Bulgarian State 2-8-0 Locomotives in Bulgaria

Class 17 (Locobase 1592)

[] (viewed 18 July 2003) shows us the data and the details. Tube diameters are inner dimensions. See also L Renewal, "The Railways of Bulgaria", Cassier's Engineering Monthly, Volume 52, No 1 (July 1917), pp. 13-24 , esp Table of Principal Dimensions, p. 15.

Henschel and Sohn delivered all but ten with the first batch of 20 coming in 1912, 15 more in 1916, 10 in 1917, and 17 in 1925. Also in 1925 came 12 more from Skoda.

The design -- basically an enlarged Class 27 -- had a high-pitched boiler over relatively small drivers. The four-cylinder Wulff compounding system had HP inside, LP outside fed by a common slide valve (similar to the Vauclain system). The least long-lived of the class operated for 45 years with the longest enduring 58 years. They were used widely for mainline passenger work at first, later for light passenger and a variety of freight and switching work.

Class 27 (Locobase 1595)

[] (viewed 18 July 2003). Tube diameters are inner dimension.

Showing a tall boiler and very small drivers, this Consolidation needed a Krauss-Helmholz truck to negotiate the sharp curves on the lines it served. The rigid wheelbase was thus reduced to only 2.8 m (9.17 ft) . Trifonov says that Hanomag guaranteed pulling power sufficient to haul 200 tons of passenger and fast-freight trains up a 2.5% grade at 25 km/h (15.5 mph) and 65 km/h (40 mph) on the level.

Ten of these were superheated in 1934, for which see Locobase 5658.

Class 27 - superheated (Locobase 5658)

[] (viewed 18 July 2003). Tube diameters are inner dimension - add 8-10% to find tube surface area as measured by Anglo-American standards.

This is the superheated version, but the size of the superheater flues is unlikely.