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Pennsylvania class A5s
The PRR had lots of tracks on streets and on industrial property with tight curves, where even locomotives with three sets of drivers had problems. So they were probably the last US railroad to design a huge standard ...
General
| Property | Pennsylvania class A5sRemove |
|---|---|
| Built | 1916-1924 |
| Manufacturers | Altoona |
| Wheel arrangement | 0-4-0 (Four-coupled) |
| Gauge | 1,435 mm (Standard gauge) |
Dimensions and weights
| Property | Pennsylvania class A5sRemove |
|---|---|
| Wheelbase | 2.21 m |
| Rigid wheelbase | 2.21 m |
| Total wheelbase | 13.32 m |
| Empty weight | 54.8 t |
| Service weight | 59.8 t |
| Adhesive weight | 59.8 t |
| Axle load | 30.4 t |
| Water capacity | 20,820 l |
| Fuel capacity | 5.4 t (coal) |
Boiler
| Property | Pennsylvania class A5sRemove |
|---|---|
| Grate area | 3.561 m² |
| Firebox surface | 12.077 m² |
| Tube heating surface | 80.175 m² |
| Evaporative heating surface | 92.253 m² |
| Superheater surface | 30.379 m² |
| Total heating surface | 122.6 m² |
Power plant
| Property | Pennsylvania class A5sRemove |
|---|---|
| Driver diameter | 1,270 mm |
| Boiler pressure | 12.8 bar |
| Expansion type | simple expansion |
| Cylinders | two, 508 x 610 mm |
Power
| Property | Pennsylvania class A5sRemove |
|---|---|
| Power source | steam |
| Estimated power | 671 kW (912 PS) |
| Starting effort | 134.3 kN |
Calculated values
| Property | Pennsylvania class A5sRemove |
|---|---|
| Factor of adhesion | 1 : 4.37 |
| Optimal speed | 31 km/h |
| Power-to-weight ratio | 11.2 kW/t |
| Heating Surface Equivalent | 213.4 m² |
| Cylinder volume/HSE | 1 : 1,158.00 |
| Adhesive weight/Total | 1 : 1.00 |
| Tractive force/Heating surface | 1 : 22.87 |
| Grate area/Heating surface | 1 : 34.44 |
| Firebox/Tube surface | 1 : 6.64 |
| Total/Superheater | 1 : 3.04 |
