312:
Two bogies or wheel assemblies. The "Bo′" bogie is under one end of the unit, and has two powered axles, while the "(A1A)" bogie under the other end of the unit has one powered axle, one idle axle, and another powered axle. All powered axles are individually driven by traction
452:
No front leading axle, four driving axles in a bogie, four more driven axles mounted in the frame (Mallet locomotive), superheated steam, four-cylinder machine, compound (double steam expansion), tank locomotive, for freight trains (Whyte notation:
321:
Two bogies or wheel assemblies under the unit. Each bogie has two powered axles individually driven by traction motors. Three-quarters of all modern locomotives (and power cars of self-propelled trains) are configured in either this or the "B′B′"
141:
Groups letters and numbers describing the same bogie. For example, (A1A) indicates a three-axle bogie with the outer two axles driven. When parentheses are used around a single letter or number, a prime is not needed to indicate a bogie.
432:
One front leading axle in a bogie, five driving axles, one rear trailing axle, simple steam expansion, superheated steam, two-cylinder machine, for freight trains, tank engine (Whyte notation:
422:
Two front leading axles grouped in a bogie, four driving axles, one trailing axle in a bogie, simple steam expansion, superheated steam, three-cylinders, for fast trains (Whyte notation:
288:
Two bogies or wheel assemblies under the unit. Each bogie has one powered axle, one idle axle, and one more powered axle. All powered axles are individually driven by traction motors.
294:
Four powered axles all mounted in the locomotive's frame, driven in pairs, i.e. each pair of axles is connected by driving rods or gears. Compare with "D" below. (Whyte notation:
600:
530:
is used for steam locomotives (and small diesel shunters in the UK). United
Kingdom otherwise uses its own slightly simplified form of UIC. North America otherwise uses the
442:
One front leading axle in a bogie, four driving axles, saturated steam, four-cylinder machine, compound (double steam expansion), for passenger trains (Whyte notation:
502:
31:
769:
671:
487:
1162:
370:, each with two leading axles and three individually powered axles. A number of Japanese electric locomotives used this wheel arrangement, including the
348:
Two bogies or wheel assemblies under the unit. Each bogie has three powered axles, connected by driving rods or gears. One such example of this type is
1167:
1157:
571:
Locomotive cyclopedia of
American practice, 1950–52, Association of American Railroads Mechanical Division, Simmons-Boardman Pub. Co., 1950, p. 449.
497:
42:
398:
idle (non-driven) axle mounted in a bogie, four driven axles mounted in the frame and connected by driving rods or gears, followed by one
492:
38:
1172:
1152:
610:
557:
1112:
1067:
952:
813:
664:
477:
88:
602:
IRS 60650 Railway
Application - Rolling Stock - Standard designation of axle arrangement on locomotives and multiple-unit sets
833:
803:
360:
Two bogies or wheel assemblies under the unit. Each bogie has three powered axles individually driven by traction motors.
330:
Three bogies or wheel assemblies under the unit. Each bogie has two powered axles individually driven by traction motors.
1177:
306:
Two bogies or wheel assemblies under the unit. Each bogie has two powered axles, connected by driving rods or gears.
106:
Indicate driving axles, starting at A for a single axle. C thus indicates three consecutive pairs of driving wheels.
657:
1057:
887:
482:
336:
Three powered axles, connected by driving rods or gears, all mounted in the locomotive's frame (Whyte notation:
384:
Four powered axles, connected by driving rods or gears, all mounted in the locomotive's frame (Whyte notation:
325:
963:
927:
868:
143:
1042:
156:
The locomotive or multiple unit consists of permanently coupled but mechanically separate traction units.
942:
863:
828:
793:
759:
531:
467:
349:
147:
37:"UIC classification" redirects here. For the classifications of goods wagons and railway coaches, see
1131:
1027:
838:
1091:
858:
818:
1017:
808:
741:
223:
160:
897:
751:
606:
553:
507:
472:
112:
Related to driving axles (minimum 2, "B"), indicates they are individually driven by separate
61:
1007:
853:
798:
689:
355:
343:
1101:
1002:
316:
214:
638:
1096:
1086:
1047:
987:
982:
947:
843:
823:
774:
527:
399:
371:
125:
113:
77:
1146:
1076:
1022:
997:
992:
917:
892:
395:
301:
81:
69:
1037:
922:
902:
17:
1052:
1032:
1012:
932:
706:
273:
The most common wheel arrangements in modern locomotives are Bo′Bo′ and Co′Co′.
163:
are indicated by bracketing or placing plus signs between all individual units.
972:
937:
907:
848:
784:
716:
694:
680:
65:
1121:
731:
726:
711:
698:
1126:
721:
1081:
977:
454:
433:
412:
Five powered axles, mounted in the locomotive's frame (Whyte notation:
375:
295:
146:
can be indicated by bracketing the front power unit — for example, the
736:
413:
649:
912:
878:
443:
423:
403:
385:
367:
337:
239:'goods train'). Also used to indicate shunting locomotives
132:
131:
The axles indicated by a single letter or number are mounted on a
122:
Consecutive non-driving axles, starting with 1 for a single axle.
76:. It is used in much of the world, notable exceptions being the
73:
653:
281:
The following examples are based on the UIC classification:
150:, 4-8-8-4 in Whyte notation, is (2′D)D2′ in UIC notation.
605:. Paris, France: International union of railways. 2021.
534:, essentially another simplification of the UIC system.
1110:
1066:
961:
877:
783:
750:
688:
30:For the UIC system of classifying locomotives, see
50:UIC classification of locomotive axle arrangements
402:idle axle mounted in a bogie (Whyte notation:
665:
503:UIC identification marking for tractive stock
32:UIC identification marking for tractive stock
8:
87:The classification system is managed by the
488:Swiss locomotive and railcar classification
262:
248:
234:
192:
178:
672:
658:
650:
581:Kalla-Bishop P.M. & Greggio, Luciano,
526:In United Kingdom and North America, the
542:
519:
552:. Leicester: Silverdale, 2000. p. 52.
99:The UIC uses the following structure:
595:
593:
591:
498:UIC classification of railway coaches
43:UIC classification of railway coaches
7:
493:UIC classification of goods wagons
39:UIC classification of goods wagons
25:
1163:Locomotive classification systems
1168:Locomotives by wheel arrangement
1158:International Union of Railways
953:Schwartzkopff-Eckhardt II bogie
478:International Union of Railways
89:International Union of Railways
172:h: superheated steam (German:
1:
186:n: saturated steam (German:
256:S: fast passenger (German:
219:tr: tram (urban) locomotive
210:number: number of cylinders
1194:
253:'passenger train')
36:
29:
888:AAR type A switcher truck
585:, Crescent, 1985, p. 226.
483:List of UIC country codes
52:, sometimes known as the
1173:Rail transport in Europe
1153:Rail transport standards
267:'express train')
224:Engerth-type locomotive
144:Articulated locomotives
928:Krauss-Helmholtz bogie
366:A locomotive with two
257:
243:
242:P: passenger (German:
229:
201:
187:
173:
943:Radial steering truck
760:AAR wheel arrangement
550:The Railway Data File
532:AAR wheel arrangement
468:AAR wheel arrangement
350:Southern Pacific 9010
200:v: compound (German:
148:Union Pacific Big Boy
54:German classification
770:Swiss classification
228:G: freight (German:
197:'wet steam')
183:'hot steam')
639:"Wheel Arrangement"
161:Garratt locomotives
1178:UIC classification
1018:Klien-Lindner axle
765:UIC classification
742:Dual Control Stand
103:Upper-case letters
18:UIC classification
1140:
1139:
1043:Road–rail vehicle
1028:Luttermöller axle
898:Articulated bogie
752:Wheel arrangement
583:Steam Locomotives
508:Wheel arrangement
473:Co-Co locomotives
266:
252:
238:
196:
182:
62:wheel arrangement
16:(Redirected from
1185:
913:Cleminson system
674:
667:
660:
651:
646:
624:
623:
621:
619:
597:
586:
579:
573:
567:
561:
547:
535:
524:
264:
261:
250:
247:
236:
233:
194:
191:
180:
177:
60:, describes the
21:
1193:
1192:
1188:
1187:
1186:
1184:
1183:
1182:
1143:
1142:
1141:
1136:
1106:
1062:
1003:Equalising beam
957:
873:
779:
746:
693:
684:
678:
637:Krebs, Gunter.
636:
633:
628:
627:
617:
615:
613:
599:
598:
589:
580:
576:
568:
564:
548:
544:
539:
538:
525:
521:
516:
464:
279:
215:tank locomotive
114:traction motors
97:
46:
35:
28:
23:
22:
15:
12:
11:
5:
1191:
1189:
1181:
1180:
1175:
1170:
1165:
1160:
1155:
1145:
1144:
1138:
1137:
1135:
1134:
1129:
1124:
1118:
1116:
1113:exhaust system
1108:
1107:
1105:
1104:
1099:
1094:
1089:
1084:
1079:
1073:
1071:
1068:Exhaust system
1064:
1063:
1061:
1060:
1055:
1050:
1048:Trailing wheel
1045:
1040:
1035:
1030:
1025:
1020:
1015:
1010:
1005:
1000:
995:
990:
988:Carrying wheel
985:
983:Beugniot lever
980:
975:
969:
967:
959:
958:
956:
955:
950:
948:Scheffel bogie
945:
940:
935:
930:
925:
920:
915:
910:
905:
900:
895:
890:
884:
882:
875:
874:
872:
871:
866:
861:
856:
851:
846:
841:
836:
831:
826:
821:
816:
811:
806:
801:
796:
790:
788:
781:
780:
778:
777:
775:Whyte notation
772:
767:
762:
756:
754:
748:
747:
745:
744:
739:
734:
729:
724:
719:
714:
709:
703:
701:
686:
685:
679:
677:
676:
669:
662:
654:
648:
647:
632:
631:External links
629:
626:
625:
611:
587:
574:
562:
541:
540:
537:
536:
528:Whyte notation
518:
517:
515:
512:
511:
510:
505:
500:
495:
490:
485:
480:
475:
470:
463:
460:
459:
458:
450:
447:
440:
437:
430:
427:
420:
417:
410:
407:
392:
389:
382:
379:
372:JNR Class EF58
364:
361:
358:
353:
346:
341:
334:
331:
328:
323:
319:
314:
310:
307:
304:
299:
292:
289:
286:
278:
275:
271:
270:
269:
268:
254:
240:
226:
220:
217:
211:
208:
205:
198:
184:
168:
167:Other suffixes
158:
157:
154:
151:
139:
136:
129:
123:
120:
117:
110:
109:Lower-case "o"
107:
104:
96:
93:
78:United Kingdom
70:multiple units
27:Classification
26:
24:
14:
13:
10:
9:
6:
4:
3:
2:
1190:
1179:
1176:
1174:
1171:
1169:
1166:
1164:
1161:
1159:
1156:
1154:
1151:
1150:
1148:
1133:
1130:
1128:
1125:
1123:
1120:
1119:
1117:
1114:
1109:
1103:
1100:
1098:
1095:
1093:
1090:
1088:
1085:
1083:
1080:
1078:
1075:
1074:
1072:
1069:
1065:
1059:
1056:
1054:
1051:
1049:
1046:
1044:
1041:
1039:
1036:
1034:
1031:
1029:
1026:
1024:
1023:Leading wheel
1021:
1019:
1016:
1014:
1011:
1009:
1008:Gölsdorf axle
1006:
1004:
1001:
999:
998:Driving wheel
996:
994:
993:Coupled wheel
991:
989:
986:
984:
981:
979:
976:
974:
971:
970:
968:
965:
960:
954:
951:
949:
946:
944:
941:
939:
936:
934:
931:
929:
926:
924:
921:
919:
918:Grovers bogie
916:
914:
911:
909:
906:
904:
901:
899:
896:
894:
893:Arnoux system
891:
889:
886:
885:
883:
880:
876:
870:
867:
865:
862:
860:
857:
855:
852:
850:
847:
845:
842:
840:
837:
835:
832:
830:
827:
825:
822:
820:
817:
815:
812:
810:
807:
805:
804:Bagnall–Price
802:
800:
797:
795:
792:
791:
789:
786:
782:
776:
773:
771:
768:
766:
763:
761:
758:
757:
755:
753:
749:
743:
740:
738:
735:
733:
730:
728:
725:
723:
720:
718:
715:
713:
710:
708:
705:
704:
702:
700:
696:
691:
687:
682:
675:
670:
668:
663:
661:
656:
655:
652:
644:
640:
635:
634:
630:
614:
612:9782746125209
608:
604:
603:
596:
594:
592:
588:
584:
578:
575:
572:
566:
563:
559:
558:1-85605-499-3
555:
551:
546:
543:
533:
529:
523:
520:
513:
509:
506:
504:
501:
499:
496:
494:
491:
489:
486:
484:
481:
479:
476:
474:
471:
469:
466:
465:
461:
456:
451:
448:
445:
441:
438:
435:
431:
428:
425:
421:
418:
415:
411:
408:
405:
401:
397:
393:
390:
387:
383:
380:
377:
373:
369:
365:
362:
359:
357:
354:
351:
347:
345:
342:
339:
335:
332:
329:
327:
324:
320:
318:
315:
311:
308:
305:
303:
300:
297:
293:
290:
287:
284:
283:
282:
276:
274:
259:
255:
245:
241:
231:
227:
225:
221:
218:
216:
212:
209:
207:Turb: turbine
206:
203:
199:
189:
185:
175:
171:
170:
169:
166:
165:
164:
162:
155:
153:Plus sign "+"
152:
149:
145:
140:
137:
134:
130:
127:
124:
121:
118:
115:
111:
108:
105:
102:
101:
100:
94:
92:
90:
85:
83:
82:North America
79:
75:
71:
67:
63:
59:
58:German system
55:
51:
44:
40:
33:
19:
1038:Railway tire
964:running gear
923:Jacobs bogie
903:Bissel truck
764:
692:positioning
643:SkyRocket.de
642:
616:. Retrieved
601:
582:
577:
570:
565:
549:
545:
522:
322:arrangement.
280:
272:
159:
126:Prime symbol
98:
86:
57:
53:
49:
47:
1053:Train wheel
1033:Radial axle
1013:Journal box
933:Mason Bogie
869:Walschaerts
707:Cab forward
569:Peck C.B.,
244:Personenzug
138:Parentheses
66:locomotives
1147:Categories
973:Adams axle
938:Pony truck
908:Blomberg B
864:Stephenson
849:Kuhn slide
785:Valve gear
717:Steeplecab
695:Short hood
681:Locomotive
618:23 October
514:References
374:, and the
363:(2Co)(Co2)
285:(A1A)(A1A)
258:Schnellzug
1122:Blastpipe
839:Hackworth
732:Cowl unit
727:Hood unit
712:Sharknose
699:Long hood
429:1′E1′h2Gt
326:Bo′Bo′Bo′
188:Nassdampf
174:Heißdampf
95:Structure
1127:Smokebox
1115:elements
1092:Lemaître
1058:Wheelset
966:elements
859:Southern
819:Caprotti
722:Cab unit
462:See also
449:D′Dh4vtG
419:2′D1′h3S
400:trailing
309:Bo′(A1A)
277:Examples
230:Güterzug
1132:Chimney
1111:Common
1102:Lemprex
1082:Kylchap
978:Axlebox
834:Gresley
814:Bulleid
809:Baguley
455:0-8-8-0
439:1′Dn4vP
434:2-10-2T
396:leading
376:PRR GG1
313:motors.
296:0-4-4-0
265:
251:
237:
202:Verbund
195:
181:
119:Numbers
91:(UIC).
1097:Lempor
1087:Kylpor
962:Other
737:Boxcab
683:design
609:
556:
414:0-10-0
368:bogies
356:Co′Co′
317:Bo′Bo′
1077:Giesl
1070:types
881:types
879:Bogie
854:Lentz
829:Gooch
799:Baker
794:Allan
787:types
444:2-8-0
424:4-8-2
404:2-8-2
391:1′D1′
386:0-8-0
338:0-6-0
133:bogie
128:" ′ "
74:trams
620:2021
607:ISBN
554:ISBN
394:One
344:C′C′
302:B′B′
263:lit.
249:lit.
235:lit.
193:lit.
179:lit.
80:and
72:and
48:The
41:and
844:Joy
824:Gab
690:Cab
457:T).
222:E:
213:t:
64:of
56:or
1149::
697:/
641:.
590:^
446:).
436:).
426:).
416:).
406:).
388:).
340:).
291:BB
260:,
246:,
232:,
190:,
176:,
84:.
68:,
673:e
666:t
659:v
645:.
622:.
560:.
409:E
381:D
378:.
352:.
333:C
298:)
204:)
135:.
116:.
45:.
34:.
20:)
Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.