How solar vehicles work;Solar power;Science amp; technology
The design principles for a fast solar car are straightforward. Any losses in the electrical system, transmission and motor must be minimised. After this the two key areas are rolling resistance and aerodynamic drag. Rolling resistance is improved by reducing vehicle weight, good tyre selection and careful set-up of steering and suspension systems. Aerodynamic losses are governed by the car's frontal area, drag factor and speed. Aerodynamics become noticeable at speeds in excess of 60 km per hour and after that become increasingly dominant.