Originally Posted by B47
Not an engineer,but these tabs almost look to me as increasing drag.
The way they're mounted with the open end of the "Y" facing forward looks like air would be "trapped" as the RV moves forward causing increased drag.
I don't thing such a device would be mounted on aircraft for the purpose of reducing drag.
They weren't designed for aircraft.
From Air Tab: Application Notes and Considerations
Please Read the Following Installation Notes and Cautions Carefully:
ALWAYS read the installation instructions included with your order BEFORE installing Airtabs™.
Installation Instructions may be viewed here.
Airtabs™ must be installed when the vehicle skin and air temperature is above 40°F (5°C)
Attempting to install Airtabs™ when colder will yield unsatisfactory results.
The point of the AirtabŪ faces toward the back of the vehicle.
The scoop (wide part) of the AirtabŪ faces toward the front of the vehicle