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French Northern Railway No. 2.641 to 2.675
The first series-built compound Atlantics of the de Glehn system were the locomotives of the French Nord, which were delivered from 1900. They were designed to maintain the speed of 200-tonne express trains at 100 km/...
| French Northern Railway No. 2.641 to 2.675Remove | |
|---|---|
| Variant | prototypes |
| Built | 1900 |
| Manufacturers | SACM |
| Wheel arrangement | 2B1 |
| Gauge | 1435 mm |
| Length | |
| Service mass | 63000 kg |
| Top speed | 130 km/h |
| Power | |
| Engine |
General
| Property | French Northern Railway No. 2.641 to 2.675prototypes |
|---|---|
| Built | 1900 |
| Manufacturers | SACM |
| Wheel arrangement | 4-4-2 (Atlantic) |
| Gauge | 1,435 mm |
Dimensions and weights
| Property | French Northern Railway No. 2.641 to 2.675prototypes |
|---|---|
| Wheelbase | 8.50 m |
| Service mass | 63 t |
| Adhesion mass | 32.5 t |
| Total mass | 108.5 t |
| Rigid wheelbase | 2.13 m |
| Axle load | 16.2 t |
| Water capacity | 20,000 l |
| Fuel capacity | 5 t (coal) |
Boiler
| Property | French Northern Railway No. 2.641 to 2.675prototypes |
|---|---|
| Grate area | 2.74 m² |
| Firebox surface | 15.24 m² |
| Tube heating surface | 193.22 m² |
| Evaporative heating surface | 208.46 m² |
| Total heating surface | 208.5 m² |
Power plant
| Property | French Northern Railway No. 2.641 to 2.675prototypes |
|---|---|
| Driver diameter | 2,040 mm |
| Boiler pressure | 16 bar |
| Expansion type | compound |
| Cylinders | four, HP: 340 x 640 mm and LP: 560 x 640 mm |
Power
| Property | French Northern Railway No. 2.641 to 2.675prototypes |
|---|---|
| Power source | steam |
| Estimated power | 900 kW (1,224 PS) |
| Top speed | 130 km/h |
| Starting effort | 72.1 kN |
| Starting effort simple | 86.5 kN |
Calculated values
| Property | French Northern Railway No. 2.641 to 2.675prototypes |
|---|---|
| Factor of adhesion | 1 : 4.42 |
| Optimal speed | 76 km/h |
| Power-to-weight ratio | 14.3 kW/t |
| Heating Surface Equivalent | 284.7 m² |
| Cylinder volume/HSE | 1 : 962.01 |
| Adhesive weight/Total | 1 : 1.94 |
| Tractive force/Heating surface | 1 : 7.22 |
| Grate area/Heating surface | 1 : 76.08 |
| Firebox/Tube surface | 1 : 12.68 |
