Locomotive BB 433

Locomotive BB 433

Twin locomotive equipped with two Asynchro gearboxes that drive the reversing axles through cardan shafts. Each reversing bridge drives the other axle of the bogie via connecting rods.

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

General characteristics

Diagram BB 433
Diagram BB 433

Technical data

Characteristics BB 433
FeaturesBB 433 Variant BB 400
RouteNormal Metric
Total weight56 tonnes44 tonnes
Longueur1174010760
Bogie pivot spacing55004850
Bogie wheelbase2000
Wheel Diameter860
Minimum curved inscription rail50 metres
Maximum speed56 km/h45 km/h
Hook effort (limited by adhesion)18 tonnes 16 tonnes
2 Diesels overall power440 to 540 hp414 hp
2 CouplersFerodo
2 GearboxesCFD Asynchro 7-speedCFD Asynchro 8-speed
2 Inverter bridgesCFD

Power curve

Tensile curve BB 433
Tensile curve BB 433

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