Yes the excavator uses a hydraulic system. The cogwhell pump is driven by a 500 motor and sets all components to 10 bar of hydraulic pressure. There are 3 hydraulic gliders to lift and lower the arm, and they got some nice ability to lift and dig in the sand.
The top of the excavator can turn cw or ccw in 360° angels all controlled by a ESC. Both driving belts are driven by two independent speed 500 motors through 2 ESC.
So the control and handling of the model is pretty much the same as of 1:1 excavator.
All is made in aluminium and with a million screws.
Battery is 10 x 1.2/3300 mAh (12V) which makes the model operational at aprox. 1-3 hours.
To controll the hydraulic movements, there is a tiny valve block with 3 mikro servos installed. This enables a linear movement of the gliders at any speed controlled by the servos. The hydraulic pump runs on same speed and pressure all the time, but I installed a electronic switch inside to stop the pump when hydraulic movements are not needed. Just to increase the lifetime of the pump.
