588:
manufactured by Peco are now available from the EM Gauge
Society. Kits for doing this are also available from the aforementioned sources amongst others. Several of these kits are also available to the OO modeller who aims for more realistic track since most RTR track is actually scaled to HO and does not represent any British prototype, and the sleeper spacing is too close for scale. EM gauge has slightly overscale flanges and flangeways on point and crossing work; P4 is closer to scale but the smaller flanges and flangeways on P&C work expose poor track construction.
471:
568:
505 mm, 4 = 571.5 mm). Overhang from long vehicles means that the normal separation between track centres are overscale to prevent collisions on curves between stock on adjacent lines, at up to 65 mm (for set-track (reduced down to 50 mm for Peco
Streamline)). Overscale wheel width and deep wheel flanges are used on typical models (but particularly older models), and these require overscale rail profile and much larger clearances on
459:
332:
than their
European and North American counterparts. A quick and cheap solution was to enlarge the scale of the model to 4 mm-to-the-foot but keep the 3.5 mm-to-the-foot gauge track. This also allowed more space to model the external valve gear. The resulting HO track gauge of 16.5 mm represents 4 feet 1.5 inches at 4 mm-to-the-foot scale; this is 7 inches under scale, or approximately 2.33 mm too narrow.
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In common with most practical model railways of any scale (and not related to the OO gauge inaccuracy) the following compromises are made: Curves are often sharper than the prototype, and often not transitioned, particularly when using "set-track" systems (radius 1 = 371 mm, 2 = 438 mm, 3 =
331:
OO describes models with a scale of 4 mm = 1 foot (1:76) running on HO scale 1:87 (3.5 mm = 1 foot) track (16.5 mm/0.650 in). This combination came about as early clockwork mechanisms and electric motors were difficult to fit within HO scale models of
British trains, which are smaller
357:
introduced a range of OO models in 1938. Soon other companies followed but it did not prove popular and remained on the market only until 1942, when Lionel train production was shut down due to wartime restrictions to the use of steel. OO gauge was quickly eclipsed by the better-proportioned HO
587:
Whilst flextrack is available for both EM and P4 gauges (from manufacturers such as C&L Finescale, SMP and The P4 Track
Company), ready-to-run (RTR) point and crossing (P&C) work is not available, so this trackwork must be constructed by the modeller, although RTR turnouts in EM gauge
705:– Bought the Kitmaster range and sold it under the Airfix brand until the original Airfix company collapsed in 1981. Some of the tooling was then destroyed, but Dapol (q.v.) bought the remainder. Most Airfix military vehicles are also to 1:76 scale.
525:). This difference is particularly noticeable when looking along the track. As the market for proprietary track is mostly for HO scale, sleeper size and spacing are designed for HO and are therefore underscale.
314:) track and scaled at 4 mm-to-the-foot. In 1922, the first models of British prototypes appeared. Initially all locomotives were powered by clockwork, but the first electric power appeared in autumn 1923.
580:
Many experienced modellers find the OO standard produces a "narrow gauge" appearance when the model is viewed head on. Greater accuracy is possible using either EM gauge or the closer-to-exact scale
386:
OO remains the most popular scale for railway modelling in Great
Britain due to a ready availability of ready-to-run stock and starter sets. Ready-to-run in the UK is dominated by
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Though they run on the same track, OO gauge and HO gauge models of the same prototype do not sit well together since the OO models are larger than the HO equivalent.
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standards (4 mm to 1 ft (304.8 mm), or 1:76.2), and the only one to be marketed by major manufacturers. The OO track gauge of
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64:
350:. The combination of 4 mm scale and 16.5 mm gauge has remained the UK's most popular scale and gauge ever since.
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686:) track with ordinary OO wheelsets. Allows the tighter trackwork tolerances of EM without the need to re-gauge wheels.
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company. Trix decided to use the new HO standard, being approximately half of
European 0 gauge (1:43 scale).
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standard in the United
Kingdom, outside of which it is virtually unknown. OO gauge is one of several
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inch) track gauge, equating to 57 inches or 4 ft 9 in – very close to the 4 ft 8
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In 1932, the Bing company collapsed, but the Table
Railway continued to be manufactured by the new
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standard gauge. However, since the 1960s, other gauges in the same scale have arisen—18.2 mm (
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564:. Nevertheless, it is possible to model using OO to standards that fall just short of finescale.
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378: in of standard gauge. There is a small following of American OO scale today.
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than is prototypical. Pointwork is often compressed in length to save space.
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Bachmann
Branchline – One of the largest manufacturers of ready-to-run OO.
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Company launched a new range of OO models under the trade name of
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726:– One of the largest manufacturers of ready-to-run OO.
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These differences have led to the development of the
732:– Produced budget OO ready-to-run, bought by Hornby.
675:) gauge track (accurate scale standard gauge track).
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462:OO scale (left) and HO scale (right) models of the
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67:. Unsourced material may be challenged and removed.
30:"00 gauge" redirects here. For the wire gauge, see
446:. Other scales, with the possible exception of
358:scale. The Lionel range of OO used 19 mm (
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474:OO scale permits a level of detail including
8:
306:in 1921 as "The Table Railway", running on
840:
826:
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639:) narrow gauge railways in 4 mm scale
625:) narrow gauge railways in 4 mm scale
153:U.K. prototype model of a OO scale (1:76)
147:
127:Learn how and when to remove this message
748:
247:) corresponds to prototypical gauge of
302:scale model railways were launched by
138:
7:
157:shown with five pence coin for scale
65:adding citations to reliable sources
645:– 3.5 mm scale using the same
536:) Irish gauge, where it is a scale
25:
550:inches (343 mm) too narrow.
528:OO is also used to represent the
1246:
1245:
41:
603:Rail transport modelling scales
52:needs additional citations for
808:The Double O Gauge Association
785:The Double O Gauge Association
667:P4 – A set of standards using
466:, showing the size difference.
1:
1068:Standard gauge railway scales
1130:Narrow gauge railway scales
761:www.world-of-railways.co.uk
656:EM – 4 mm scale using
1298:
597:Other model railway scales
325:Flying Scotsman locomotive
29:
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478:and individual numbering.
146:
757:"OO - World Of Railways"
576:4 mm finescale standards
530:5 ft 3 in
479:
467:
412:Hattons Model Railways
353:In the United States,
328:
224:) is the most popular
1277:Model railroad scales
631:– Used for modelling
617:– Used for modelling
473:
461:
327:on an OO gauge layout
320:
287:) and 18.83 mm (
155:British Rail Class 25
653:) gauge track as OO.
454:Scaling and accuracy
243:) (same as the 1:87
61:improve this article
27:Model railroad gauge
813:History of 00 gauge
558:finescale standards
392:Bachmann Branchline
32:American wire gauge
1282:Scale model scales
480:
468:
428:Planet Industrials
355:Lionel Corporation
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1225:Diecast Collector
444:Mainline Railways
434:, and previously
432:Dave Jones Models
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678:00-SF – Uses
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669:18.83 mm
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72:Find sources:
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50:This article
48:
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38:
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19:
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992:1:18 diecast
878:Construction
788:. Retrieved
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764:. Retrieved
760:
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680:16.2 mm
658:18.2 mm
651:0.65 in
647:16.5 mm
586:
579:
566:
562:P4 standards
555:
552:
527:
487:0.65 in
483:16.5 mm
481:
464:EMD Class 66
420:Sonic Models
385:
352:
348:Hornby Dublo
341:
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312:0.65 in
308:16.5 mm
299:
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241:0.65 in
237:16.5 mm
221:
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189:0.65 in
185:16.5 mm
166:4 mm to 1 ft
123:
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97:
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59:Please help
54:verification
51:
781:"Standards"
637:914 mm
623:610 mm
424:Accurascale
181:Model gauge
172:Scale ratio
1272:4 mm scale
1266:Categories
1214:Port Revel
1199:Kitbashing
961:Matchstick
790:2022-03-31
766:2022-03-31
743:References
476:weathering
233:4 mm-scale
117:April 2022
87:newspapers
76:"OO gauge"
1141:H0m scale
1136:H0e scale
1104:Protofour
944:Materials
935:Wargaming
888:Dollhouse
697:Kitmaster
633:3 ft
619:2 ft
570:pointwork
289:Scalefour
1251:Category
1219:Room box
1182:Aircraft
1099:OO scale
1094:HO scale
1089:TT scale
910:Military
863:Aircraft
856:Products
664:) track.
592:See also
519: in
408:ViTrains
382:OO today
300:Double-0
245:HO scale
222:00 scale
218:00 gauge
214:OO scale
210:OO gauge
142:OO gauge
18:OO scale
1161:V scale
1124:1 scale
1119:O scale
1114:G scale
1109:S scale
1084:N scale
1079:Z scale
1074:T gauge
966:Plastic
956:Diecast
930:Railway
883:Diorama
584:track.
545:⁄
514:⁄
498:⁄
448:N gauge
373:⁄
363:⁄
344:Meccano
276:⁄
258:⁄
216:(also,
101:scholar
1194:Gundam
975:Scales
920:Rocket
898:Action
893:Figure
718:Heljan
703:Airfix
442:, and
400:Heljan
295:Origin
176:1:76.2
103:
96:
89:
82:
74:
1156:16 mm
1062:1:700
1057:1:500
1052:1:350
1047:1:285
1042:1:200
1037:1:144
951:Brass
915:Robot
905:Horse
712:Dapol
396:Dapol
267:4 ft
249:4 ft
163:Scale
108:JSTOR
94:books
1187:Cars
1146:Gn15
1032:1:72
1027:1:64
1022:1:50
1017:1:48
1012:1:43
1007:1:35
1002:1:32
997:1:24
987:1:18
982:1:12
925:Ship
873:Cars
736:Peco
730:Lima
629:OOn3
436:Lima
404:Peco
390:and
337:Trix
304:Bing
220:and
80:news
1151:On2
615:OO9
212:or
63:by
1268::
783:.
759:.
643:HO
582:P4
538:13
438:,
430:,
426:,
422:,
418:,
414:,
410:,
406:,
402:,
398:,
285:EM
281:in
263:in
841:e
834:t
827:v
793:.
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682:(
671:(
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649:(
635:(
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371:1
365:4
361:3
310:(
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269:8
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239:(
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187:(
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115:(
105:·
98:·
91:·
84:·
57:.
34:.
20:)
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