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Record: 71951 (21/04/2026)
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NBR/LNER Holmes "D26" Class 4-4-0
General
| Designer |
Matthew Holmes |
| Introduced |
1903 |
| Pre-Grouping Company |
North British Railway |
| Grouping Company |
London and North Eastern Railway |
| Wheel Arrangement |
4-4-0 |
| Number Built as D26 |
12 |
| Number Scrapped |
12 |
| Number Preserved |
0 |
| First in Service |
05/1903 |
| Last in Service |
07/1926 |
| Manufacturers |
|
| Orders |
|
| Historical Data |
All engines were fitted with steam heating apparatus - 325-8 were fitted with the Midland type for use on trains over the Waverley route. 318/20/2/4/7 were fitted with tablet catchers for use on the Dundee-Aberdeen main line. |
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Power
| Variant Introduced |
1903 |
| Tractive Effort |
19,434lbs |
| Inside Cylinders |
19" x 26" (2 off) |
| Inside Valves |
8.75"Piston |
| Inside Motion |
Stephenson |
Wheels
| Pony |
3' 6" |
| Drivers |
6' 6" |
| Locomotive Wheelbase |
23' 7" |
| Tender Wheelbase |
13' 2" |
| Total Wheelbase |
46' 81⁄2" |
| Descriptive Wheelbase |
6' 6" + 7' 7" + 9' 6" + 9' 7½" + 6' 9" + 6' 9" = 46' 8½" |
Dimensions
| Length (over buffers) |
56' 3" |
| Weight (in running order) |
92t 0cwt |
| Weight (loco only) |
52t 0cwt |
| Adhesive Weight |
35t 0cwt |
| Maximum Axle Load |
18t 6cwt |
Boiler & Firebox
| Boiler Max Diameter |
4' 81⁄8" |
| Boiler Barrel Length |
11' 4" |
| Boiler Pressure |
190lbs |
| Boiler Pitch |
7' 9" |
| Firebox Type |
Round Top |
| Firebox Length |
6' 81⁄2" |
| Firebox Grate Area |
22.5ft2 |
| Firebox Heating Surface |
133ft2 |
| Tube Number |
254 |
| Tube Diameter |
17⁄8" |
| Tube Area |
1444ft2 |
| Total Evaporative Area |
1577ft2 |
| Total Heating Area |
1577ft2 |
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