FS Gr 623 & 625 Locomotives
FS Gr 623 & 625 Locomotives
The class 625 locomotive is an evolution of the excellent previous model class 600 locomotive.
The 625 is a simple expansion locomotive with superheated steam (schmidt superheater).
The running gear is 1 3 0 and the drive wheels are 1510mm.
The locomotive is powered by 2 pistons which operate a Walschaerts piston system.
The boiler of the locomotive is the same as the class 640: it develops the same amount of steam and the same power (800hp) but this vehicle can reach higher speeds thanks to the large diameter of drive wheels.
The mass of the locomotive is 54.5t, while the tender is 35.3t. The tender can carry 15 cubic meters of water and 6t of coal.
The vehicle is equipped with a compressed air brake and steam heating for the towed carriages.
In the 50’s, some units of the group were equipped with the Franco-Crosti pre-heater, a system that was able to use the exhaust’s steam to pre-heat the water for the boiler, resulting in coal save for the consumption. The new group was named “623”.
Mod Info
Power from 588 to 676kw
Tractive effort from 95 to 122kN
Max speed 80 km/h
Year from 1910
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