YolTrans Lab

How truck retarders work, as interactive 3D. Same downhill run on every page, so they compare.

• Hydrodynamic retarder - Volvo RET-TH: oil between rotor and stator, heat to the coolant
• Eddy-current retarder - Telma AF8: coils and finned rotors, heat to the air, fades as it heats