3.3. Propulsion unit and torque transmission
All six propulsion cylinders carry their motors inside (Figure 3). Their axes are fixed to the chassis and thus do not turn. The cylinders are pivoted on this axis with two ball bearings. The torque from the actuators (60W, 5Nm) is transmitted with a gear belt. For increasing the torque, an additional reduction of 2:1 is realized with this gear belt.