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Ferrovie Nord Milano class 290
Italy | 1931 | 4 produced
Die Lokomotive, February 1933

Although the FNM also operated an electrified suburban network around Milan, steam locomotives were needed for the more distant destinations. A tender locomotive was commissioned to speed up traffic, which should combine good acceleration with a maximum speed of 100 km/h. The order went to CEMSA, whose works in Saronno were located along the route of the FNM.

The four locomotives were apparently based on plans that came from Borsig. The 2-6-4T wheel arrangement was typical of modern passenger tank locomotives and combined good running characteristics with a large firebox and large supplies. The boiler delivered 1,060 hp permanently and 1,200 hp for short periods. The three cylinders, together with the 1,620 mm large coupled wheels, ensured good acceleration.

The locomotives were used to run direct connections from Milan to Como, Varese, Laveno, Erba and Asso. For some other routes, the axle load of 16.5 tonnes was too high. After the main routes had been electrified, these locomotives could not be used on the secondary routes. So they were retired in 1952 and scrapped shortly thereafter.

General
Built1931
ManufacturerCEMSA
Axle config2-6-4T (Adriatic) 
Gauge4 ft 8 1/2 in (Standard gauge)
Dimensions and Weights
Length48 ft 0 3/4 in
Wheelbase36 ft 7 in
Fixed wheelbase12 ft 9 9/16 in
Empty weight169,756 lbs
Service weight211,644 lbs
Adhesive weight109,129 lbs
Axle load36,376 lbs
Water capacity2,378 us gal
Fuel capacity5,512 lbs (coal)
Power
Power sourcesteam
Indicated power1,046 hp (780 kW)
Optimal speed18 mph
Top speed62 mph
Starting effort37,843 lbf
Power Plant
Driver diameter63.8 in
Boiler pressure232 psi
Expansion typesimple
Cylindersthree, 17 11/16 x 26 in
Boiler
Grate area33.4 sq ft
Evaporative heating area1,603.8 sq ft
Superheater area559.7 sq ft
Total heating area2,163.5 sq ft
Calculated Values
steam locomotive
passenger
express
tank locomotive
last changed: 03/2023
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