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Philadelphia & Reading class Q-1
The class Q-1 was a 2-6-4T tank locomotive designed for commuter traffic between Reading Terminal in Philadelphia and Chestnut Hill. It had needed three sets of drivers for heavy grades, but also had to be flexible fo...
General
| Property | Philadelphia & Reading class Q-1 Q-1a |
|---|---|
| Built | 1903 |
| Manufacturers | Baldwin |
| Wheel arrangement | 2-6-4T (Adriatic) |
| Gauge | 1,435 mm (Standard gauge) |
Dimensions and weights
| Property | Philadelphia & Reading class Q-1 Q-1a |
|---|---|
| Length | 12.37 m |
| Wheelbase | 9.37 m |
| Rigid wheelbase | 3.81 m |
| Service weight | 91.5 t |
| Adhesive weight | 54.8 t |
| Water capacity | 11,356 l |
| Fuel capacity | 3.4 t (coal) |
Boiler
| Property | Philadelphia & Reading class Q-1 Q-1a |
|---|---|
| Grate area | 6.368 m² |
| Firebox surface | 14.511 m² |
| Tube heating surface | 169.623 m² |
| Evaporative heating surface | 184.134 m² |
| Total heating surface | 184.1 m² |
Power plant
| Property | Philadelphia & Reading class Q-1 Q-1a |
|---|---|
| Driver diameter | 1,562 mm |
| Boiler pressure | 13.8 bar |
| Expansion type | simple expansion |
| Cylinders | two, 508 x 610 mm |
Power
| Property | Philadelphia & Reading class Q-1 Q-1a |
|---|---|
| Power source | steam |
| Estimated power | 1,044 kW (1,419 PS) |
| Starting effort | 118.0 kN |
Calculated values
| Property | Philadelphia & Reading class Q-1 Q-1a |
|---|---|
| Factor of adhesion | 1 : 4.56 |
| Optimal speed | 55 km/h |
| Power-to-weight ratio | 11.4 kW/t |
| Heating Surface Equivalent | 256.7 m² |
| Cylinder volume/HSE | 1 : 962.69 |
| Adhesive weight/Total | 1 : 1.67 |
| Tractive force/Heating surface | 1 : 13.39 |
| Grate area/Heating surface | 1 : 28.92 |
| Firebox/Tube surface | 1 : 11.69 |
