VT-95 serije K-1 DMK Uerdingen

History

Author: Milan Janković

Early railway lines, primarily serving industry, eventually began to transport passengers, initially using freight cars for passengers. Soon, special passenger cars appeared as the railway network rapidly expanded, leaving some lines with less traffic. It became economically impractical to use locomotives for a few wagons on these lines. To fulfill various concession agreements, passenger transport had to continue. Therefore, in the early 1850s, the idea of a self-propelled train with a steam engine and passenger cars on a common frame, known as an “autotrain,” emerged. Then came vehicles resembling passenger cars but containing steam engines inside to accommodate dozens of passengers. Such self-propelled vehicles are called railcars or rail buses. However, the steam engines propelling these vehicles were limited in power, mostly capable only of driving the car itself and perhaps an additional car on a straight railway track. Despite the advantages of these devices for local and suburban railways, they had drawbacks compared to steam traction.

Autobus pretvoren u železničko voziloAt the beginning of the 20th century, someone came up with the idea of converting buses into railway vehicles, further reducing maintenance costs and simplifying their use. This gave rise to the term “rail bus,” which became the basis for its name in many languages: ferrobús (Spanish), rälsbuss (Swedish), sínbusz (Hungarian), schienenbusse (German), etc., known as “šinobus” in our regions. However, as technology advanced, there was a transition from gasoline to diesel engines, and electrically powered rail buses also emerged. With the need to add additional cars on some routes, the collective term for such a train configuration became “railcar,” or depending on the power source, they were called diesel trains or electric trains. The development of railcars continued due to numerous advantages, especially greater efficiency compared to trains pulled by locomotives. They offered better acceleration (which was particularly noticeable on lines with frequent stops), eliminated the need for a locomotive, allowed the station to become both the starting and ending point without extensive preparations, and enabled the coupling of several railcars if necessary to increase passenger capacity, while maintaining similar acceleration and braking performance as a unit. In contrast, additional cars significantly affect the acceleration and braking of traditional trains pulled by locomotives due to their lower weight per axle, allowing them to operate on railways with lower carrying capacity. However, railcars also have disadvantages compared to traditional trains pulled by locomotives, such as increased noise (from the propulsion motor) and the need for passengers to change trains in case of engine failure (unlike replacing the locomotive while passengers remain in the cars).

Deutsche Bundesbahn

The Deutsche Bundesbahn (DB), abbreviated DB, was founded in 1949 in West Germany. On local railway lines of that time, steam traction was considered uneconomical, which led the DB to seek the creation of a diesel train with the following specifications: a two-axle vehicle with a unique coupling system (incompatible with other vehicles such as wagons or locomotives) with a central coupling system designed to connect a specially designed trailer; a minimum of 40 seats and a toilet; the powertrain, transmission, and other components were to be sourced from high-volume production buses to reduce costs; a maximum length of 10 meters and a width of 3 meters; a metal body; and a maximum speed of 90 km/h. In 1949, additional details for the future diesel-hauled train were agreed upon during a meeting with representatives from the Uerdingen factory. All trains were painted red and proved to be excellent in operation.

To switch massively from steam to diesel traction, it was necessary to reduce procurement costs. Furthermore, for wider use of diesel trains, it was necessary to ensure spare parts availability and stable maintenance support. Based on this, a decision was made to acquire a license, and the diesel trains would be produced in Yugoslavia. From today’s perspective, operating these diesel trains is straightforward, as they are operated like road vehicles (with pedals, a gearbox, etc.), but this was in the 1950s. For example, in 1953, Yugoslavia had 1,562 buses, 10,049 passenger cars, and 19,641 trucks. What do these data show? They show that most locomotive engineers did not have the opportunity to familiarize themselves with the operation of road vehicles, so rail buses posed a challenge. They were not used in the way engineers were accustomed to (like with steam locomotives), so additional training was required. Steam traction had been associated with railways from the very beginning, so this represented a revolution in rail transport.

GošaThe Goša factory in Smederevska Palanka was responsible for conquering the production of this diesel train. The factory had experience with road vehicles and steel structures (such as buses and trucks). The first diesel-hauled train produced in Smederevska Palanka was put into operation in 1959. Its designation was JŽ 812 (10-38). These diesel trains from Smederevska Palanka did not differ much from the original. The first twenty Goša rail buses were red. Goša rail buses were very similar to the German Uerdingen railway cars. The main visible difference was the absence of the Uerdingen logo, a different window style, and the absence of air vents above the second and sixth windows. After the initial run, Goša began releasing them in silver color, as we know them today. From JŽ 812-039 onwards, up to four sets can operate synchronously. Production lasted until 1969, with the last one labeled JŽ 812-275. A total of 266 sets were produced at Goša (from 000 to 009 originating from West Germany). This made them the most widespread diesel train in Yugoslavia, used on all railway lines. The large number also meant strong support for servicing and maintenance, prompting some railway companies to procure these vehicles even after production ceased. It was a revolutionary vehicle as it was the first to mass-replace steam traction in Yugoslavia.

Članak o prvoj turi Gošinih šinobusa

Article about the first tour of Goša’s red rail buses

 

Šinobus - Novi Sad 1960
The First Rail Buses in Yugoslavia

In its time, the diesel train was a very modern vehicle with solid performance (reaching speeds of 90 km/h, accelerating passenger traffic on many lines, especially local ones). However, it remained in use for too long, as more modern versions of diesel trains emerged, gradually overshadowing its once significant advantages. Due to its prolonged use, instead of being remembered as a modern means of transportation that revolutionized passenger traffic on Yugoslav railways, the rail bus was often referred to by passengers towards the end of its career as a “tin can” or “tin box.”

Crveni i srebrni šinobusi - depo Subotica

Red & silver šinobus – Subotica depot (photo credit: GradSubotica)