Stato Piemontese 2-4-0 Locomotives in Italy

Class 111 (Locobase 20672)

Data from Ferrovie Dell' Alta Italia, Album Delle Locomotive (Torino, 1o Luglio 1876), T57. (For roster details, see Josef Pospichal's Lokstatistik at [], last accessed 14 August 2019.) Works numbers were 951-953 in 1848.

Small six-wheel shunter (switcher, "servizio di manovra") trio that seem to have had relatively short careers. Only one was renumbered by the Societe Ferrovie dell'Alta Italia (SFAI) in 1865. It remained in service at least long enough to come under the Rete Mediterraneo in 1865.

Locobase found an inconsistencies between the given values for the tube diameters, tube lengths, and for the evaporative heating surface area given as 46.2 sq m. The EHS value shown in Locobase's specs is composed of the firebox heating surface area given in the diagram and the tube heating surface area calculated from the stated tube length, external tube diameter, and count.

Class 111/202/60/170/595 (Locobase 20646)

Data from Ferrovie Dell' Alta Italia, Album Delle Locomotive (Torino, 1o Luglio 1876), T41. (For roster details, see Josef Pospichal's Lokstatistik at [], last accessed 14 August 2019.)

A typical six-wheeler carrying a long boiler on a plate frame. The firebox was suspended from the frame behind the rear set of drivers. After 14-15 years as passenger engines, the class was converted by Strada Ferrate Alta Italia (SFAI) to a six-coupled freight locomotive.

Locobase found an inconsistencies between the given values for the tube diameters, tube lengths, and for the evaporative heating surface area given as 96.0 sq m. The EHS value shown in Locobase's specs is composed of the firebox heating surface area given in the diagram and the tube heating surface area calculated from the stated tube length, external tube diameter, and count.

Class 187/354 (Locobase 20616)

Data from Ferrovie Dell' Alta Italia, Album Delle Locomotive (Torino, 1o Luglio 1876), T31. Works numbers were 882-896 in 1854

This locomotive's design seems small in many ways and had a low axle loading and its profile seems dated as well. The shallow firebox offered a modest direct heating surface area. The cylinders were placed outside the frame, but drove on cranks between the plate frames on each side. It was most likely delivered carrying only the steam dome on the boiler. The large sand dome was probably a later addition.

Even so, the class served for a relatively long time. By 1876, only two--354, 356-- had been scrapped.

Class 250/265 (Locobase 20609)

Data from Ferrovie Dell' Alta Italia, Album Delle Locomotive (Torino, 1o Luglio 1876), T24. (For roster details, see Josef Pospichal's Lokstatistik at [], last accessed 14 August 2019.)

A typical six-wheeler of the day, this class had its firebox dropped between the driving axles and the sandbox, small steam dome, and stack (chimney) situated well forward on the boiler. Small drivers reflected the mountainous profiles over which this class had to work. The lead driving axle (middle of all three) carried much more weight than did the other driver set.

Locobase found an inconsistencies between the given values for the tube diameters, tube lengths, and for the evaporative heating surface area given as 75.6 sq m. The EHS value shown in Locobase's specs is composed of the firebox heating surface area given in the diagram and the tube heating surface area calculated from the stated tube length, external tube diameter, and count.

Class 373 (Locobase 20618)

Data from Ferrovie Dell' Alta Italia, Album Delle Locomotive (Torino, 1o Luglio 1876), T33. Works numbers were 758-761 and 766-767 in 1850.

Although the haystack firebox was rapidly passing out of favor even by 1850, it appeared on this sextet of mixed-traffic six-wheelers. The firebox necessarily had a small grate and heating surface area. Outside cylinders drove cranks on the front pair of drivers.

All six were taken into the SFAI in 1865 and still on the roster in 1876.

Locobase found an inconsistencies between the given values for the tube diameters, tube lengths, and for the evaporative heating surface area given as 72.8 sq m. The EHS value shown in Locobase's specs is composed of the firebox heating surface area given in the diagram and the tube heating surface area calculated from the stated tube length, external tube diameter, and count.

Class 66/201 (Locobase 20595)

Data from Ferrovie Dell' Alta Italia, Album Delle Locomotive (Torino, 1o Luglio 1876), T16.

Compared to the single-driver Belgian locomotive shown in Locobase 20581, this class showed most of the same features including a haystack firebox, long boiler, inside cylinders, and a capped stack. But instead of a smaller trailing wheel in front of the firebox, the 201 had a second driving axle behind the firebox and under the footplate.

The Album data show the fireside evaporative heating surface area--64.7-- sq m, which was approximately 10.4% too low when compared to the sum of firebox heating surface area and the calculated tube heating surface area including the tubes' external (water side) diameter.. Locobase's specifications adjust the EHS to reflect the higher value.

Not long before its original railway merged into the Alta Italia, the SFAI scrapped the quartet in 1872-1874.