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Pennsylvania class I1s
To maximize the pulling power of ten-coupled freight locomotives, the PRR made use of its high permitted axle load and returned to the 2-10-0 wheel arrangement in 1916. The lack of a trailing axle did not allow for la...
General
| Property | Pennsylvania class I1s Remove |
|---|---|
| Built | 1916, 1918-1919 |
| Manufacturers | Altoona |
| Wheel arrangement | 2-10-0 (Decapod) |
| Gauge | 1,435 mm (Standard gauge) |
Dimensions and weights
| Property | Pennsylvania class I1s Remove |
|---|---|
| Wheelbase | 9.80 m |
| Rigid wheelbase | 6.91 m |
| Total wheelbase | 22.26 m |
| Service weight | 166.2 t |
| Adhesive weight | 151.7 t |
| Axle load | 31.3 t |
| Total weight | 248.8 t |
| Water capacity | 34,069 l |
| Fuel capacity | 15.9 t (coal) |
Boiler
| Property | Pennsylvania class I1s Remove |
|---|---|
| Grate area | 6.503 m² |
| Firebox surface | 25.27 m² |
| Tube heating surface | 375.7 m² |
| Evaporative heating surface | 400.97 m² |
| Superheater surface | 126.348 m² |
| Total heating surface | 527.3 m² |
Power plant
| Property | Pennsylvania class I1s Remove |
|---|---|
| Driver diameter | 1,575 mm |
| Boiler pressure | 17.2 bar |
| Expansion type | simple expansion |
| Cylinders | two, 775 x 813 mm |
Power
| Property | Pennsylvania class I1s Remove |
|---|---|
| Power source | steam |
| Indicated power | 2,297 kW (3,123 PS) |
| Starting effort | 427.0 kN |
Calculated values
| Property | Pennsylvania class I1s Remove |
|---|---|
| Factor of adhesion | 1 : 3.49 |
| Optimal speed | 31 km/h |
| Power-to-weight ratio | 13.8 kW/t |
| Heating Surface Equivalent | 780.0 m² |
| Cylinder volume/HSE | 1 : 982.35 |
| Adhesive weight/Total | 1 : 1.10 |
| Tractive force/Heating surface | 1 : 16.91 |
| Grate area/Heating surface | 1 : 81.09 |
| Firebox/Tube surface | 1 : 14.87 |
| Total/Superheater | 1 : 3.17 |
