I often pondered this question when I was in my 20s.
It is now clear that it is impossible. Both motors have some energy loss (such as friction loss, wind resistance loss, heat loss, etc.). The energy of the entire system has been decreasing. According to energy conservation, it will eventually shut down.
Whether the windmill that generates electricity is solid or hollow
From the perspective of energy conservation, it will definitely increase the consumption of the car.
The streamlined body design is to reduce the wind resistance of the vehicle as much as possible. According to aerodynamics, if you add a protrusion on a streamlined surface, this protrusion will definitely increase the wind resistance coefficient of the vehicle. , that is, the driving resistance of the car increases.
According to the relationship of conservation of capacity, due to the efficiency problem of the wind turbine, there is mechanical wear and energy loss, so under the premise of receiving the same capacity, the power generated must be less than the resistance received by the car.
Hollow. Windmills that generate electricity are usually hollow rather than solid. The hollow windmill design can reduce weight, make the windmill easier to rotate, and reduce wind resistance. In modern wind turbines, the wind blades generally adopt a hollow blade structure, which can capture and utilize wind energy through the principle of aerodynamics to turn the generator to generate electrical energy. Solid windmill structures are used more for decorative and scenic viewing purposes and cannot generate electrical energy.