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Pennsylvania class T1
After the S1 built at the Altoona Works proved too large and of little practical use, Baldwin built the first two prototypes of the T1 for the PRR during World War II. The reason for purchasing such large express loco...
General
| Property | Pennsylvania class T1Remove |
|---|---|
| Built | 1942, 1946 |
| Manufacturers | Altoona, Baldwin |
| Wheel arrangement | 4-4-4-4 (Duplex) |
| Gauge | 1,435 mm (Standard gauge) |
Dimensions and weights
| Property | Pennsylvania class T1Remove |
|---|---|
| Length | 37.43 m |
| Wheelbase | 15.82 m |
| Rigid wheelbase | 4.22 m |
| Total wheelbase | 32.61 m |
| Service weight | 227.8 t |
| Adhesive weight | 127 t |
| Axle load | 32.5 t |
| Total weight | 428.5 t |
| Water capacity | 72,680 l |
| Fuel capacity | 38.6 t (coal) |
Boiler
| Property | Pennsylvania class T1Remove |
|---|---|
| Grate area | 8.547 m² |
| Firebox surface | 45.523 m² |
| Tube heating surface | 391.029 m² |
| Evaporative heating surface | 436.552 m² |
| Superheater surface | 132.851 m² |
| Total heating surface | 569.4 m² |
Power plant
| Property | Pennsylvania class T1Remove |
|---|---|
| Driver diameter | 2,032 mm |
| Boiler pressure | 20.7 bar |
| Expansion type | simple expansion |
| Cylinders | four, 502 x 660 mm |
Power
| Property | Pennsylvania class T1Remove |
|---|---|
| Power source | steam |
| Indicated power | 4,847 kW (6,590 PS) |
| Top speed | 177 km/h |
| Starting effort | 287.6 kN |
Calculated values
| Property | Pennsylvania class T1Remove |
|---|---|
| Factor of adhesion | 1 : 4.33 |
| Optimal speed | 103 km/h |
| Power-to-weight ratio | 21.3 kW/t |
| Heating Surface Equivalent | 929.9 m² |
| Cylinder volume/HSE | 1 : 561.48 |
| Adhesive weight/Total | 1 : 1.79 |
| Tractive force/Heating surface | 1 : 10.55 |
| Grate area/Heating surface | 1 : 66.62 |
| Firebox/Tube surface | 1 : 8.59 |
| Total/Superheater | 1 : 3.29 |
