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Philadelphia & Reading No. 385 and 378
Superintendent L.B. Paxson of the Philadelphia & Reading was convinced in the mid-1890s that an express locomotive with one powered axle would still be sufficient to haul express trains at high speed. He was thinking ...
| Philadelphia & Reading No. 385 and 378Remove | |
|---|---|
| Variant | as built |
| Built | 1895-1896 |
| Manufacturers | Baldwin |
| Wheel arrangement | 2A1 |
| Gauge | 1435 mm |
| Length | |
| Service mass | 52163 kg |
| Top speed | |
| Power | |
| Engine |
General
| Property | Philadelphia & Reading No. 385 and 378as built |
|---|---|
| Built | 1895-1896 |
| Manufacturers | Baldwin |
| Wheel arrangement | 4-2-2 (Single) |
| Gauge | 1,435 mm |
Dimensions and weights
| Property | Philadelphia & Reading No. 385 and 378as built |
|---|---|
| Wheelbase | 6.93 m |
| Service mass | 52.2 t |
| Adhesion mass | 21.8 t |
| Total mass | 90.3 t |
| Axle load | 21.8 t |
| Water capacity | 15,142 l |
| Fuel capacity | 6.4 t (coal) |
Boiler
| Property | Philadelphia & Reading No. 385 and 378as built |
|---|---|
| Grate area | 7.061 m² |
| Firebox surface | 16.072 m² |
| Tube heating surface | 120.124 m² |
| Evaporative heating surface | 136.196 m² |
| Total heating surface | 136.2 m² |
Power plant
| Property | Philadelphia & Reading No. 385 and 378as built |
|---|---|
| Driver diameter | 2,140 mm |
| Boiler pressure | 13.8 bar |
| Expansion type | compound |
| Cylinders | four, HP: 330 x 660 mm and LP: 559 x 660 mm |
Power
| Property | Philadelphia & Reading No. 385 and 378as built |
|---|---|
| Power source | steam |
| Estimated power | 1,063 kW (1,445 PS) |
| Starting effort | 58.5 kN |
| Starting effort simple | 70.2 kN |
Calculated values
| Property | Philadelphia & Reading No. 385 and 378as built |
|---|---|
| Factor of adhesion | 1 : 3.65 |
| Optimal speed | 111 km/h |
| Power-to-weight ratio | 20.4 kW/t |
| Heating Surface Equivalent | 216.6 m² |
| Cylinder volume/HSE | 1 : 1,270.18 |
| Adhesive weight/Total | 1 : 2.40 |
| Tractive force/Heating surface | 1 : 8.97 |
| Grate area/Heating surface | 1 : 19.29 |
| Firebox/Tube surface | 1 : 7.47 |
