This is a vehicle powered by a heat engine, modeling physics of the Carnot cycle.
This engine is optimized for a somewhat low-spec PC, by decrease in number of particles, mild settings, etc. The maximum speed is therefore lower than that of the previous one.
Air friction should be OFF, because molecules do NOT feel air friction in the real world

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After the idling gets stable, please erase a box under the machine. Then, the machine will start to run.
The detail description is seen at
http://youtube.com/watch?v=SQ4XnivrCog