4-6-0 Steam Locomotives in Sweden

Class H/A3 (Locobase 20208)

Data from Litt-A3, one of a series of SJ locomotive diagrams archived by Anders Lundbing on [], last accessed 10 June 2017 (Snabcon AB advertised its tools for mounting RJ45 connectors on bundled cables.)

This class and the three A2s (Locobase 20207) of the Statens Jarnvagar were converted in the late 1920s from five of the 1908 Class A Atlantics described in Locobase 2781. The SJ engines deleted the trailing truck and substituted a third driving axle, but otherwise retained much of the A's proportions and dimensions.

This trio were made over to accommodate requirements for lower axle loadings and more starting power.

(NB: Although the locomotive diagram did not include the evaporative or heating surface areas, the tube and flue inner and outer diameters and lengths as well as the superheater tube diameters were identical. Locobase used the A2 data and adjusted for slightly more tubes and slightly fewer flues to generate the estimated areas. Locobase's specifications show the evaporative heating surface area using the tubes' outer diameter (i.e., the water side). Using the narrower, fire-side diameters of 44.5 mm and 122 mm produced a total estimated EHS of 139.6 sq m (1,503 sq ft).)