The reference for locomotives and railcars


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Danish State Railways F
Denmark | 1898 | 132 produced
Number 654 from the last batch in 2008 in Kappeln
Number 654 from the last batch in 2008 in Kappeln

At the Danish State Railways, the class F comprised three different types of tank locomotives with a 0-6-0T wheel arrangement. The four examples of type I were originally tender locomotives built in 1873 by the British company Hawthorn, Leslie & Company for the Jysk-Fyrenske Jernbaner. In 1889 and 1890 they were converted into tank locomotives. Only eight examples belonged to type III, which were built by SLM in Winterthur in 1917 and delivered to Denmark after the end of the war. They were the only superheated steam engines in the series.

Type II accounted for by far the largest share with 120 units. It was unusual that these locomotives were built by different manufacturers in different countries over a very long period of time. From 1898, ten pieces were made by an Italian company Costruzioni Meccaniche di Saronno, which belonged to Maschinenfabrik Esslingen. Another 20 units from Breda (Italy), Hanomag and Henschel (Germany) and Smith, Mygind & Hüttemeier (Denmark) followed until 1903. Two further batches of 30 and 45 pieces each followed between 1909 and 1923 by Borsig and Hanomag (Germany), Frichs (Denmark) and Les Ateliers Métallurgiques Tubize (Belgium). Another 15 engines from Frichs followed in 1949.

The fact that 51 years after the first deliveries new locomotives were built in a technically almost unchanged design shows that even small tank locomotives with saturated steam were sufficient for shunting and that no more complex machines were required. Even the Allan valve gear was retained, which at that point had actually been out of date for a long time. The only changes were more modern buffers and a larger coal bunker. In the meantime, the existing locomotives had been fitted with air brakes instead of steam brakes. Nevertheless, they were phased out in the 1960s, since diesel locomotives were now available for shunting.

VariantF (II)F (III)
Built1898-1923, 19491917
ManufacturerCostruzioni Meccaniche di Saronno, Breda, Hanomag, Henschel, Smith, Mygind & Hüttemeier, Borsig, Frichs, TubizeSLM
Axle config0-6-0T (Six-coupled) 
Gauge4 ft 8 1/2 in (Standard gauge)
Dimensions and Weights
Length30 ft 1 in
Wheelbase12 ft 9 9/16 in
Fixed wheelbase12 ft 9 9/16 in
Empty weight67,241 lbs
Service weight80,910 lbs85,098 lbs
Adhesive weight80,910 lbs85,098 lbs
Axle load26,896 lbs28,440 lbs
Water capacity925 us gal
Fuel capacity3,307 lbs (coal)
Power sourcesteam
Indicated power247 hp (184 kW)
Estimated power241 hp (180 kW)
Optimal speed9 mph8 mph
Top speed31 mph
Starting effort16,901 lbf18,411 lbf
Power Plant
Driver diameter49.3 in
Boiler pressure174 psi
Expansion typesimple
Cylinderstwo, 16 x 22 1/16 intwo, 16 x 24 in
Grate area10.8 sq ft11 sq ft
Evaporative heating area610.3 sq ft539.3 sq ft
Superheater area282 sq ft
Total heating area610.3 sq ft821.3 sq ft
Calculated Values
steam locomotive
tank locomotive
secondary line
last changed: 02/2022

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