100:
increasing the heating surface area and steam generation capacity of the boiler, and therefore its power. The concept was soon improved to provide radial lateral movement by placing the pair of trailing wheels and their axle in a fabricated sub-frame or truck, usually with outside bearings as they gave the best lateral riding stability. One-piece cast-steel trailer trucks were developed about 1915, to provide the additional strength for a booster engine to be fitted to the trailing axle. Finally, about 1921 the Delta trailing truck was developed with an inverted-rocker centering device at the rear ends of the truck frame. Delta trucks were soon enlarged to carry four trailing wheels, and later six.
104:
53:
42:
99:
Trailing wheels first appeared on
American locomotives between 1890 and 1895, but their axle worked in rigid pedestals. It enabled boilers to be lowered, since the top of the main frames was dropped down behind the driving wheels and under the firebox. The firebox could also be longer and wider,
95:
Trailing wheels were used in some early locomotives but fell out of favor for a time during the latter 19th century. As demand for more powerful locomotives increased, trailing wheels began to be used to support the crew cab and rear firebox area.
387:
213:
392:
294:
92:
was mounted on the trailing truck to provide extra tractive effort when starting a heavy train and at low speeds on gradients.
416:
260:
735:
690:
575:
436:
287:
137:
In the Whyte notation the number designates the number of wheels rather than the number of axles, thus the final
17:
451:
456:
426:
208:
280:
108:
84:) located behind the driving wheels. The axle of the trailing wheels is usually located in a trailing
46:
680:
510:
81:
160:
586:
550:
491:
775:
665:
565:
486:
382:
203:
153:
103:
754:
461:
650:
8:
481:
441:
134:
American type had no trailing wheels and were designated with a zero in the final place.
714:
640:
431:
364:
191:
118:, trailing wheels are designated by the last numbers in the series. For example, the
520:
374:
256:
178:
167:
476:
421:
312:
61:
630:
724:
625:
182:
35:
719:
709:
610:
605:
570:
466:
446:
397:
218:
148:
The highest number of trailing wheels on a single locomotive is six as seen on
127:
123:
115:
89:
535:
769:
699:
645:
620:
615:
540:
515:
52:
660:
545:
525:
185:
239:
The Steam
Locomotive in America - Its Development in the Twentieth Century
675:
655:
635:
555:
329:
194:
system, the number of axles rather than the number of wheels is counted.
171:
595:
560:
530:
471:
407:
339:
317:
303:
107:
A "Delta" type trailing truck, fabricated using a one-piece casting by
744:
354:
349:
334:
321:
31:
272:
749:
344:
704:
600:
164:
149:
141:
in the Mikado's 2-8-2 refers to two wheels (one axle) while the
359:
41:
501:
175:
157:
142:
131:
119:
85:
73:
27:
Unpowered locomotive wheel located rear of the driving wheels
253:
Uncle Sam's
Locomotives: The USRA and the Nation's Railroads
77:
130:, and two trailing wheels. Some locomotives such as the
145:
4-8-4 designation refers to four wheels (two axles).
241:
New York, U.S.A. : Bonanza Books. p239-40, 256-57
250:
214:UIC classification of locomotive axle arrangements
767:
56:A cross-sectional view of a rigid trailing truck
288:
295:
281:
255:. Indiana University Press. p. 40.
102:
51:
40:
251:Huddlestone, Eugene L; George M Smerk.
14:
768:
302:
276:
24:
25:
787:
576:Schwartzkopff-Eckhardt II bogie
122:Mikado type locomotive had two
88:. On some large locomotives, a
45:The trailing wheels (boxed) on
244:
231:
13:
1:
224:
7:
209:Steam locomotive components
197:
10:
792:
109:Commonwealth Steel Company
72:is generally an unpowered
47:Pennsylvania Railroad 1737
29:
733:
689:
584:
511:AAR type A switcher truck
500:
406:
373:
311:
30:Not to be confused with
152:Allegheny type and the
551:Krauss-Helmholtz bogie
170:, as well as numerous
111:
57:
49:
566:Radial steering truck
383:AAR wheel arrangement
237:Alfred W Bruce.(1952)
204:AAR wheel arrangement
154:Pennsylvania Railroad
106:
55:
44:
393:Swiss classification
641:Klien-Lindner axle
388:UIC classification
365:Dual Control Stand
192:UIC classification
168:duplex locomotives
112:
58:
50:
763:
762:
666:Road–rail vehicle
651:Luttermöller axle
521:Articulated bogie
375:Wheel arrangement
179:Thuile locomotive
174:locomotives, the
16:(Redirected from
783:
536:Cleminson system
297:
290:
283:
274:
273:
267:
266:
248:
242:
235:
62:steam locomotive
21:
791:
790:
786:
785:
784:
782:
781:
780:
766:
765:
764:
759:
729:
685:
626:Equalising beam
580:
496:
402:
369:
316:
307:
301:
271:
270:
263:
249:
245:
236:
232:
227:
200:
143:Northern type's
39:
36:Training wheels
28:
23:
22:
15:
12:
11:
5:
789:
779:
778:
761:
760:
758:
757:
752:
747:
741:
739:
736:exhaust system
731:
730:
728:
727:
722:
717:
712:
707:
702:
696:
694:
691:Exhaust system
687:
686:
684:
683:
678:
673:
671:Trailing wheel
668:
663:
658:
653:
648:
643:
638:
633:
628:
623:
618:
613:
611:Carrying wheel
608:
606:Beugniot lever
603:
598:
592:
590:
582:
581:
579:
578:
573:
571:Scheffel bogie
568:
563:
558:
553:
548:
543:
538:
533:
528:
523:
518:
513:
507:
505:
498:
497:
495:
494:
489:
484:
479:
474:
469:
464:
459:
454:
449:
444:
439:
434:
429:
424:
419:
413:
411:
404:
403:
401:
400:
398:Whyte notation
395:
390:
385:
379:
377:
371:
370:
368:
367:
362:
357:
352:
347:
342:
337:
332:
326:
324:
309:
308:
300:
299:
292:
285:
277:
269:
268:
261:
243:
229:
228:
226:
223:
222:
221:
219:Whyte notation
216:
211:
206:
199:
196:
128:driving wheels
124:leading wheels
116:Whyte notation
90:booster engine
66:trailing wheel
26:
18:Trailing truck
9:
6:
4:
3:
2:
788:
777:
774:
773:
771:
756:
753:
751:
748:
746:
743:
742:
740:
737:
732:
726:
723:
721:
718:
716:
713:
711:
708:
706:
703:
701:
698:
697:
695:
692:
688:
682:
679:
677:
674:
672:
669:
667:
664:
662:
659:
657:
654:
652:
649:
647:
646:Leading wheel
644:
642:
639:
637:
634:
632:
631:Gölsdorf axle
629:
627:
624:
622:
621:Driving wheel
619:
617:
616:Coupled wheel
614:
612:
609:
607:
604:
602:
599:
597:
594:
593:
591:
588:
583:
577:
574:
572:
569:
567:
564:
562:
559:
557:
554:
552:
549:
547:
544:
542:
541:Grovers bogie
539:
537:
534:
532:
529:
527:
524:
522:
519:
517:
516:Arnoux system
514:
512:
509:
508:
506:
503:
499:
493:
490:
488:
485:
483:
480:
478:
475:
473:
470:
468:
465:
463:
460:
458:
455:
453:
450:
448:
445:
443:
440:
438:
435:
433:
430:
428:
427:Bagnall–Price
425:
423:
420:
418:
415:
414:
412:
409:
405:
399:
396:
394:
391:
389:
386:
384:
381:
380:
378:
376:
372:
366:
363:
361:
358:
356:
353:
351:
348:
346:
343:
341:
338:
336:
333:
331:
328:
327:
325:
323:
319:
314:
310:
305:
298:
293:
291:
286:
284:
279:
278:
275:
264:
262:0-253-34086-1
258:
254:
247:
240:
234:
230:
220:
217:
215:
212:
210:
207:
205:
202:
201:
195:
193:
188:
187:
184:
181:and the 4-6-6
180:
177:
173:
169:
166:
162:
161:steam turbine
159:
155:
151:
146:
144:
140:
135:
133:
129:
125:
121:
117:
110:
105:
101:
97:
93:
91:
87:
83:
79:
75:
71:
70:trailing axle
67:
63:
54:
48:
43:
37:
33:
19:
776:Train wheels
670:
661:Railway tire
587:running gear
546:Jacobs bogie
526:Bissel truck
315:positioning
252:
246:
238:
233:
189:
186:DRG Class 61
147:
138:
136:
113:
98:
94:
69:
65:
59:
676:Train wheel
656:Radial axle
636:Journal box
556:Mason Bogie
492:Walschaerts
330:Cab forward
172:Mason Bogie
596:Adams axle
561:Pony truck
531:Blomberg B
487:Stephenson
472:Kuhn slide
408:Valve gear
340:Steeplecab
318:Short hood
304:Locomotive
225:References
745:Blastpipe
462:Hackworth
355:Cowl unit
350:Hood unit
335:Sharknose
322:Long hood
32:Tailwheel
770:Category
750:Smokebox
738:elements
715:Lemaître
681:Wheelset
589:elements
482:Southern
442:Caprotti
345:Cab unit
198:See also
126:, eight
82:wheelset
755:Chimney
734:Common
725:Lemprex
705:Kylchap
601:Axlebox
457:Gresley
437:Bulleid
432:Baguley
190:In the
165:6-4-4-6
150:2-6-6-6
114:In the
720:Lempor
710:Kylpor
585:Other
360:Boxcab
306:design
259:
700:Giesl
693:types
504:types
502:Bogie
477:Lentz
452:Gooch
422:Baker
417:Allan
410:types
176:4-4-6
158:6-8-6
132:4-4-0
120:2-8-2
86:truck
74:wheel
60:On a
257:ISBN
163:and
78:axle
64:, a
467:Joy
447:Gab
313:Cab
156:'s
76:or
68:or
34:or
772::
320:/
296:e
289:t
282:v
265:.
183:T
139:2
80:(
38:.
20:)
Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
