Statens Jarnvagar 2-4-0 Locomotives in Sweden

Class C/Ca (Locobase 20375)

Data from Titre Exposition universelle internationale de 1878 a Paris. Rapports du jury internationale..Volume Groupe VI - Classe 64. Rapport sur le materiel des chemins de fer. p. 50 (cnum.cnam.fr/CGI/fpage.cgi?8XAE277-11.1/54/100/312/0/0 (accessed 1 September 2005). See also Data from "C, Ca-Loken" in "Rullande Materiel", Historiskt om Svenska Jarnvagar, on the web at [], last accessed 13 May 2018.

Several builders supplied engines in this class. Borsig, which produced the first 18 Ds in 1875, turned 14 C in the same year (works numbers were 3368-3373, 3420-3427)and added 2 in 1876 (3536-3537 in 1876). Nydquist & Holm (NOHAB) added 2 in 1879 (works numbers 112-113). Motala's contribution included in 2 in 1882 and 2 more in 1893

As noted in the entry for D-class 2-4-0s, a standardization program instituted by Fredrik Almgren of the railway called for three different types using the same boiler, Belpaire firebox, and cylinder design and as many components as possible. In addition to the B-class 2-4-0 dual-service locomotives and the K/Ka class 0-6-0 freight engines, these 2-4-0s hauled the fastest trains.

All were redesignated Ca to recognize the imminent arrival of the later Cb 4-4-0s (Locobase 10796). Three-axle tenders added in 1890-1892 provided more coal and water and thus greater range.

Class D/Da, Db (Locobase 6882)

Data from Titre Exposition universelle internationale de 1878 a Paris. Rapports du jury internationale..Volume Groupe VI - Classe 64. Rapport sur le materiel des chemins de fer. p. 50 (cnum.cnam.fr/CGI/fpage.cgi?8XAE277-11.1/54/100/312/0/0 (accessed 1 September 2005). See also "D-Loken" in "Rullande Materiel", Historiskt om Svenska Jarnvagar, on the web at [], last accessed 13 May 2018. Several builders supplied engines in this class. Borsig built the first 18 in 1875, Nydquist & Holm (NOHAB) 4 in 1876 and 2 in 1878, and, most numerous of all, Motala supplied 26--3 in 1877, 5 in 1880, 8 in 1883-1885, 10 in 1886-1887,

The Jury's report on page 92 noted the relatively small drivers, which indicated service at moderate speeds. The Belpaire firebox is credited with a relatively large grate. The Ds were part of a standardization program instituted by Fredrik Almgren of the railway. In addition to the C-class 2-4-0 express passenger locomotives and the K/Ka class 0-6-0 freight engines, these 2-4-0s filled an in-between spot as dual-services locomotives.

All were redesignated Da in 1881 and were later subdivided into Da1 and Da2 based on the number of tubes in the boiler. Except for the 185 and 239, the Da1 designation applied to all of the Borsigs, all of the Nohabs, and the first 11 Motalas. Da2 denoted the two Borsigs mentioned above and the last 15 Motalas.

Three more Motalas were delivered in 1891 and used a boiler with a round-top firebox. They were numbered 400-402.

Class K/Ka/Kb (Locobase 20376)

Data from "K, Ka, Kb-Loken" in "Rullande Materiel", Historiskt om Svenska Jarnvagar, on the web at [], last accessed 13 May 2018; and Stig Lundin's reproduction of the I SJ minnesskrift "Statens JSrnvSgar 1856-1906" "Tabel ofver lokomotivens hufvuddimensioner, vikter och anskaffningskostnad" originally available in 2004 at [] . Several builders supplied engines in this class. Borsig produced the first 10 in 1875. After the modifications shown below, Borsig continued with 5 more in 1876. Nydquist & Holm (NOHAB)'s 3 followed in 1877. Motala's contribution of 10 occurred during 1878-1879 while NOHAB added3 more in 1878. Motala finished off the class with 10 in 1879.

As noted in the entry for D-class 2-4-0s, a standardization program instituted by Fredrik Almgren of the railway called for three different types using the same boiler, Belpaire firebox, and cylinder design and as many components as possible. In addition to the B-class 2-4-0 dual-service locomotives and C/Ca class 2-4-0 passenger engines, these 0-6-0s were the freight haulers.

Borsig's first ten engines were Ks and used the same boiler and cylinders as the 2-4-0s. But the design proved unequal to freight demands and it was modified with more boiler tubes and a larger firebox as well as increased diameter cylinders.

The result was the Kb, which superseded the Kas in production. Measured inside, the tube diameter was 44.5 mm and afforded 73.77 sq m (79 4 sq ft) of heating surface area. Locobase uses the 50 mm external diameter shown in the Swedish table.

Most were scrapped at the end of the 20th Century's first decade or in the second, but 246 went to the SWB in1906 as their Kb and 245 and 248 were sold to the OSK as 20 and 23 in 1912 and 1916. respectively.