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Record: 71951 (21/04/2026)
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HR/LMS Cumming "4P" Class 4-6-0
Class Types
| HR Class |
Highland Clan |
General
| Designer |
Christopher Cumming |
| Introduced |
1919 |
| Pre-Grouping Company |
Highland Railway |
| Grouping Company |
London, Midland & Scottish Railway |
| Wheel Arrangement |
4-6-0 |
| Number Built as 4P |
8 |
| Number Scrapped |
8 |
| First in Service |
04/1919 |
| Last in Service |
02/1950 |
| Manufacturers |
|
| Orders |
|
|
|
|
Power
| Variant Introduced |
1919 |
| Tractive Effort |
23,688lbs |
| Outside Cylinders |
21" x 26" (2 off) |
Wheels
| Pony |
3' |
| Drivers |
6' |
| Locomotive Wheelbase |
25' 9" |
| Tender Wheelbase |
13' |
| Total Wheelbase |
50' |
| Descriptive Wheelbase |
6' 7" + 5' 2" + 6' 9" + 7' 3" + 11' 3" + 6' 6" + 6' 6" = 50' 0" |
Dimensions
| Length (over buffers) |
59' 11" |
| Weight (in running order) |
104t 6cwt |
| Weight (loco only) |
62t 4cwt |
| Adhesive Weight |
45t 10cwt |
| Water Capacity |
3,500gal |
| Coal Capacity |
7t 0cwt |
Boiler & Firebox
| Boiler Diagram |
?? |
| Boiler Max Diameter |
4' 913⁄16" |
| Boiler Barrel Length |
14' 6" |
| Boiler Pressure |
175lbs |
| Boiler Pitch |
8' 9" |
| Firebox Type |
Belpaire |
| Firebox Length |
8' |
| Firebox Grate Area |
25.5ft2 |
| Firebox Heating Surface |
139ft2 |
| Tube Number |
118 |
| Tube Diameter |
2" |
| Tube Area |
919ft2 |
| Flue Elements |
21 |
| Flue Diameter |
5" |
| Flue Area |
409ft2 |
| Total Evaporative Area |
1467ft2 |
| Superheater Element Area |
256ft2 |
|
