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North British class J “Scott”
Based on the class K for mixed traffic, Reid commissioned the class J for express service. Like the first batch of the class K, the J had a wheel diameter of six feet six inches. The dimensions of the cylinders were a...
| North British class J “Scott”Remove | |
|---|---|
| Variant | |
| Built | 1912 |
| Manufacturers | North British;Cowlairs |
| Wheel arrangement | 2B |
| Gauge | 1435 mm |
| Length | |
| Service mass | 58207 kg |
| Top speed | |
| Power | |
| Engine |
General
| Property | North British class J “Scott”Remove |
|---|---|
| Built | 1912 |
| Manufacturers | North British, Cowlairs |
| Wheel arrangement | 4-4-0 (American) |
| Gauge | 1,435 mm |
Dimensions and weights
| Property | North British class J “Scott”Remove |
|---|---|
| Wheelbase | 7.19 m |
| Total wheelbase | 14.24 m |
| Service mass | 58.2 t |
| Adhesion mass | 38.5 t |
| Total mass | 104.9 t |
| Rigid wheelbase | 2.90 m |
| Axle load | 20 t |
| Water capacity | 16,012 l |
| Fuel capacity | 7 t (coal) |
Boiler
| Property | North British class J “Scott”Remove |
|---|---|
| Grate area | 1.963 m² |
| Firebox surface | 12.979 m² |
| Tube heating surface | 108.409 m² |
| Evaporative heating surface | 121.387 m² |
| Superheater surface | 24.749 m² |
| Total heating surface | 146.1 m² |
Power plant
| Property | North British class J “Scott”Remove |
|---|---|
| Driver diameter | 1,981 mm |
| Boiler pressure | 11.7 bar |
| Expansion type | simple expansion |
| Cylinders | two, 508 x 660 mm |
Power
| Property | North British class J “Scott”Remove |
|---|---|
| Power source | steam |
| Estimated power | 746 kW (1,014 PS) |
| Starting effort | 85.7 kN |
Calculated values
| Property | North British class J “Scott”Remove |
|---|---|
| Factor of adhesion | 1 : 4.40 |
| Optimal speed | 53 km/h |
| Power-to-weight ratio | 12.8 kW/t |
| Heating Surface Equivalent | 235.8 m² |
| Cylinder volume/HSE | 1 : 1,135.39 |
| Adhesive weight/Total | 1 : 1.51 |
| Tractive force/Heating surface | 1 : 12.25 |
| Grate area/Heating surface | 1 : 74.45 |
| Firebox/Tube surface | 1 : 8.35 |
| Total/Superheater | 1 : 4.90 |
