Editing 4-8-2 (section)

===Bulgaria===
In 1941, the [[Bulgarian State Railways]] (BDZ) placed an order with [[Henschel & Son]] in Germany for fifty BDZ class 03 express passenger locomotives. They were of the type {{nowrap|2′D1′h3S}} (2-4-1 axle arrangement, simple steam expansion, superheating, three-cylinder, fast train service) and were designed to be capable of hauling heavy passenger trains over the often severe profiles of the {{RailGauge|4ft8.5in|al=on|allk=on}} Bulgarian mainlines, with gradients of up to 2.8%.

The first two locomotives were delivered by the end of 1941. During trials, it proved that the specifications of the BDZ designing engineers were correct and that they had successfully overcome the shortcomings of insufficient power and some construction problems that had been experienced with the BDZ [[2-8-2|{{nowrap|2-8-2}} Mikado]] class 01 {{nowrap|1′D1′h2S}} and class 02 {{nowrap|1′D1′h3S}} locomotives. Mass production began the following year, but was interrupted by war restrictions introduced by the German authorities and delivery was halted before the full order was filled. Only ten more locomotives were built and delivered at the end of 1942 and early 1943, and the total number of the BDZ class 03 remained at twelve locomotives, numbered 03.<small>01</small> to 03.<small>12</small>.

After 1958, these locomotives were gradually converted to mixed fuel oil and coal firing, which resulted in improved steaming ability and better performance, particularly on mountainous lines. During their 35 years of service, they exhibited excellent performance with only minor problems such as oval wear on the leading axle's inside crank. After factory repair, one of these locomotives, no. 03.<small>12</small>, was preserved in the depot at [[Gorna Oryahovitsa]] and returned to operation for tourist trains. {{Citation needed|date=November 2012}}