The traditional windscreen is mounted at the front of the motorcycle where it

The traditional windscreen is mounted at the front of the motorcycle where it

H O W I T W O R K S
(Shown on Harley-Davidson Roadking)
Without a fairing of some sort on the motorcycle, the rider takes the full brunt of the wind while trying to move through the air mass. This creates heavy turbulence against the rider's body and puts strain on your back and arms while you fight against it. End product: Fatigue! This buffeting gets exponentially worse as speeds increase and makes the motorcycle more susseptible to cross winds. Naturally you also become a human fly swatter as every flying meatball in your path splats against you.
The traditional windscreen is mounted at the front of the motorcycle where it breaks the air mass and takes pressure off your body. They are marginally better aerodynamically than having no windscreen. The forward positioning makes the front end unstable at higher speeds since wind pressure is forward of the steering head. It also creates a large, turbulent vacuum behind the fairing that can actually pull you forward and cause your helmet to lift. This is why you'll find dead bugs on your tank and lap after a long ride.
Corbin's Trimtab takes control of the wind and directs it rather than trying to shove it out of the way. This is where we gain aerodynamic efficiency. Trimtab shaping creates a laminar flow that is directed over the rider's head and to the sides leaving you sitting in a low pressure bubble. All the comfort and wind protection of a larger fairing without the buffeting or unstable behavior. Not that we would EVER recommend it, but we've found it works so well that you can ride down the freeway at 80mph without holding the bars.
Stability comes from control of the air flow and where it applies pressure on the fairing. The traditional windscreen takes most of the pressure forward of the steering head where it wants to push the front end to one side. Trimtab directs the wind back into a concentrated laminar flow. The highest point of pressure is the rear "flip" located behind the steering head. This actually pushes the fairing rearward and has what we call a "Rudder effect" which makes the front end very stable.
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