The following issues are:Drag: The drag coefficient is acommon measure in automotive design as it relates to aerodynamic. Drag is aforce that acts parallel and in the same direction as the airflow. The coefficientof a vehicle impacts the way the vehicle passes through the surrounding air.
Notingupon that, setting up the wind turbine generator in front of the electric carsgrill will initially create a certain type of drag known as pressure drag. Pressuredrag occurs when air flows past an object pushes harder against the front ofthe car than the rear. this is created when the shape of the vehicles grillchanges unexpectedly when fitting the wind turbine generator. Further more asthe vehicles speed increases, drag acting upon the vehicle generally increasingmuch greater therefore drag sets practical limits on the vehicles speeding notallowing the vehicle to fully perform its main task due to the level of dragtaking place. This potentially can justify that fitting the wind turbine canpossibly waste more energy than to produce it.Weight: Another important issue of theproject is weight which needs to be considered and discussed due to nowadaysmost of the car manufactures are always reducing their weight load in order fortheir vehicles to run as efficient as possible.
So fitting a wind turbinegenerator will eventually add weight to the car, this is a very big problemsince vehicle with a lot of weight have greater inertia also greater rolling resistancewhich both are linked to the increasing of energy consumption. for examples if anelectric car weighs about 2107kg and its accelerations from 0-60 mph is 2.3sthen if additionally, weight were to be added the time taken to accelerate from0-60 will be greater due to the vehicle taking longer to drive to its potentialspeed because of a greater weight carriage.However, noting the issuethere is always a known solution to an engineering project.