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State Railway Company class 26
Imperial-Royal State Railways class 406, Czechoslovak State Railways class 264.2 and Hungarian State Railways class 227
Austria-Hungary | 1900 | 16 produced
Works photo of 2605
Works photo of 2605

In order to make the leap to express locomotives with compound engines, the private state railway company had already built a single locomotive with a three-cylinder compound engine in 1897. This was known as number II 144 or class 25 and had a high-pressure cylinder with a diameter of 470 mm and two low-pressure cylinders with a diameter of 500 mm each. Since the compound principle did not prove its worth, the almost identical diameter of the cylinders was used and operated as a three-cylinder locomotive with simple steam expansion. Based on this experience, the decision was made to use a simple saturated two-cylinder locomotive when procuring the series machines until better solutions became available.

The 16 locomotives of this series were again delivered from the StEG's own workshops between 1900 and 1902 and classified as class 26. With a cylinder diameter of 490 mm, slower acceleration can be expected than with the prototype locomotive, but more powerful boilers were installed than with the contemporary kkStB 4-4-0 express locomotives. When the StEG was nationalized in 1909, these locomotives were assigned to the class 406 and the II 144 to the class 506. After the First World War, most of the examples went to Czechoslovakia. There, 14 of the class 406 became the 264.2 and one of the class 506 became the 264.301. After the Second World War, two of them ended up with MÁV in Hungary, where they became the class 227.

General
Built1900-1902
ManufacturerStEG
Axle config4-4-0 (American) 
Gauge4 ft 8 1/2 in (Standard gauge)
Dimensions and Weights
Length loco35 ft 9 7/16 in
Wheelbase24 ft 1 3/8 in
Fixed wheelbase9 ft 2 1/4 in
Empty weight108,467 lbs
Service weight122,577 lbs
Adhesive weight62,611 lbs
Water capacity3,566 us gal
Fuel capacity11,905 lbs (coal)
Power
Power sourcesteam
Estimated power1,006 hp (750 kW)
Optimal speed35 mph
Top speed56 mph
Starting effort18,282 lbf
Power Plant
Driver diameter83.5 in
Boiler pressure188 psi
Expansion typesimple
Cylinderstwo, 19 5/16 x 25 9/16 in
Boiler
Grate area33.4 sq ft
Firebox area137.8 sq ft
Tube heating area1,864.3 sq ft
Evaporative heating area2,002.1 sq ft
Total heating area2,002.1 sq ft
Calculated Values
steam locomotive
express
last changed: 01/2022
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