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Imperial-Royal State Railways and Austrian Southern Railway class 206
Czechoslovak State Railways class 265.0, Polish State Railways Pd14, Italian State Railway class 555 and Hungarian State Railways class 225.3
Austria-Hungary | 1903
89 produced
kkStB 206.40 on a works photo of the Wiener Neustädter Lokomotivfabrik
kkStB 206.40 on a works photo of the Wiener Neustädter Lokomotivfabrik

The next step in the development of the 4-4-0 express locomotives after the classes 6 and 106 was the 206. Gölsdorf raised the position of the boiler in order to obtain a larger firebox heating surface. The result was a continuous output of 940 hp at 90 km/h. For reasons of visual appearance, the second steam dome with connecting pipe was omitted and the cab was designed with curved lines. The kkStB procured 70 machines and the southern railway 19 more. After the First World War, double-digit numbers were also in use in Czechoslovakia, Poland and Italy.

General
Built1903-1907
ManufacturerWiener Neustadt, BMMF, Floridsdorf, StEG, MÁVAG
Axle config4-4-0 (American) 
Gauge4 ft 8 1/2 in (Standard gauge)
Dimensions and Weights
Length53 ft 10 3/4 in
Wheelbase23 ft 11 3/8 in
Rigid wheelbase9 ft 2 1/4 in
Total wheelbase42 ft 7 9/16 in
Service weight119,490 lbs
Adhesive weight63,934 lbs
Axle load31,967 lbs
Water capacity4,438 us gal
Fuel capacity12,787 lbs (coal)
Boiler
Grate area32.3 sq ft
Firebox area129.2 sq ft
Tube heating area1,324 sq ft
Evaporative heating area1,453.1 sq ft
Total heating area1,453.1 sq ft
Power Plant
Driver diameter84.3 in
Boiler pressure188 psi
Expansion typecompound
Cylinderstwo, HP: 19 11/16 x 26 3/4 in
and LP: 29 15/16 x 26 3/4 in
Power
Power sourcesteam
Estimated power872 hp (650 kW)
Optimal speed40 mph
Top speed56 mph
Starting effort13,769 lbf
with start valve16,523 lbf
Calculated Values
steam locomotive
express
Karl Gölsdorf
last changed: 03/2023
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