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Italian State Railway classes 470 and 471
One of the first locomotive types designed after the founding of the FS was a heavy freight locomotive for mountain lines. To get maximum traction, it was designed with five axles, all of which were coupled. The locom...
| Italian State Railway classes 470 and 471Remove | |
|---|---|
| Variant | |
| Built | 1907-1911 |
| Manufacturers | Maffei;Officine Meccaniche;Breda;OM Napoli |
| Wheel arrangement | E |
| Gauge | 1435 mm |
| Length | 20565 mm |
| Service mass | 74800 kg |
| Top speed | 50 km/h |
| Power | |
| Engine |
General
| Property | Italian State Railway classes 470 and 471Remove |
|---|---|
| Built | 1907-1911 |
| Manufacturers | Maffei, Officine Meccaniche, Breda, OM Napoli |
| Wheel arrangement | 0-10-0 (Ten-coupled) |
| Gauge | 1,435 mm |
Dimensions and weights
| Property | Italian State Railway classes 470 and 471Remove |
|---|---|
| Length | 20.57 m |
| Wheelbase | 6.00 m |
| Total wheelbase | 15.24 m |
| Empty mass | 64 t |
| Service mass | 74.8 t |
| Adhesion mass | 74.8 t |
| Total mass | 102.4 t |
| Rigid wheelbase | 3.00 m |
| Axle load | 15.1 t |
| Water capacity | 13,000 l |
| Fuel capacity | 4 t (coal) |
Boiler
| Property | Italian State Railway classes 470 and 471Remove |
|---|---|
| Grate area | 3.5 m² |
| Firebox surface | 12 m² |
| Tube heating surface | 207.5 m² |
| Evaporative heating surface | 219.5 m² |
| Total heating surface | 219.5 m² |
Power plant
| Property | Italian State Railway classes 470 and 471Remove |
|---|---|
| Driver diameter | 1,370 mm |
| Boiler pressure | 16 bar |
| Expansion type | compound |
| Cylinders | four, HP: 375 x 610 mm and LP: 610 x 610 mm |
Power
| Property | Italian State Railway classes 470 and 471Remove |
|---|---|
| Power source | steam |
| Estimated power | 850 kW (1,156 PS) |
| Top speed | 50 km/h |
| Starting effort | 123.6 kN |
| Starting effort simple | 148.3 kN |
Calculated values
| Property | Italian State Railway classes 470 and 471Remove |
|---|---|
| Factor of adhesion | 1 : 5.94 |
| Optimal speed | 42 km/h |
| Power-to-weight ratio | 11.4 kW/t |
| Heating Surface Equivalent | 279.5 m² |
| Cylinder volume/HSE | 1 : 1,119.91 |
| Adhesive weight/Total | 1 : 1.00 |
| Tractive force/Heating surface | 1 : 11.76 |
| Grate area/Heating surface | 1 : 62.71 |
| Firebox/Tube surface | 1 : 17.29 |
