A common spoiler diffuses air by increasing amounts of turbulence flowing over the shape spoiling the laminar flow and providing a cushion for the laminar boundary layer.
Purpose of a roof spoiler.
A rear spoiler is that small piece of trim that usually extends from the edge of the trunk.
They are usually manufactured from polyurethane carbon fiber blow molded abs plastic or hand laid fiberglass materials.
However it is mostly now done for looks as it is an optional accessory same as the front bumper lip etc.
But that small disruption can have a major impact on overall aerodynamics.
It does so by spoiling the streamlined flow of air and providing a cushion like a boundary layer.
Roof spoiler is an aerodynamic device that is usually attached to the rear of car s roof.
The function of a spoiler varies depending upon the location where the carmakers install it i e.
It gives the very rear of a car a turned up appearance.
Which effect it is going to spoil.
Most of the roof spoilers are custom molded and need no modifications to mount.
As its name indicates a spoiler spoils the smooth flow of air over the back of a vehicle.
Well it does help with wind deflection a bit which i heard creates less drag and less stress on the motor.
It is custom designed to fit the upper window section and installs directly above the glass.
Then in return adds an extra 20hp or so to the wheels.