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Italian State Railway class 740
The Grupo 740 of the Italian State Railway was a freight locomotive with a 2-8-0 wheel arrangement, which achieved the highest number of all steam locomotives on this railway. It was based on the Grupo 730, but unlike...
| Italian State Railway class 740Remove | |
|---|---|
| Variant | three-axle tender |
| Built | 1911-1923 |
| Manufacturers | Breda;Ansaldo;Henschel |
| Wheel arrangement | 1D |
| Gauge | 1435 mm |
| Length | 18075 mm |
| Service mass | 66500 kg |
| Top speed | 65 km/h |
| Power | |
| Engine |
General
| Property | Italian State Railway class 740three-axle tender |
|---|---|
| Built | 1911-1923 |
| Manufacturers | Breda, Ansaldo, Henschel |
| Wheel arrangement | 2-8-0 (Consolidation) |
| Gauge | 1,435 mm |
Dimensions and weights
| Property | Italian State Railway class 740three-axle tender |
|---|---|
| Length | 18.08 m |
| Wheelbase | 7.30 m |
| Empty mass | 59.8 t |
| Service mass | 66.5 t |
| Adhesion mass | 56.4 t |
| Total mass | 98.4 t |
| Rigid wheelbase | 3.00 m |
| Axle load | 14.1 t |
| Water capacity | 12,000 l |
| Fuel capacity | 6 t (coal) |
Boiler
| Property | Italian State Railway class 740three-axle tender |
|---|---|
| Grate area | 2.86 m² |
| Firebox surface | 10.7 m² |
| Tube heating surface | 141.9 m² |
| Evaporative heating surface | 152.6 m² |
| Superheater surface | 53.3 m² |
| Total heating surface | 205.9 m² |
Power plant
| Property | Italian State Railway class 740three-axle tender |
|---|---|
| Driver diameter | 1,370 mm |
| Boiler pressure | 12 bar |
| Expansion type | simple expansion |
| Cylinders | two, 540 x 700 mm |
Power
| Property | Italian State Railway class 740three-axle tender |
|---|---|
| Power source | steam |
| Indicated power | 720 kW |
| Top speed | 65 km/h |
| Starting effort | 152.0 kN |
Calculated values
| Property | Italian State Railway class 740three-axle tender |
|---|---|
| Factor of adhesion | 1 : 3.64 |
| Optimal speed | 29 km/h |
| Power-to-weight ratio | 10.8 kW/t |
| Heating Surface Equivalent | 312.7 m² |
| Cylinder volume/HSE | 1 : 1,025.36 |
| Adhesive weight/Total | 1 : 1.18 |
| Tractive force/Heating surface | 1 : 15.42 |
| Grate area/Heating surface | 1 : 71.99 |
| Firebox/Tube surface | 1 : 13.26 |
| Total/Superheater | 1 : 2.86 |
