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Great Northern (IE) class PP
The class PP was a 4-4-0 introduced in 1896 by Charles Clifford, originally designed for mail trains between Dublin and Belfast. At this time, they were the heaviest and most powerful locomotives in Ireland. Compared ...
| Great Northern (IE) class PPRemove | |
|---|---|
| Variant | 1896 batch |
| Built | 1896-1898 |
| Manufacturers | Beyer, Peacock & Co.;Dundalk |
| Wheel arrangement | 2B |
| Gauge | 1600 mm |
| Length | |
| Service mass | 42674 kg |
| Top speed | |
| Power | |
| Engine |
General
| Property | Great Northern (IE) class PP1896 batch |
|---|---|
| Built | 1896-1898 |
| Manufacturers | Beyer, Peacock & Co., Dundalk |
| Wheel arrangement | 4-4-0 (American) |
| Gauge | 1,600 mm |
Dimensions and weights
| Property | Great Northern (IE) class PP1896 batch |
|---|---|
| Wheelbase | 6.21 m |
| Total wheelbase | 12.43 m |
| Service mass | 42.7 t |
| Adhesion mass | 29.2 t |
| Axle load | 16 t |
Boiler
| Property | Great Northern (IE) class PP1896 batch |
|---|---|
| Grate area | 1.695 m² |
| Firebox surface | 10.126 m² |
| Tube heating surface | 94.111 m² |
| Evaporative heating surface | 104.237 m² |
| Total heating surface | 104.2 m² |
Power plant
| Property | Great Northern (IE) class PP1896 batch |
|---|---|
| Driver diameter | 2,007 mm |
| Boiler pressure | 11 bar |
| Expansion type | simple expansion |
| Cylinders | two, 457 x 610 mm |
Power
| Property | Great Northern (IE) class PP1896 batch |
|---|---|
| Power source | steam |
| Estimated power | 391 kW (532 PS) |
| Starting effort | 59.5 kN |
Calculated values
| Property | Great Northern (IE) class PP1896 batch |
|---|---|
| Factor of adhesion | 1 : 4.81 |
| Optimal speed | 40 km/h |
| Power-to-weight ratio | 9.2 kW/t |
| Heating Surface Equivalent | 154.9 m² |
| Cylinder volume/HSE | 1 : 1,292.46 |
| Adhesive weight/Total | 1 : 1.46 |
| Tractive force/Heating surface | 1 : 11.93 |
| Grate area/Heating surface | 1 : 61.50 |
| Firebox/Tube surface | 1 : 9.29 |
