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Wyllam Colliery “Puffing Billy”, “Wylam Dilly” and “Lady Mary”
The “Puffing Billy” and her two sisters can be described as the first which locomotives that were in commercial service for several years. Richard Trevithick's “Pen-y-Darren” was the first working steam engine, but af...
General
| Property | Wyllam Colliery “Puffing Billy”, “Wylam Dilly” and “Lady Mary”Remove |
|---|---|
| Built | 1813-1815 |
| Manufacturers | William Hadley & Timothy Hackworth |
| Wheel arrangement | 0-4-0 (Four-coupled) |
| Gauge | 1,519 mm |
Dimensions and weights
| Property | Wyllam Colliery “Puffing Billy”, “Wylam Dilly” and “Lady Mary”Remove |
|---|---|
| Length | 6.79 m |
| Wheelbase | 1.91 m |
| Rigid wheelbase | 1.91 m |
| Service weight | 9.2 t |
| Adhesive weight | 9.2 t |
| Total weight | 13.3 t |
Boiler
| Property | Wyllam Colliery “Puffing Billy”, “Wylam Dilly” and “Lady Mary”Remove |
|---|---|
| Grate area | 0.465 m² |
| Evaporative heating surface | 8.083 m² |
| Total heating surface | 8.1 m² |
Power plant
| Property | Wyllam Colliery “Puffing Billy”, “Wylam Dilly” and “Lady Mary”Remove |
|---|---|
| Driver diameter | 991 mm |
| Boiler pressure | 3.4 bar |
| Expansion type | simple expansion |
| Cylinders | two, 229 x 914 mm |
Power
| Property | Wyllam Colliery “Puffing Billy”, “Wylam Dilly” and “Lady Mary”Remove |
|---|---|
| Power source | steam |
| Estimated power | 7 kW (10 PS) |
| Top speed | 8 km/h |
| Starting effort | 14.1 kN |
Calculated values
| Property | Wyllam Colliery “Puffing Billy”, “Wylam Dilly” and “Lady Mary”Remove |
|---|---|
| Factor of adhesion | 1 : 6.38 |
| Optimal speed | 3 km/h |
| Power-to-weight ratio | 0.8 kW/t |
| Adhesive weight/Total | 1 : 1.00 |
| Tractive force/Heating surface | 1 : 36.53 |
| Grate area/Heating surface | 1 : 17.38 |
