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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/...
General
| Property | French Northern Railway No. 2.641 to 2.675 production |
|---|---|
| Built | 1902-1904 |
| Manufacturers | SACM, Fives-Lille, SFCM |
| Wheel arrangement | 4-4-2 (Atlantic) |
| Gauge | 1,435 mm (Standard gauge) |
Dimensions and weights
| Property | French Northern Railway No. 2.641 to 2.675 production |
|---|---|
| Wheelbase | 8.50 m |
| Rigid wheelbase | 2.15 m |
| Service weight | 66.5 t |
| Adhesive weight | 33 t |
| Axle load | 16.5 t |
| Water capacity | 19,000 l |
| Fuel capacity | 4 t (coal) |
Boiler
| Property | French Northern Railway No. 2.641 to 2.675 production |
|---|---|
| Grate area | 2.74 m² |
| Firebox surface | 15.5 m² |
| Tube heating surface | 204.53 m² |
| Evaporative heating surface | 220.03 m² |
| Total heating surface | 220.0 m² |
Power plant
| Property | French Northern Railway No. 2.641 to 2.675 production |
|---|---|
| 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 2.675 production |
|---|---|
| Power source | steam |
| Estimated power | 925 kW (1,258 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 2.675 production |
|---|---|
| Factor of adhesion | 1 : 4.50 |
| Optimal speed | 79 km/h |
| Power-to-weight ratio | 13.9 kW/t |
| Heating Surface Equivalent | 297.5 m² |
| Cylinder volume/HSE | 1 : 920.40 |
| Adhesive weight/Total | 1 : 2.01 |
| Tractive force/Heating surface | 1 : 6.84 |
| Grate area/Heating surface | 1 : 80.30 |
| Firebox/Tube surface | 1 : 13.20 |
