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Record: 10235 (26/09/2023)
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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 |
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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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