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Pennsylvania class AAn
In order to be able to burn anthracite coal efficiently, class AAn was developed from class K (later D6). The K already had a wide firebox above the drivers, which was optimized here for the use of anthracite . There ...
| Pennsylvania class AAnRemove | |
|---|---|
| Variant | |
| Built | 1882-1891 |
| Manufacturers | Altoona |
| Wheel arrangement | 2B |
| Gauge | 1435 mm |
| Length | 17693 mm |
| Service mass | 42343 kg |
| Top speed | |
| Power | |
| Engine |
General
| Property | Pennsylvania class AAnRemove |
|---|---|
| Built | 1882-1891 |
| Manufacturers | Altoona |
| Wheel arrangement | 4-4-0 (American) |
| Gauge | 1,435 mm |
Dimensions and weights
| Property | Pennsylvania class AAnRemove |
|---|---|
| Length | 17.69 m |
| Wheelbase | 6.91 m |
| Total wheelbase | 14.78 m |
| Service mass | 42.3 t |
| Adhesion mass | 29 t |
| Total mass | 69.6 t |
| Rigid wheelbase | 2.36 m |
| Axle load | 15 t |
| Water capacity | 9,085 l |
| Fuel capacity | 5.4 t (coal) |
Boiler
| Property | Pennsylvania class AAnRemove |
|---|---|
| Grate area | 3.233 m² |
| Firebox surface | 14.4 m² |
| Tube heating surface | 105.352 m² |
| Evaporative heating surface | 119.752 m² |
| Total heating surface | 119.8 m² |
Power plant
| Property | Pennsylvania class AAnRemove |
|---|---|
| Driver diameter | 1,727 mm |
| Boiler pressure | 9.7 bar |
| Expansion type | simple expansion |
| Cylinders | two, 432 x 610 mm |
Power
| Property | Pennsylvania class AAnRemove |
|---|---|
| Power source | steam |
| Estimated power | 522 kW (710 PS) |
| Starting effort | 54.0 kN |
Calculated values
| Property | Pennsylvania class AAnRemove |
|---|---|
| Factor of adhesion | 1 : 5.27 |
| Optimal speed | 60 km/h |
| Power-to-weight ratio | 12.3 kW/t |
| Heating Surface Equivalent | 191.8 m² |
| Cylinder volume/HSE | 1 : 931.09 |
| Adhesive weight/Total | 1 : 1.46 |
| Tractive force/Heating surface | 1 : 9.42 |
| Grate area/Heating surface | 1 : 37.04 |
| Firebox/Tube surface | 1 : 7.32 |
