. INDIPENDENT 4x4 . 4x4 PERFORMANCE ON SNOW . WHEEL CAMBER - TYRE DEFLECTION . How does the tyre deflection look like . Torque converter . Resisting torque-vapour engine . X5 Dynamics in 3d . Handling - Z axis . Handling - no tail z axis . Elastic energy for traction dynamics - LEGO . Brakes on wheels - Real DSC . Model with real DSC function . Ergonomy practical test . X5 Jump . X5 Sistems . Torque coaching - real vapour engine . Ergonomy practical coaching . LEGO traction study: front-rear-4x4 . Vehicle dynamics about the three axis . Crock First version . Blu Spider Crock . Red Crock . Water Craft .