This is a reproduction of a Ruston steam traction engine.
The vehicle weight is:1240 g

Gives technical:
-2 Cilinder engine
-air regulator
-gearbox for: forward-neutral-reverse
-air pneumatic whistle
-a wheel brake

The flywheel (400 g) makes sinuos the motion of the engine, who it run at a maximum speed
of 400rpm (gear ratio 3:1). The engine work from 1.5 Bar up to 3 Bar.The steer is made with a 
4x4 turntavle with a chain link to the steer wheel in the cab (sorry but i don't speak english very well!)