French Northern Railway No. 401 to 436
French Northern Railway No. 2.401 to 2.436
France 1856 36 produced
The French Nord received a total of 36 Engerth supporting tender locomotives for passenger transport in 1857 and 1858. They only had two driving axles with large wheels and three axles for the tender. The wheelbase between the driving axles was relatively large in order to achieve good running stability.
From 1873 onwards, eleven locomotives were rebuilt into 0-4-2 tender locomotives in the Nord workshops by separating the tender with the two axles underneath from the locomotive and installing a trailing axle instead of the first tender axle. Later, both the rebuilt and the non-rebuilt ones were used in Lille's suburban traffic. The retirements took place between 1910 and 1913.
Technical data
General
| Property | as built | rebuilt B1 |
|---|---|---|
| Built | 1856-1857 | 1873 |
| Manufacturers | Esslingen, Charbonnier et Cie., La Chapelle | La Chapelle |
| Wheel arrangement | 0-4-6T (Engerth) | 0-4-2 |
| Gauge | 1,435 mm (Standard gauge) | |
Dimensions and weights
| Property | as built | rebuilt B1 |
|---|---|---|
| Wheelbase | 8.00 m | 5.05 m |
| Service mass | 47.7 t | 31.5 t |
| Adhesion mass | 21.7 t | 22 t |
| Rigid wheelbase | 2.70 m | |
| Axle load | 11.4 t | 11.6 t |
| Water capacity | 5,500 l | |
| Fuel capacity | 1.6 t (coal) | 3 t (coal) |
Boiler
| Property | as built | rebuilt B1 |
|---|---|---|
| Grate area | 1.35 m² | 1.7 m² |
| Firebox surface | 8.5 m² | 8.2 m² |
| Tube heating surface | 127.25 m² | 97.4 m² |
| Evaporative heating surface | 135.75 m² | 105.6 m² |
| Total heating surface | 135.8 m² | 105.6 m² |
Power plant
| Property | as built | rebuilt B1 |
|---|---|---|
| Driver diameter | 1,740 mm | |
| Boiler pressure | 8.3 bar | |
| Expansion type | simple expansion | |
| Cylinders | two, 420 x 560 mm | two, 420 x 5,600 mm |
Power
| Property | as built | rebuilt B1 |
|---|---|---|
| Power source | steam | |
| Estimated power | 250 kW (340 PS) | 260 kW (354 PS) |
| Starting effort | 40.1 kN | 400.5 kN |
Calculated values
| Property | as built | rebuilt B1 |
|---|---|---|
| Factor of adhesion | 1 : 5.31 | 1 : 0.54 |
| Optimal speed | 39 km/h | 3 km/h |
| Power-to-weight ratio | 5.2 kW/t | 8.3 kW/t |
| Heating Surface Equivalent | 178.3 m² | 146.6 m² |
| Cylinder volume/HSE | 1 : 870.52 | 1 : 10,584.55 |
| Adhesive weight/Total | 1 : 2.20 | 1 : 1.43 |
| Tractive force/Heating surface | 1 : 6.16 | 1 : 79.22 |
| Grate area/Heating surface | 1 : 100.56 | 1 : 62.12 |
| Firebox/Tube surface | 1 : 14.97 | 1 : 11.88 |