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Gotthard Railway A 3/5 No. 931 to 938
After the first type A 3/5 express locomotives, the Gotthardbahn had Maffei develop another variant of this type in 1908. Although it was primarily intended for use on the company's valley lines, it was also intended ...
General
| Property | Gotthard Railway A 3/5 No. 931 to 938Remove |
|---|---|
| Built | 1908 |
| Manufacturers | Maffei, SLM |
| Wheel arrangement | 4-6-0 (Ten-wheeler) |
| Gauge | 1,435 mm (Standard gauge) |
Dimensions and weights
| Property | Gotthard Railway A 3/5 No. 931 to 938Remove |
|---|---|
| Length | 17.46 m |
| Length loco | 11.69 m |
| Wheelbase | 8.64 m |
| Rigid wheelbase | 3.90 m |
| Empty weight | 70.4 t |
| Service weight | 79.8 t |
| Adhesive weight | 49.5 t |
| Axle load | 16.5 t |
| Total weight | 117.8 t |
| Water capacity | 17,000 l |
| Fuel capacity | 5 t (coal) |
Boiler
| Property | Gotthard Railway A 3/5 No. 931 to 938Remove |
|---|---|
| Grate area | 3.34 m² |
| Firebox surface | 15.4 m² |
| Tube heating surface | 173.2 m² |
| Evaporative heating surface | 188.6 m² |
| Superheater surface | 50.84 m² |
| Total heating surface | 239.4 m² |
Power plant
| Property | Gotthard Railway A 3/5 No. 931 to 938Remove |
|---|---|
| Driver diameter | 1,610 mm |
| Boiler pressure | 15 bar |
| Expansion type | compound |
| Cylinders | four, HP: 395 x 640 mm and LP: 635 x 640 mm |
Power
| Property | Gotthard Railway A 3/5 No. 931 to 938Remove |
|---|---|
| Power source | steam |
| Indicated power | 1,221 kW (1,660 PS) |
| Top speed | 90 km/h |
| Starting effort | 114.0 kN |
| Starting effort simple | 136.8 kN |
Calculated values
| Property | Gotthard Railway A 3/5 No. 931 to 938Remove |
|---|---|
| Factor of adhesion | 1 : 4.26 |
| Optimal speed | 66 km/h |
| Power-to-weight ratio | 15.3 kW/t |
| Heating Surface Equivalent | 367.3 m² |
| Cylinder volume/HSE | 1 : 978.92 |
| Adhesive weight/Total | 1 : 1.61 |
| Tractive force/Heating surface | 1 : 9.95 |
| Grate area/Heating surface | 1 : 71.69 |
| Firebox/Tube surface | 1 : 11.25 |
| Total/Superheater | 1 : 3.71 |
