The "Slovenska Strela" M 290.0 series rail motor coaches were produced in 1936 for the then Czechoslovak State Railways (ČSD) by Tatra in Koprivnice. The coaches possessed extraordinary design of the body, a very aesthetic rendition, and, above all, a unique electromechanical power transfer system by Josef Sousedik. Thanks to his patent, the coach was driven mainly by its electric drive - the mechanical transmission was engaged as the speed increased. The vehicle reached a speed of up to 130 km/h, touching 148 km/h during testing.
Two manufactured coaches, marked M 290.001 and 002, were put into operation on July 13, 1936. They were assigned to the depot of their home station in Bratislava and operated under the trade name of "Slovenska Strela" on the Prague – Brno – Bratislava route, with an average cruising speed of 92 km/h (steam trains at that time averaged 68 km/h). The coach was the first with compulsory seat reservation for the ČSD. The travel time was 4 hours and 51 minutes, including a stop-over in Brno, which lasted 35 minutes.
After World War II, the coaches were used for government purposes. The M 290.001 was retired in 1953. In the beginning of the 60’s, it burned out and was scrapped.
The M 290.002 was in government service until 1960, when it was handed over to the company museum of Tatra in Koprivnice. Now a full restoration of the coach, with the goal of reaching a fully functional state, is under way in Hranice.
V pondělí 25.5.2020 nastane další významný milník v projektu restaurování motorového vozu M 290.002 "Slovenská strela". Vůz bude přepravován z areálu ČMŽO-elektronika v Hranicích na Moravě do areálu mateřské firmy ČMŽO v Přerově, kde bude v nové moderní lakovně opatřen finálním nátěrem. Unikátnost přepravy spočívá v tom, že pod vůz byly zavázány původní zrestaurované podvozky a do Přerova tak bude přepravován po vlastních kolech. Po šedesáti letech se tak Slovenská strela vrací na naše koleje, byť zatím ještě nemůže jet vlastní silou.
Plánovaný čas odjezdu z Hranic je ve 14 hodin. V případě silných přeháněk se přesun uskuteční v úterý 26.5.2020 ve stejném čase.
Děkujeme regionalnitelevize.cz za krásnou reportáž o elektromotorech Slovenské strely. Nemůžeme se dočkat na to až budou motory přichystané v našich dílnách na montáž do podvozků. Kdo by řekl, že už to je rok a půl od doby co jsme Slovenskou strelu začali renovovat.
It's been a year since the company Macháč Motors s.r.o. took over the gasoline engines of Slovenské Strely. As you can see in the video, the first engine runs like a clockwork. The second engine is waiting for parts to be delivered and will be in functional state in the upcoming days. We thank the whole team for their excellent work.
Question: Regarding the image with ballast weights on the floor, I would like to ask you why the weights were there. Was this by chance a test of the vehicle body rigidity?
Answer: Those weights actually simulated the weight of the interior equipment + passengers during the carriage body rigidity test.
Question: Regarding the second image, what material was used for filling the carriage walls? It looks like foil.
Answer: With regard to minimizing the weight of the carriage, the wall filling was made of a four-layer aluminum foil. In those times it was called "alfol" and it was thermal insulation. The leaves were inserted loosely inside the frame, with plain threads securing them.
The following timelapse video shows the disassembly of the Slovak Arrow’s motor.
The steel structure of the vehicle body is gradually freed from the old paint using sandblasting, during which the interior must be reliably protected – so that the abrasive grains do not damage its components, especially the original ceiling paneling. For the most part, the paneling was left in place due to its good condition. Areas and profiles destroyed by corrosion are ground. Since this is a frameless enclosure, it must be maintained in the horizontal position by supports so that the removal of plates and stiffeners does not cause deformation (bending).
The car is completely dismantled, and the main components are pre-refurbished with a detailed inspection and assessment of their technical condition. The body will be repaired at the workshops of the general contractor for the recovery, ČMŽO s.r.o. of Přerov, and the body will pass through the restoration by a subsidiary company in Hranice, the petrol engines - at specialists in Kopřivnice. And the Sousedík drive unit – in Vsetín. The smaller equipment of the car will be gradually handed over for overhaul or for replacement, by professional restorers of several professions.
The old paint is removed from the body via sandblasting. The fiberboard panels behind windows and doors protect the interior from the flying grains of sand.
The corrosion damage of the body is mainly located on the car floor level, where the humidity is captured most of all. Damage also affects the rails and legs of the body.
Grinding of the corroded parts of the body is carried out after sections of approximately three metres in length. The body is vertically supported by posts and stiffened horizontally with splints and bars of profiled iron.
The front of the car. The torn plate under the national emblem is already repaired, but there is still a lot of work left to be performed on the window columns.
Still coupled drive unit – the six-cylinder petrol engine and the “Tatra” Sousedík drive.
“P” engine repairs - crankcase.
“P” engine repairs – removed pistons with connecting rods.