Swiss Federal 2-6-0 Locomotives in Switzerland

Class Series B 3/4 (Locobase 3070)

Data from Gustav Reder (1974), pl. 241. See also data from the table presented on pages 379, 381 of the Groupe VI. - GTnie civil. - Moyens de transport. DeuxiFme partie. Classes 32 (Tome I), part of the series of Rapports du Jury Internationale of the Exposition Unverselle Internationale de 1900 Paris Exposition, hosted on the website of Le Conservatoire numTrique des Arts & MTtiers ([], Accessed 21 August 2005).

Designed by Rudolf Weyermann of the Jura-Simplon, this locomotive was built in the greatest numbers to a single design of all Swiss classes. A divided drive had the HP cylinder inside driving the lead axle and the two LP cylinders outside driving the middle one. Piston valves were actuated by three sets of Walschaerts gear ganged together but with the inside gear set for 10% later cutoff than the LP cylinders.

Reder gives the tonnage ratings as 200 tons up a 2% grade, 160 tons up 2 1/2% at 12 1/2 mph.

Class Series B 3/4 - simple (Locobase 4928)

This class appears to be a follow-on to the compound-expansion class built in the 1890s, delivered in 1905-1915 with superheating and simple expansion. [] (visited 6 October 2003) reports the Works numbers were 1634-1635 in 1905; 1789-1797, 1860-1869 in 1907; 1956-1965, 2046-2062 in 1909, 2150-2156 in 1911; 2353-2359 in 1913; 2483-2485 in 1914; 2557-2559 in 1915.

When the Swiss Confederation electrified its lines not long after, these engines were redundant. Retirements began in the 1930s, but many stayed in service through the 1940s and 1950s.