It would still require friction brakes of similar dimensionsautogyro wrote:Of course if we started to design ways to convert this brake heat directly into electrical energy, then that would be a whole new ball game would it not?syndony wrote:I suspect that inboard brakes in a modern F1 vehicle would require solutions to be found for several potential issues. A braking event is quite violent, so a structural engineer would like the torque tube to be stiff (hence large diameter) to avoid dynamic problems caused by the torque tube "winding up". On the other hand, an aerodynamicist would like the torque tube not to interfere with airflow, so he would like a small diameter tube (hence flexible). The unsprung weight reduction would be offset, to some extent, by the need to add a strong CVJ at either end of the torque tube. Cooling would be an issue that might be solved by water-cooling, but that solution would carry with it a weight overhead. Finally, there is not too much room at either axle to package inboard brakes in a modern F1 chassis
Not only would it be impossible to dimension a KERS system which can handle the sort of power consumed by friction brakes at peak load, which is in excess of 2000 kW, but the friction brakes would also be required at low speed when an electric machine lose braking torque. Friction brakes would also be required to serve as a back up in case of electrical failure.