The reference for locomotives and railcars


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French Northern Railway No. 2.821 to 2.911 “Outrance”
France | 1870 | 103 produced
No. 2.910 that was already built as 4-4-0
No. 2.910 that was already built as 4-4-0
Fernand Fleury

From 1870, the Nord procured 2-4-0 express locomotives from André Koechlin with a driving wheel diameter of 2,100 mm or 6 ft 10 5/8 in. The leading axle could be shifted laterally by 10 mm. The frame was a double one with cylinders and valve gear on the inside and coupling rods with cranks on the outside. The nickname “Outrance” apparently came from the fact that the machines could be used “to the utmost” due to their durable design.

The initially installed boiler had a firebox with a round top, which lay between the driving axles. From 1877 a larger boiler was used, which had a Belpaire firebox that extended beyond the second driving axle. In addition, the boiler pressure was now 10 instead of 8.5 bars. To carry the extra weight, the leading axle was replaced with a bogie

No. 632, later 2.822, in original condition as 2-4-0
No. 632, later 2.822, in original condition as 2-4-0
Die Lokomotive, June 1936

The last batch, twelve of which were built in 1884 and 1885, again had only one leading axle, which was now radially adjustable. Between 1890 and 1898, all locomotives that still had a leading axle were rebuilt to a 4-4-0 wheel arrangement and fitted with the new boiler. Some received cylinders with a diameter of 460 mm and were called “Outrances renforcées”.

Built1870-18851877-1879, 1890-1898
ManufacturerKoechlin, SACM
Axle config2-4-0 (Porter) 4-4-0 (American) 
Gauge4 ft 8 1/2 in (Standard gauge)
Dimensions and Weights
Wheelbase18 ft 0 9/16 in20 ft 8 13/16 in
Fixed wheelbase18 ft 0 9/16 in8 ft 5 15/16 in
Empty weight72,422 lbs87,744 lbs
Service weight79,036 lbs94,799 lbs
Adhesive weight55,887 lbs63,052 lbs
Axle load28,991 lbs31,526 lbs
Water capacity2,113 us gal3,698 us gal
Fuel capacity6,614 lbs (coal)8,818 lbs (coal)
Power sourcesteam
Estimated power335 hp (250 kW)536 hp (400 kW)
Optimal speed24 mph33 mph
Top speed75 mph
Starting effort8,807 lbf10,356 lbf
Power Plant
Driver diameter82.7 in
Boiler pressure123 psi145 psi
Expansion typesimple
Cylinderstwo, 17 x 24 in
Grate area18.8 sq ft24.9 sq ft
Firebox area101.2 sq ft94.2 sq ft
Tube heating area883.4 sq ft975.2 sq ft
Evaporative heating area984.6 sq ft1,069.4 sq ft
Total heating area984.6 sq ft1,069.4 sq ft
Calculated Values
steam locomotive
last changed: 07/2023

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