BR diesel and electric bogie loco wheel and wheelbase information
by Ted Scannell, Keith Norgrove, Simon Bendall, Alan Monk and Russ Elliott
Drawn and edited by Russ Elliott
Locos
General notes:
- wheel diameters are quoted for new wheels
- prototype dimensions are quoted in imperial or metric units to align with their original specification where possible
Explanation of symbols:
| a | distance between midpoints of bogies (for B-B and Bo-Bo) or between centre axles for 3-axle bogies (please note that the points of this dimension may not be the same as the bogie pivot points – see relevant footnotes) |
| b | Bo-Bo (or B-B) bogie wheelbase |
| c1 | outer to centre axle distance on 3-axle bogies |
| c2 | centre to inner axle distance on 3-axle bogies |
| c3 | outer powered axle to pony distance on 1Co-Co1 configuration |
| d | powered wheel diameter |
| dc | carrying wheel diameter (either a pony or the centre wheel on the bogies of an A1A-A1A) |
| TOPS class | Pre-TOPS number (class) | Wheel arrangement | Wheelbase dimensions | Wheel diameters | Wheel type | |||||
| a | b | c1 | c2 | c3 | d | dc | ||||
| - | 26500/1 (ES1) 1 | Bo-Bo | 20 '6" | 6 '6" | - | - | - | 3' 0" | - | disc (?) |
| - | 26510 etc (EB1, EF1) 1 | Bo-Bo | 18' 3" | 8' 9" | - | - | - | 4' 0" | - | 12 (?)-spoke |
| - | 10000/1 | Co-Co | 35' 2" 2 | - | 8' 0" | 7' 8" | - | 3' 6" | - | disc |
| - | 10201/2/3 | 1Co-Co1 | 28' 6" | - | 8' 0" | 8' 0" | 5' 6" | 3' 7" | 3' 1" | disc |
| - | 10800 | Bo-Bo | 22' 6" | 8' 6" | - | - | - | 3' 6" | - | disc |
| - | 18000 | A1A-A1A | 38' 0 ¾" | - | 5' 10 ⅞" | 5' 10 ⅞" | - | 4' 0 ½" | 3' 2" | 14-spoke 3 |
| - | 18100 4 | Co-Co | 37' 6" | - | 7' 6" | 7' 6" | - | 3' 8" | - | disc |
| 15 | D8200-43 | Bo-Bo | 22' 6" | 8' 6" | - | - | - | 3' 3" 5 | - | disc |
| 16 | D8400-9 | Bo-Bo | 20 '0" | 8' 6" | - | - | - | 3' 7" | - | 10-spoke 3 |
| 17 | D8500-616 | Bo-Bo | 28' 0" | 8' 6" | - | - | - | 3' 3 ¾" | - | disc |
| 20 | D8000-99/8300-27 | Bo-Bo | 24' 0" | 8' 6" | - | - | - | 3' 7" | - | disc |
| 21, 29 | D6100-57 | Bo-Bo | 28' 6" | 8' 6" | - | - | - | 3' 7" | - | 11-spoke 3 |
| 22 | D6300-57 | B-B | 23' 0" | 8' 6" | - | - | - | 3' 7" | - | 11-spoke 3 |
| 23 | D5900-9 | Bo-Bo | 32' 0" | 8' 6" | - | - | - | 3' 7" | - | disc |
| 24, 25 | D5000-99/7500-677 | Bo-Bo | 28' 0" | 8'6" | - | - | - | 3' 9" | - | disc |
| 26, 27 | D5300-415 | Bo-Bo | 29' 0" | 10' 0" | - | - | - | 3' 7" | - | disc |
| 28 | D5700-19 | Co-Bo | 32' 5" 6 | 8' 6" | 5' 11" 7 | 6' 2 ½" 7 | - | 3' 3 ½" | - | disc |
| 30, 31 | D5500-699/5800-62 | A1A-A1A | 28' 10" | - | 7' 0" | 7' 0" | - | 3' 7" | 3' 3 ½" | disc |
| 33 | D6500-97 | Bo-Bo | 29' 0" | 10' 0" | - | - | - | 3' 7" | - | disc |
| 35 | D7100-100 | B-B | 25' 6" | 10' 6" | - | - | - | 3' 9" | - | disc |
| 37 | D6600-8/6700-999 | Co-Co | 37' 2" | - | 6' 9" | 6' 9" | - | 3' 7" 8 | - | disc |
| 40 | D200-399 | 1Co-Co1 | 34' 3" 9 | - | 8' 0" | 8' 0" | 5' 6" | 3' 9" | 3' 0" | disc |
| 41 | D600-4 | A1A-A1A | 35' 0" | - | 7' 6" | 7' 6" | - | 3' 7" | 3'3 ½" | 11-spoke 10 |
| 42, 43 | D800-70 | B-B | 37' 9" | 10' 6" | - | - | - | 3' 3 ½" | - | disc |
| HST41, 43 | - | Bo-Bo | 10300mm | 2600mm | - | - | - | 1020mm | - | disc |
| 44, 45, 46 | D1-193 | 1Co-Co1 | 32' 8" | - | 8' 0" | 8' 0" | 5' 6" | 3' 9" | 3' 0" | disc |
| 47, 48 | D1500-999 | Co-Co | 37' 0" | - | 7' 3" | 7' 3" | - | 3' 9" | - | disc |
| 50 | D400-49 | Co-Co | 42' 8" | - | 6' 9" | 6' 9" | - | 3' 7" | - | disc |
| 52 | D1000-73 | C-C | 42' 6" | - | 6' 1" | 6' 1" | - | 3' 7" | - | disc |
| - (Lion) | D0260 | Co-Co | 36' 3" | - | 7' 3" | 7' 3" | - | 3' 9" | - | disc |
| 53 (Falcon) | D0280/D1200 | Co-Co | 42' 0" | - | 7' 2" | 7' 9" | - | 3' 7" | - | disc |
| - | Deltic (prototype) | Co-Co | 44' 0" | - | 7' 2" | 7' 2" | - | 3' 7" | - | disc |
| - | DP2 | Co-Co | 45' 0" | - | 6' 9" | 6' 9" | - | 3' 7" | - | disc |
| 55 | D9000-21 | Co-Co | 45' 0" | - | 6' 9" | 6' 9" | - | 3' 7" | - | disc |
| - (Kestrel) | HS4000 11 | Co-Co | 37' 2" | - | 7' 3" | 7' 8" | - | 3' 7" | - | disc |
| 56 | - | Co-Co | 37' 8" 12 | - | 6' 4 ¾" | 7' 0 ¾" | - | 3' 9" | - | disc |
| 57 | - | Co-Co | 37' 0" | - | 7' 3" | 7' 3" | - | 3' 9" | - | disc |
| 58 | - | Co-Co | 10800mm 13 | - | 2030mm | 2150mm | - | 1120mm | - | disc |
| 59 | - | Co-Co | 43' 6" | - | 6' 7 ¼" | 6' 11 ¾" | - | 3' 6" 14 | - | disc |
| 60 | - | Co-Co | 42' 9 ¾" | - | 6' 9 ¼" | 6' 9 ¼" | - | 3' 7" | - | disc |
| 66 | - | Co-Co | 43' 6" | - | 6' 7 ¼" | 6' 11 ¾" | - | 1120mm 15 | - | disc |
| 67 | - | Bo-Bo | 38' 1" 16 | 9' 2" 16 | - | - | - | 3' 2" | - | disc |
| 70 23 | 20001/2 | Co-Co | 27' 6" | - | 8' 0" | 8' 0" | - | 3' 7" | - | disc with holes |
| 70 23 | 20003 | Co-Co | 28' 6" | - | 8' 0" | 8' 0" | - | 3' 7" | - | disc with holes |
| 70 | 70 001 onward | Co-Co | ? | - | ? | ? | - | 1067mm | - | disc |
| - | E1000 | A1A-A1A | ? | - | 7' 6" | 7' 6" | - | 3' 8" | 3' 8" | disc |
| 71, 74 | E5000-24 17 | Bo-Bo | 27' 0" | 10' 6" | - | - | - | 4' 0" | - | 11-spoke 22 |
| 73 | E6000-49 (JA/JB) | Bo-Bo | 32' 0" | 8' 9" | - | - | - | 3' 4" | - | disc |
| 76 | 26000 (EM1) | Bo-Bo | 23' 6" | 11' 6" | - | - | - | 4' 2" | - | 12-spoke 18 |
| 77 | 27000-6 (EM2) | Co-Co | 30' 2" 19 | - | 8' 0" | 7' 8" | - | 3' 7" | - | ? |
| 81 | E3001-23/96/97 (AL1) | Bo-Bo | 31' 6" | 10' 9" | - | - | - | 4' 0" | - | disc |
| 82 | E3046-55 (AL2) | Bo-Bo | 30' 9" | 10' 0" | - | - | - | 4' 0" | - | disc |
| 83 | E3024-35/98-100 (AL3) | Bo-Bo | 30' 0" | 10' 0" | - | - | - | 4' 0" | - | 12-spoke |
| 84 | E3036-45 (AL4) | Bo-Bo | 29' 6" | 10' 0" | - | - | - | 4' 0" | - | disc |
| 85 | E3056-95 (AL5) | Bo-Bo | 31' 6" | 10' 9" | - | - | - | 4' 0" | - | disc |
| 86 | E3101-200 (AL6) | Bo-Bo | 32' 9" | 10' 9" | - | - | - | 3' 9" 20 | - | disc |
| 87 | - | Bo-Bo | 32' 9" | 10' 9" | - | - | - | 3' 9 ½" | - | disc |
| 89 | - | Co-Co | 10900mm 21 | - | 2100mm | 2300mm | - | 3' 6 ½" | - | disc |
| 90 | - | Bo-Bo | ? | ? | - | - | - | 3' 9 ½" | - | disc |
| 91 | - | Bo-Bo | ? | ? | - | - | - | 3' 3 ½" | - | disc |
| 92 | - | Co-Co | ? | - | ? | ? | - | 1160mm | - | disc |
| 251 | Blue Pullman | Bo-Bo | 46' 6" | 9' 6" 24 | - | - | - | 3' 6" | - | disc |
| Footnotes: | |
| 1 | Ex-NER electric locos. |
| 2 | 35' 2" is the dimension between centre axles. Bogie pivot points were 2" outboard of each centre axle. |
| 3 | Source (for Class 22): Traction magazine, issue 62. The Graham Fenn drawing, indicating 10 spokes, would appear to be incorrect. It is thought that all NBL locos had 11 spokes, so this would include Classes 21, 29 and 41. |
| 4 | 18100 was rebuilt as E1000 with 2 motors removed, making it an A1A-AIA (source: R S Carter). |
| 5 | 3' 3 ½" according to the text of the R S Carter book, but drawing shows 3'3". |
| 6 | 32' 4" between pivot centres – the pivot centre is 1" inboard of the centre axle of the Co bogie. |
| 7 | Marsden & Fenn quotes 12' 2 ½" as the total wheelbase of the Co bogie. The GA in BR Fleet Survey ( Ian Allan) shows 12' 1 ½". |
| 8 | Incorrectly stated as 3' 9" in British Rail Main Line Diesel Locomotives, Colin Marsden and Graham Fenn, OPC, ISBN 0 086093 318 0. (and on the drawing in the book's revision – ISBN ....) |
| 9 | Source R S Carter. Marsden & Fenn quote 34'4" as the bogie pivot centres. Dimension between centre axles is likely to be very close to this. |
| 10 | Originally fitted with spoked wheels, probably 11-spoke as per Class 22, on all axles. Fitted later with disc wheels. |
| 11 | Kestrel was later fitted with standard class 47 bogies. |
| 12 | 37' 8" is the dimension between bogie pivot centres. Centre axle to centre axle dimension, a, is approximately 35'. |
| 13 | 10800mm is the dimension between centre axles. The "traction centre" is 545mm outboard of each centre axle. |
| 14 | Scales at approx 3' 9" on the Graham Fenn drawing in the original edition of the Marsden & Fenn book. |
| 15 | 3' 6" according to revised Marsden & Fenn book. |
| 16 | Information taken from manufacturer's data, which is given in both metric and imperial values. The drawing in the Marsden & Fenn book would appear to be incorrect on both bogie wheelbase and overall wheelbase. |
| 17 | E5000-24 became class 71. Ten were rebuilt as electro-diesel E6101-10, then 74001-10. |
| 18 | Source R S Carter. |
| 19 | 30' 2" between bogie centre axles. Bogie pivots are 2" outboard of each centre axle. |
| 20 | Probably 3' 9" for majority of class. R S Carter states 3'9 ½". |
| 21 | 10900mm between bogie centre axles. Bogie pivots are 75mm inboard of each centre axle. |
| 22 | Estimated from photos. |
| 23 | As originally classified. |
| 24 | For all leading and drive bogies. All non-driving bogie wheelbases are 8' 6" (also with 3' 6" wheels). |
DMUs and DEMUs
| TOPS class (or pre-TOPS description) | Bogie centres, a | Bogie wheelbase, b | Wheel diameter, d |
| Derby Lightweight, Metro Cammell (original), 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 112, 113, 129 | 40' 0" | 8' 6" | 3' 0" |
| 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127, 128 | 46' 6" | 8' 6" | 3' 0" |
| 201 | 40' 0" | 8' 9" (drive bogie) 8' 6" (non-driving bogie) |
3' 4" 1 |
| 202, 203, 204, 205, 206, 207 | 46' 6" | 8' 9" (drive bogie) 8' 6" (non-driving bogie) |
3' 4" 1 |
| 1 Wheel diameter on non-driving bogies was 3' 6" | |||
EMUs
(to follow)
4-wheel railbuses *All wheels are 3' 0" diameter * These are not bogie vehicles, but are included on this page for the sake of completeness |
|
History:
- First published July 2000
- Class 67 information corrected January 2002
- deletion of broken external link (for class 67) September 2005
- correction of number (11) of spokes for Class 22 wheels, June 2006
- correction of number (11) of spokes for Class 21/29 wheels, October 2006
- clarification of number of spokes for Class 41, March 2008
- clarification of number of spokes on Class 71, July 2008
- new class 70 added 9 September 2010
- 1st gen DMU information started 23 February 2011
- DEMU wheel diameter clarified 24 February 2011
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