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Lancashire & Yorkshire Hughes 4-6-4T “Dreadnought Tanks”
Based on the class 8 “Dreadnought”, George Hughes developed a tank locomotive that was also intended for express service. Thanks to the trailing bogie , it now had a 4-6-4T wheel arrangement. The boiler with Belpaire ...
General
| Property | Lancashire & Yorkshire Hughes 4-6-4T “Dreadnought Tanks”Remove |
|---|---|
| Built | 1924 |
| Manufacturers | Horwich |
| Wheel arrangement | 4-6-4T (Hudson) |
| Gauge | 1,435 mm (Standard gauge) |
Dimensions and weights
| Property | Lancashire & Yorkshire Hughes 4-6-4T “Dreadnought Tanks”Remove |
|---|---|
| Length | 15.20 m |
| Wheelbase | 12.29 m |
| Rigid wheelbase | 4.14 m |
| Service weight | 101.6 t |
| Adhesive weight | 56.9 t |
| Axle load | 19 t |
| Water capacity | 9,093 l |
| Fuel capacity | 4.1 t (coal) |
Boiler
| Property | Lancashire & Yorkshire Hughes 4-6-4T “Dreadnought Tanks”Remove |
|---|---|
| Grate area | 2.75 m² |
| Firebox surface | 16.723 m² |
| Tube heating surface | 168.805 m² |
| Evaporative heating surface | 185.528 m² |
| Superheater surface | 31.866 m² |
| Total heating surface | 217.4 m² |
Power plant
| Property | Lancashire & Yorkshire Hughes 4-6-4T “Dreadnought Tanks”Remove |
|---|---|
| Driver diameter | 1,905 mm |
| Boiler pressure | 12.4 bar |
| Expansion type | simple expansion |
| Cylinders | four, 419 x 660 mm |
Power
| Property | Lancashire & Yorkshire Hughes 4-6-4T “Dreadnought Tanks”Remove |
|---|---|
| Power source | steam |
| Estimated power | 1,081 kW (1,470 PS) |
| Starting effort | 128.5 kN |
Calculated values
| Property | Lancashire & Yorkshire Hughes 4-6-4T “Dreadnought Tanks”Remove |
|---|---|
| Factor of adhesion | 1 : 4.35 |
| Optimal speed | 51 km/h |
| Power-to-weight ratio | 10.6 kW/t |
| Heating Surface Equivalent | 332.9 m² |
| Cylinder volume/HSE | 1 : 1,094.74 |
| Adhesive weight/Total | 1 : 1.78 |
| Tractive force/Heating surface | 1 : 12.34 |
| Grate area/Heating surface | 1 : 79.05 |
| Firebox/Tube surface | 1 : 10.09 |
| Total/Superheater | 1 : 5.82 |
