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is thus avoided, along with the loud, piercing, very high-pitched squeal which usually results from it – especially evident on curves in tunnels, stations and elevated track, due to flat surfaces slipping and flanges grinding along the rail. However, if the degree of conicality is inappropriate for
561:
of the rail vehicle, causing the wheelset to move towards the outer rail on the curve. The cone increases the effective diameter of the wheel as it moves towards the outer rail, and since the wheels are mounted rigidly on the axle, the outer wheels travel slightly farther, causing the wheelsets to
712:
755:
791:
837:
513:
have bogies each with two wheelsets, but three wheelsets (or more) are used in bogies of freight cars that carry heavy loads, and three-wheelset bogies are under some passenger cars. Four-wheeled
855:
740:
1320:
771:
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1325:
1227:
1191:
582:, built with cylindrical wheels and flat-topped rails, started to re-profile the wheels in 2016 with conical treads after years of complaints about the
411:
403:
457:
407:
571:
can occur at high speeds. Recent research is also showing that marginal changes to wheel and rail profiles can improve performance further.
911:
399:
525:
and their colonies have only two wheelsets; in recent decades such vehicles have become less common as trainloads have become heavier.
1155:
590:
used cylindrical wheels and vertical rails until the mid-1980s, when considerably higher train loads made the practice untenable.
395:
1181:"APTA PR-CS-RP-003-98 Recommended Practice for Developing a Clearance Diagram for Passenger Equipment 5.3.2.1 Design tolerances"
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1077:. Vol. 19, no. 210. Brisbane: Australian Railway Historical Society Queensland Division. p. 210.
1062:. Vol. 17, no. 189. Brisbane: Australian Railway Historical Society Queensland Division. p. 241.
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505:) – a pivoted frame assembly holding at least two wheelsets – at each end of the vehicle. Most modern
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1394:
926:
385:
1647:
1414:
1374:
1039:. Vol. XXV, no. 438. Burwood NSW: Australian Railway Historical Society. pp. 75–92.
587:
568:
360:
158:
765:. The wheels are pressed steel and the flanges are smaller than those of full-sized rail vehicles.
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685:
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538:
318:
1453:
1307:
1161:
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1139:
1127:
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1101:
1073:
Knowles, John (September 1983). "More on the
Queensland Railways and its cylindrical wheels".
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542:
1563:
1409:
1354:
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1020:
906:
901:
762:
711:
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284:
185:
168:
53:
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1558:
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651:
557:. Without the conical shape, a wheel would tend to continue in a straight path due to the
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237:
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217:
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1642:
1603:
1543:
1538:
1503:
1399:
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1106:
1035:
Knowles, J.W. (April 1974). "Radial wheeled rolling stock on the
Queensland Railways".
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252:
126:
45:
470:
1702:
1632:
1578:
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Knowles, John (December 1981). "The
Queensland Railways and its cylindrical wheels".
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The
American Railroad Freight Car: From the Wood-Car Era to the Coming of Steel
1528:
1493:
1463:
1404:
1340:
1272:
1250:
1236:
956:
891:
681:
553:. The rails generally slant inwards at 1 in 40, a lesser angle than the wheel
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136:
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outside of deep-flanged steel wheels, which guide the bogie through standard
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17:
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allowing both wheels to rotate together. Wheelsets are often mounted in a
30:"Wheel tread" redirects here. For distance between centers of wheels, see
1682:
1277:
689:
474:
A rail vehicle wheelset, comprising two wheels mounted rigidly on an axle
417:
998:"Taking the Long View: 20 years of Wheel/Rail Interaction (Part 2 of 2)"
979:"Taking the Long View: 20 years of Wheel/Rail Interaction (Part 1 of 2)"
1637:
1533:
814:
558:
1292:
670:
546:
518:
313:
1205:
1016:"The Four-Year Fight to Make San Francisco's Subway Stop Screaming"
1468:
1434:
643:
609:
494:
469:
212:
175:
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490:
279:
1209:
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pattern, which became standard in North
America and elsewhere
574:
Not all railroads have employed conical-tread wheels. The
562:
more efficiently follow the curve. Abnormal wear at the
541:
taper of about 1 in 20 to enable the wheelset to follow
549:
coming in contact with the rail sides, and to reduce
1666:
1622:
1517:
1433:
1339:
1306:
1244:
734:
are rigidly mounted on an axle to rotate in unison.
1105:
1002:Interface: The Journal of Wheel/Rail Interaction
983:Interface: The Journal of Wheel/Rail Interaction
1221:
451:
8:
1228:
1214:
1206:
1192:American Public Transportation Association
828:Wheelset of a two-rail funicular with the
813:Wheelset as part of a welded sculpture in
458:
444:
36:
27:Pair of railroad wheels fixed onto an axle
567:the suspension and track, an unpleasant
969:
707:
327:
271:
147:
79:
44:
1094:The Railroad Car Builder's Dictionary
7:
912:International Heavy Haul Association
1108:The American Railroad Passenger Car
614:rubber-tyred electric multiple unit
25:
517:that were once near-universal in
854:
836:
821:
806:
790:
770:
754:
739:
724:
710:
624:
602:
427:
52:
1509:Schwartzkopff-Eckhardt II bogie
669:feature special wheelsets with
586:by its passengers. Australia's
1148:Johns Hopkins University Press
1114:Johns Hopkins University Press
749:wheelsets with fitted journals
545:with less chance of the wheel
1:
977:Tuzik, Bob (8 January 2014).
243:Passenger traffic terminology
1092:Matthias N. Forney (1974) .
996:Tuzik, Bob (22 April 2014).
922:List of railroad truck parts
688:was originally conceived by
638:. 2: Gap (empty space). 3:
1730:
1096:. Dover Publications, Inc.
29:
1444:AAR type A switcher truck
356:List of high-speed trains
843:Funicular wheelset with
684:if a tyre deflates. The
680:and keep the train from
482: is a pair of
937:Rolling-element bearing
797:A freight bogie of the
258:Railway nationalization
1484:Krauss-Helmholtz bogie
747:Swiss Federal Railways
576:Bay Area Rapid Transit
489:mounted rigidly on an
475:
366:Longest train services
248:Named passenger trains
1499:Radial steering truck
1316:AAR wheel arrangement
848:rack and pinion brake
779:Great Western Railway
594:Specialised wheelsets
473:
381:Platform screen doors
1326:Swiss classification
947:Variable gauge axles
564:wheel–rail interface
434:Transport portal
386:Railway speed record
732:Railroad car wheels
667:rubber-tyred metros
588:Queensland Railways
529:Conical wheel-tread
361:List of train songs
238:High-speed railways
191:Couplers by country
40:Part of a series on
1574:Klien-Lindner axle
1321:UIC classification
1298:Dual Control Stand
1140:White, John H. Jr.
830:Abt switch turnout
777:A wheelset from a
476:
196:Coupler conversion
1696:
1695:
1599:Road–rail vehicle
1584:Luttermöller axle
1454:Articulated bogie
1308:Wheel arrangement
1112:. Baltimore, MD:
927:Luttermöller axle
781:wagon, showing a
678:railroad switches
634:twin wheelet. 1:
578:(BART) system in
468:
467:
186:Railway couplings
169:Steam locomotives
16:(Redirected from
1721:
1469:Cleminson system
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1060:Sunshine Express
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1005:
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907:Interference fit
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763:railroad speeder
761:Wheelset from a
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700:opened in 1956.
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551:curve resistance
484:railroad vehicle
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132:Gauge conversion
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37:
21:
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1699:
1698:
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1559:Equalising beam
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1302:
1249:
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1195:
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1086:Further reading
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621:
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272:Special systems
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233:Inter-city rail
218:Passenger train
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98:Railway station
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28:
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1700:
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1669:exhaust system
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1539:Beugniot lever
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1174:External links
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1564:Gölsdorf axle
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1554:Driving wheel
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1157:0-8018-4404-5
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1024:. 2016-09-02.
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1709:Train wheels
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1520:running gear
1479:Jacobs bogie
1459:Bissel truck
1248:positioning
1196:. Retrieved
1194:. 1998-03-26
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1059:
1053:
1036:
1030:
1019:
1010:
1001:
991:
982:
972:
863:rack railway
664:
573:
535:train wheels
532:
515:goods wagons
507:freight cars
479:
477:
207:
148:Service and
1609:Train wheel
1589:Radial axle
1569:Journal box
1489:Mason Bogie
1425:Walschaerts
1263:Cab forward
957:Wheel gauge
942:Train wheel
917:Journal box
718:Denney axle
694:Paris MĂ©tro
618:Paris MĂ©tro
569:oscillation
396:Terminology
341:Attractions
328:Miscellanea
164:Locomotives
122:Track gauge
115:Maintenance
32:Wheel track
18:Wheel tread
1703:Categories
1529:Adams axle
1494:Pony truck
1464:Blomberg B
1420:Stephenson
1405:Kuhn slide
1341:Valve gear
1273:Steeplecab
1251:Short hood
1237:Locomotive
1198:2015-01-17
1123:0801819652
964:References
892:Drop table
799:Bettendorf
698:first line
640:Guide rail
346:By country
297:Interurban
292:Light rail
137:Dual gauge
88:Management
1678:Blastpipe
1395:Hackworth
1288:Cowl unit
1283:Hood unit
1268:Sharknose
1255:Long hood
1045:0005-0105
952:Wheelbase
897:Flat spot
882:Beam axle
682:derailing
632:Translohr
371:Modelling
351:Companies
336:Accidents
159:Operating
93:Rail yard
1683:Smokebox
1671:elements
1648:Lemaître
1614:Wheelset
1522:elements
1415:Southern
1375:Caprotti
1278:Cab unit
1188:APTA.com
1166:26130632
1142:(1993).
1104:(1978).
1037:Bulletin
877:Axle box
870:See also
692:for the
690:Michelin
636:Pavement
480:wheelset
418:Vactrain
208:Wheelset
1688:Chimney
1667:Common
1658:Lemprex
1638:Kylchap
1534:Axlebox
1390:Gresley
1370:Bulleid
1365:Baguley
1132:2798188
815:Kharkiv
704:Gallery
616:of the
559:inertia
547:flanges
539:conical
537:have a
478:A
391:Suicide
376:Museums
307:History
285:History
263:Freight
65:History
1653:Lempor
1643:Kylpor
1518:Other
1293:Boxcab
1239:design
1164:
1154:
1130:
1120:
1043:
696:; the
686:system
671:rubber
652:Spring
648:Flange
584:squeal
543:curves
519:Europe
487:wheels
314:Maglev
176:Trains
1714:Bogie
1633:Giesl
1626:types
1437:types
1435:Bogie
1410:Lentz
1385:Gooch
1355:Baker
1350:Allan
1343:types
1184:(PDF)
1021:Wired
674:tyres
665:Some
654:. 7:
650:. 6:
646:. 5:
644:Resin
642:. 4:
612:of a
610:Bogie
533:Most
501:" in
499:truck
495:bogie
319:Urban
1162:OCLC
1152:ISBN
1128:OCLC
1118:ISBN
1041:ISSN
656:Tyre
555:cone
521:and
509:and
491:axle
280:Tram
103:list
1400:Joy
1380:Gab
1246:Cab
845:Abt
785:end
1705::
1253:/
1190:.
1186:.
1160:.
1150:.
1126:.
1116:.
1018:.
1000:.
981:.
497:("
412:UK
410:,
408:NZ
406:,
404:NA
402:,
400:AU
1229:e
1222:t
1215:v
1201:.
1168:.
1134:.
1047:.
1004:.
985:.
658:.
459:e
452:t
445:v
414:)
398:(
34:.
20:)
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