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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 Baldwin - 1929 variant |
|---|---|
| Built | 1929 |
| Manufacturers | Baldwin |
| Wheel arrangement | 2-10-0 (Decapod) |
| Gauge | 1,435 mm (Standard gauge) |
Dimensions and weights
| Property | Pennsylvania class I1s Baldwin - 1929 variant |
|---|---|
| Wheelbase | 9.80 m |
| Rigid wheelbase | 6.91 m |
| Total wheelbase | 22.37 m |
| Service weight | 175.1 t |
| Adhesive weight | 159.9 t |
| Axle load | 32.9 t |
| Total weight | 268 t |
| Water capacity | 38,990 l |
| Fuel capacity | 17 t (coal) |
Boiler
| Property | Pennsylvania class I1s Baldwin - 1929 variant |
|---|---|
| Grate area | 6.503 m² |
| Firebox surface | 29.915 m² |
| Tube heating surface | 396.511 m² |
| Evaporative heating surface | 426.426 m² |
| Superheater surface | 151.804 m² |
| Total heating surface | 578.2 m² |
Power plant
| Property | Pennsylvania class I1s Baldwin - 1929 variant |
|---|---|
| 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 Baldwin - 1929 variant |
|---|---|
| Power source | steam |
| Estimated power | 2,438 kW (3,315 PS) |
| Starting effort | 427.0 kN |
Calculated values
| Property | Pennsylvania class I1s Baldwin - 1929 variant |
|---|---|
| Factor of adhesion | 1 : 3.67 |
| Optimal speed | 32 km/h |
| Power-to-weight ratio | 13.9 kW/t |
| Heating Surface Equivalent | 879.6 m² |
| Cylinder volume/HSE | 1 : 871.13 |
| Adhesive weight/Total | 1 : 1.10 |
| Tractive force/Heating surface | 1 : 15.42 |
| Grate area/Heating surface | 1 : 88.92 |
| Firebox/Tube surface | 1 : 13.25 |
| Total/Superheater | 1 : 2.81 |
