Patented twin-engine design
The twin-engine arrangement ensures that there is no traction break when changing gears that are not carried out simultaneously on both gearboxes. A CFD freewheel located at the gearbox output allows gear changes to be made while the locomotive is moving.
![BB 433 at Montmirail BB 433 at Montmirail](/temp-pictures/bb-433-at-montmirail_497.jpg)
General characteristics
![Diagram BB 433 Diagram BB 433](/temp-pictures/diagram-bb-433_690.jpg)