How do Airtabs work?

Airtabs generate vortices which help to control airflow around the vehicle, reducing drag, resulting in an increase in fuel efficiency. They work in the following areas:

 

Rear of Vehicle  

Whilst manufacturers have made significant progress in the streamlining of vehicle fronts, the rear of the Body has, on the whole remained unchanged. Air rushes down the sides and over the roof of a moving vehicle. At the rear the air from the sides rolls across the back of the vehicle. The air leaving the roof at the rear also rolls down the back. The result is a high degree of turbulence, which acts as drag pulling the vehicle back. The only way to overcome and compensate for this force is to use more energy ( fuel ).

Airtab helps to reduce this drag by spinning the air as it leaves the rear of the vehicle. Each vortex lasts several feet in length, keeping the airflow controlled and restricting it from becoming turbulent. This allows the vehicle to move forward more easily as it encounters less drag. The result is a reduction in required energy ( fuel ) to maintain the required
speed.

 

Gap between Tractor and Trailer

This area is a significant contributor in aerodynamic drag. If fitted, Air dams and skirts on Tractor units can improve airflow, but due to operational requirements it is impossible to close the gap completely. Even with the most sophisticated aerodynamic kits an amount of air finds its way into the gap causing drag.

Airtab works on standard Tractor Units, and in concert with air Deflector kits if fitted. Positioned down the rear edges and across the top of the cab or deflector, Airtab lifts and spins the air significantly bridging the gap between Tractor and Trailer. This reduces the turbulent air between the two so less drag is created. The result is a reduction in required energy ( fuel ) to maintain the required speed.

 

 

Other Applications

Airtabs can be used to in a wide number of applications on vehicles and trailers:

Airtab can reduce aerodynamic drag caused by wheels and wheel arches when placed forward of the wheel arch, as it lifts and spins the airflow past the subject area. This principle can be adopted for a variety of applications eg. They can be fitted to the rear of a trailer side skirt, in front of the leading axle. They are ideal for use on vehicle cabs and panel vans, pickups, caravans etc, in fact any application where there is a gap in the side of a vehicle.

Airtabs help to reduce drag caused by obstructions, such as light bars on emergency vehicles and roof racks. When Airtab is fitted in front of such items, it lifts and spins the air. The vortices clear either all or most of the obstruction resulting in a smoother airflow

The vortices created by Airtabs also assist any solid surface to move forward through air. Even if the lift of the vortex does not clear the obstacle, the air hitting it is turbulated and swirling. This disruption allows for easier forward movement than if the object was hitting a “wall” of still air. A specific example of benefit would be to fit Airtab to the cabs of vehicles with bodies significantly wider or higher than the cab.

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