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The soldered chassis of the railcar model. The arrangement of the profiles follows the prototype. |
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The chassis front view. The central opening is wider than on the prototype in order to accommodate the motor. Later the opening was cut longer to make the general arrangement similar to those of the prototype. |
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The model's drivetrain. In the first version not the same wheelset was driven as in the prototype but the other one. Later I rotated the superstrucure on the chassis in order to follow better the internal room arrangement. In this case it was necessary to add a drive shaft between the motor and the gearbox. But this picture still shows the original layout. |
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Parts of the superstrucure before the assembly. The rivet rows are already soldered on the surface. This job would be much more difficult to perform after the assembly. |
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During the first run tests it became obvious that the structure is a way too light. It could not even run stand-alone, the wheels slipped. Thus lead sheets of 2mm thickness were glued into both driver's cab. |
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The BCmot railcar prototypes were not equipped with locomotive headlights but they had simple truck type headlamps. These are smaller than the locomotive lights and were mounted on an angle iron. But they almost touched the body! It was impossible to install so tiny lamps on the model. Not even the smallest SMD LED would fit there. Thus I drilled a small, 0.8mm hole in the body behind the lamp and a lightguide forwards the light from an internal LED to the headlamp. |
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The roof was made using 3D printing. This was my first experiment with this technology. The roof was constructed from 3 separate parts and glued together. The braces on the top were also part of the design. But their appearance is far from perfect. Their edges show visible steps. The roof was made in 2012, perhaps the 3D technology improved since then. But I applied never more braces on 3D printed surfaces and made all roofs as one single component. |
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The construction of the radiators on the rooftops was a real challange. The grille was made using my small CNC milling machine. This procedure was similar to the milling of the Kandó-electric loco grilles in 1992. The back side of the radiators was made from fine brass filter mesh. |
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The first assembly test of the model. The structure is ready but many small components are still missing. Thus it appears a bit bare. |
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The RTR mainframe of the model. Here you see the motor on the final side. The internal walls are placed similarly to the prototype's arrangement. On the top one can see the socket for the Plux-type DCC decoder. Its wiring is fixed to the internal wall. The small sockets are for conneecting the headlights and the capacitor buffer glued on the internal surface of the roof. |
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Top view of the chassis. The motor, the long cardan shaft, the decoder socket and the wires are well visible. |
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The body with the assembled roof, bottom view. Inside the roof one can see three, 470uF capacitors. Three small capacitors are less visible through the windows than one big one. |
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Side view of the ready made model. It is ready for painting. |
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The model in semi profile. The buffer plates are not yet mounted as the paint could fill the hole and disable the spring buffer moving after. During airbrushing a small plug was inserted in the holes. |
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Top view. It was a hard job to file the braces flat. |
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Front view of the model. The prototype was not equipped with handrails on the gangway, probably it was never intended for passenger use. |
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Bottom view. The cover of the motor is not prototypical, in the model it is much wider, as the model's motor is located below. The small accessories on the protoype chassis made much headaches. Almost all pictures show different arrangement. |
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This page was updated last time on October 28th, 2023
© Erő János
