420:
both rebuilt by the
Britannia Engineering Works of Johannesburg from
247:
1395:
1383:
1378:
1373:
1366:
888:
883:
878:
873:
868:
863:
858:
853:
848:
843:
833:
828:
821:
816:
811:
801:
796:
791:
781:
776:
771:
764:
759:
749:
734:
729:
714:
704:
696:
689:
679:
674:
664:
659:
654:
649:
410:
377:
334:
311:
285:
251:
608:
359:
trains, especially on gradients. The short water tank on the
246:, the railway company's engineer, and featured single large
547:
Stronach-Dutton Road-Rail - The Roadrail System of Traction
483:. Huntington Beach, CA: Shade Tree Books. pp. 33, 51.
581:"I think I can. I think I can. - Original 1906 cover"
526:(1st ed.). Cape Town: Struik. pp. 118–119.
404:
and Singlewood in Transvaal. One of the latter had a
298:
In 1881, this wheel arrangement was also used by the
636:
Steam locomotive wheel arrangements (Whyte notation)
481:
Southern Pacific Company Steam Locomotive Compendium
1404:
1347:
1279:
1150:
1039:
968:
642:
250:driving wheels between two supporting four-wheeled
163:
153:
143:
135:
127:
119:
114:
98:
88:
78:
68:
58:
53:
479:Diebert, Timothy S.; Strapac, Joseph A. (1987).
474:
472:
234:This wheel arrangement was only used on various
517:
515:
513:
620:
8:
415:Dutton rail-only tractor no. RR1155, c. 1924
19:
627:
613:
605:
111:
50:
524:Locomotives of the South African Railways
214:for a conventional side-tank locomotive,
459:
295:millimetres), diameter driving wheels.
503:Espitalier, T.J.; Day, W.A.J. (1945).
18:
522:Paxton, Leith; Bourne, David (1985).
226:for a rack-equipped tank locomotive.
7:
269:first eight known 4-2-4T locomotives
376:. This locomotive was rebuilt to a
290:The second B&ER No. 40 of 1873
14:
16:Tank locomotive wheel arrangement
321:London and South Western Railway
34:
25:
222:for a well-tank locomotive and
115:First known tank engine version
366:In 1863, a sister engine, the
218:for a saddle-tank locomotive,
1:
450:with this wheel arrangement.
307:experimental locomotive No. 9
40:Pearson 4-2-4T no. 44 of the
443:The Little Engine That Could
440:from the original 1906 book
400:) narrow gauge line between
380:wheel arrangement in 1872.
315:tender locomotive in 1884.
1505:
390:Dutton steam rail tractors
276:Bristol and Exeter Railway
240:Bristol and Exeter Railway
199:on two axles, two powered
181:for the classification of
167:Bristol and Exeter Railway
148:Bristol and Exeter Railway
54:Equivalent classifications
42:Bristol and Exeter Railway
1437:
356:Southern Pacific Railroad
110:
49:
33:
24:
422:Yorkshire steam tractors
374:Central Pacific Railroad
1349:Articulated locomotives
1339:2-4-4-2+2-8-8-2+2-4-4-2
1281:Articulated locomotives
1152:Articulated locomotives
1041:Articulated locomotives
271:entered service on the
1441:Other notation forms:
416:
392:in service on the new
345:
291:
203:on one axle, and four
1315:0-6-2+2-4-2-4-2+2-6-0
414:
338:
300:Great Western Railway
289:
281:well- and back-tanks
643:Single engine types
408:wheel arrangement.
21:
1406:Geared locomotives
1332:2-10-10-10-10-10-2
438:Little Blue Engine
417:
346:
292:
1474:4-2-4 locomotives
1461:
1460:
448:Forney locomotive
193:wheel arrangement
183:steam locomotives
175:
174:
171:
170:
106:
105:
1496:
1484:Tank locomotives
629:
622:
615:
606:
599:
598:
591:
585:
584:
577:
571:
566:
560:
555:
549:
544:
538:
537:
519:
508:
501:
495:
494:
476:
467:
464:
407:
399:
395:
351:C. P. Huntington
314:
225:
221:
217:
213:
189:
112:
51:
38:
29:
22:
1504:
1503:
1499:
1498:
1497:
1495:
1494:
1493:
1479:2A2 locomotives
1464:
1463:
1462:
1457:
1433:
1400:
1351:
1343:
1320:2-6-6-2+2-6-6-2
1283:
1275:
1154:
1146:
1051:
1043:
1035:
973:
964:
638:
633:
603:
602:
593:
592:
588:
583:. 19 July 2010.
579:
578:
574:
567:
563:
556:
552:
545:
541:
534:
521:
520:
511:
502:
498:
491:
478:
477:
470:
465:
461:
456:
434:
405:
397:
393:
386:
342:C.P. Huntington
333:
323:built a 4-2-4T
317:Dugald Drummond
310:
265:
260:
236:tank locomotive
232:
223:
219:
215:
211:
205:trailing wheels
191:represents the
187:
45:
17:
12:
11:
5:
1502:
1500:
1492:
1491:
1489:Whyte notation
1486:
1481:
1476:
1466:
1465:
1459:
1458:
1456:
1455:
1450:
1445:
1438:
1435:
1434:
1432:
1431:
1426:
1421:
1416:
1410:
1408:
1402:
1401:
1399:
1398:
1393:
1387:
1386:
1381:
1376:
1370:
1369:
1364:
1358:
1356:
1345:
1344:
1342:
1341:
1335:
1334:
1329:
1323:
1322:
1317:
1312:
1306:
1305:
1300:
1294:
1292:
1277:
1276:
1274:
1273:
1267:
1266:
1261:
1256:
1251:
1246:
1241:
1236:
1230:
1229:
1224:
1219:
1214:
1209:
1204:
1199:
1194:
1189:
1183:
1182:
1177:
1172:
1167:
1161:
1159:
1148:
1147:
1145:
1144:
1139:
1134:
1129:
1124:
1118:
1117:
1112:
1107:
1102:
1097:
1092:
1087:
1081:
1080:
1075:
1070:
1065:
1059:
1057:
1037:
1036:
1034:
1033:
1028:
1023:
1018:
1013:
1007:
1006:
1001:
996:
991:
986:
980:
978:
966:
965:
963:
962:
956:
955:
950:
945:
940:
935:
929:
928:
923:
918:
913:
908:
903:
898:
892:
891:
886:
881:
876:
871:
866:
861:
856:
851:
846:
841:
836:
831:
825:
824:
819:
814:
809:
804:
799:
794:
789:
784:
779:
774:
768:
767:
762:
757:
752:
747:
742:
737:
732:
727:
722:
717:
712:
707:
701:
700:
693:
692:
687:
682:
677:
672:
667:
662:
657:
652:
646:
644:
640:
639:
634:
632:
631:
624:
617:
609:
601:
600:
586:
572:
561:
550:
539:
532:
509:
496:
489:
468:
458:
457:
455:
452:
433:
430:
385:
382:
332:
329:
304:William Dean's
264:
263:United Kingdom
261:
259:
256:
231:
228:
207:on two axles.
201:driving wheels
197:leading wheels
179:Whyte notation
173:
172:
169:
168:
165:
161:
160:
155:
151:
150:
145:
141:
140:
139:Pearson 4-2-4T
137:
133:
132:
131:United Kingdom
129:
125:
124:
121:
117:
116:
108:
107:
104:
103:
100:
96:
95:
92:
86:
85:
82:
76:
75:
72:
66:
65:
62:
56:
55:
47:
46:
39:
31:
30:
15:
13:
10:
9:
6:
4:
3:
2:
1501:
1490:
1487:
1485:
1482:
1480:
1477:
1475:
1472:
1471:
1469:
1454:
1451:
1449:
1446:
1444:
1440:
1439:
1436:
1430:
1427:
1425:
1422:
1420:
1417:
1415:
1412:
1411:
1409:
1407:
1403:
1397:
1394:
1392:
1389:
1388:
1385:
1382:
1380:
1377:
1375:
1372:
1371:
1368:
1365:
1363:
1360:
1359:
1357:
1354:
1350:
1346:
1340:
1337:
1336:
1333:
1330:
1328:
1327:2-8-8-8-8-8-2
1325:
1324:
1321:
1318:
1316:
1313:
1311:
1308:
1307:
1304:
1301:
1299:
1296:
1295:
1293:
1290:
1286:
1282:
1278:
1272:
1269:
1268:
1265:
1262:
1260:
1257:
1255:
1252:
1250:
1247:
1245:
1242:
1240:
1237:
1235:
1232:
1231:
1228:
1225:
1223:
1220:
1218:
1215:
1213:
1210:
1208:
1205:
1203:
1200:
1198:
1195:
1193:
1190:
1188:
1185:
1184:
1181:
1178:
1176:
1173:
1171:
1168:
1166:
1163:
1162:
1160:
1157:
1153:
1149:
1143:
1140:
1138:
1135:
1133:
1130:
1128:
1125:
1123:
1120:
1119:
1116:
1113:
1111:
1108:
1106:
1103:
1101:
1098:
1096:
1093:
1091:
1088:
1086:
1083:
1082:
1079:
1076:
1074:
1071:
1069:
1066:
1064:
1061:
1060:
1058:
1055:
1050:
1046:
1042:
1038:
1032:
1029:
1027:
1024:
1022:
1019:
1017:
1014:
1012:
1009:
1008:
1005:
1002:
1000:
997:
995:
992:
990:
987:
985:
982:
981:
979:
976:
971:
970:Divided drive
967:
961:
958:
957:
954:
951:
949:
946:
944:
941:
939:
936:
934:
931:
930:
927:
924:
922:
919:
917:
914:
912:
909:
907:
904:
902:
899:
897:
894:
893:
890:
887:
885:
882:
880:
877:
875:
872:
870:
867:
865:
862:
860:
857:
855:
852:
850:
847:
845:
842:
840:
837:
835:
832:
830:
827:
826:
823:
820:
818:
815:
813:
810:
808:
805:
803:
800:
798:
795:
793:
790:
788:
785:
783:
780:
778:
775:
773:
770:
769:
766:
763:
761:
758:
756:
753:
751:
748:
746:
743:
741:
738:
736:
733:
731:
728:
726:
723:
721:
718:
716:
713:
711:
708:
706:
703:
702:
698:
695:
694:
691:
688:
686:
683:
681:
678:
676:
673:
671:
668:
666:
663:
661:
658:
656:
653:
651:
648:
647:
645:
641:
637:
630:
625:
623:
618:
616:
611:
610:
607:
596:
590:
587:
582:
576:
573:
570:
565:
562:
559:
554:
551:
548:
543:
540:
535:
529:
525:
518:
516:
514:
510:
506:
500:
497:
492:
490:0-930742-12-5
486:
482:
475:
473:
469:
463:
460:
453:
451:
449:
445:
444:
439:
431:
429:
425:
423:
413:
409:
403:
391:
383:
381:
379:
375:
371:
370:
364:
362:
357:
353:
352:
344:
343:
337:
331:United States
330:
328:
326:
322:
318:
313:
308:
305:
301:
296:
288:
284:
282:
277:
274:
270:
262:
257:
255:
253:
249:
245:
244:James Pearson
241:
237:
229:
227:
208:
206:
202:
198:
194:
190:
184:
180:
166:
162:
159:
158:James Pearson
156:
152:
149:
146:
142:
138:
134:
130:
126:
122:
118:
113:
109:
101:
99:Russian class
97:
93:
91:
87:
83:
81:
80:Turkish class
77:
73:
71:
67:
63:
61:
57:
52:
48:
43:
37:
32:
28:
23:
977:engine types
684:
589:
575:
564:
553:
542:
523:
504:
499:
480:
462:
441:
437:
435:
426:
418:
402:Naboomspruit
387:
384:South Africa
367:
365:
349:
347:
340:
297:
293:
266:
233:
209:
186:
176:
70:French class
1310:2-8-8-8-8-2
1142:4-8-4+4-8-4
1137:4-8-2+2-8-4
1132:4-8-0+0-8-4
1127:2-8-2+2-8-2
1122:2-8-0+0-8-2
1115:4-6-4+4-6-4
1110:4-6-2+2-6-4
1105:4-6-0+0-6-4
1100:2-6-2+2-6-2
1095:2-6-0+0-6-2
1090:0-6-2+2-6-0
1085:0-6-0+0-6-0
1078:4-4-2+2-4-4
1073:2-4-2+2-4-2
1068:2-4-0+0-4-2
1063:0-4-0+0-4-0
398:610 mm
369:T. D. Judah
361:Forney-type
348:The engine
273:broad gauge
90:Swiss class
1468:Categories
1429:Willamette
1287:and other
699:(monorail)
533:0869772112
454:References
432:In fiction
248:flangeless
177:Under the
136:Locomotive
1303:2-8-8-8-4
1298:2-8-8-8-2
1289:Multiplex
1271:2-10-10-2
394:2 ft
120:First use
60:UIC class
44:, c. 1854
999:2-2-4-0T
230:Overview
195:of four
154:Designer
1424:Heisler
1384:0-6-4-0
1353:Engerth
1285:Triplex
1264:4-8-8-4
1259:4-8-8-2
1254:2-8-8-4
1249:2-8-8-2
1244:2-8-8-0
1239:0-8-8-0
1234:0-8-6-0
1227:4-6-6-4
1222:4-6-6-2
1217:4-4-6-2
1212:2-6-8-0
1207:2-6-6-6
1202:2-6-6-4
1197:2-6-6-2
1192:2-6-6-0
1187:0-6-6-0
1180:2-4-4-2
1175:2-4-4-0
1170:0-4-4-2
1165:0-4-4-0
1054:Garratt
1045:Fairlie
1031:4-6-4-4
1026:4-4-6-4
1021:6-4-4-6
1016:4-4-4-4
1011:2-4-6-2
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471:^
424:.
325:F9
185:,
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628:e
621:t
614:v
597:.
536:.
493:.
396:(
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