kaiserlich-Koeniglichen Oesterreichischen StB 2-12-0 Locomotives in Austria

Class 100 (Locobase 2522)

Data from [], last accessed 13 April 2010; and "1f Vierzylinder-Heitzdampf-Verbund-Gerbirgslokomotive Bauart Goldsdorf mit Rauchrohrenuberhitzer Patent Schimdt, Serie 100 der k k oester. Staatsbahnen", Die Lokomotive, Volume 8, No 11 (November 1911), pp. 241-247. See also Gustav Reder (Michael Reynolds, trans), The world of steam locomotives (New York: Putnam, 1974); "New Locomotive Types, Austrian State Railways", The Locomotive, Volume XVII (15 July 1911), p.160-161; and Robert Tufnell, The Illustrated Encyclopedia of Railway Locomotives (London: Quarto Publishing Ltd, 1986). (Thanks to Alexander Blessing for his 4 February 2024 email pointing Locobase to the extensive German-language report in Die Lokomotive and for providing gallon equivalents for the tender's water and oil capacities.) Works number was 1996 in 1911.

Gustav Reder described this design as Karl Golsdorf's further attempt at getting sufficient adhesion on the Tauern Railroad and succeeding, although changes in circumstances led to its being a solo effort. LM's editor hailed it as the first twelve-wheel locomotive for express passenger use.

Adopting the boiler and valve motion of the 2-6-4 Adriatics, Golsdorf allowed substantial side play in several driving axles. The front Adams radial axle boxes had 50 mm (1.97"), third and sixth 26 mm (1.02"), and the last driving axle 40 mm (1.57"). The side rod between the fifth and sixth driving axle had universal joints. Thus, although the driving wheelbase was of unprecedented length, the fixed wheelbase was only 4.59 m (15.06 ft).

Golsdorf managed to balance the loading on all six driving axles.They had an impressively high boiler that stood well clear of the running gear. Each pair of cylinders (one HP, one LP) was served by a single piston valve that measured 460 mm (18 1/8").

Tonnage rating was 360 tons up a 2.8% grade at 25 mph, which equates to 2,100 indicated horsepower or 1,600 drawbar horsepower. According to LM, trials indicated that this engine rode steadily at 52.8 mph (85 km/h).

Only one such engine worked on the kKStB. It was satisfactory, but cylinder cracking doomed it to early retirement in 1927.