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Old 03-25-2015, 05:15 PM   #11
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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

http://www.airtab.com/video-page.htm
Attached Files
File Type: pdf Airtab-install.pdf (1.15 MB, 23 views)
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Old 03-25-2015, 05:25 PM   #12
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OC - true about not being for aircraft,but drag,resistance forces,etc don't care if they are moving across an airfoil.RV, or any other moving object. When moving air encounters resistance,drag increases.
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Old 03-25-2015, 05:44 PM   #13
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OC - true about not being for aircraft,but drag,resistance forces,etc don't care if they are moving across an airfoil.RV, or any other moving object. When moving air encounters resistance,drag increases.
Ok.
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Old 03-25-2015, 05:55 PM   #14
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Interesting concept.

Looks better than a trailer tail:

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Old 03-25-2015, 06:00 PM   #15
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I have to agree.

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Old 03-25-2015, 06:05 PM   #16
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Might help a little when you're backing up.
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Old 03-25-2015, 06:17 PM   #17
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Might help a little when you're backing up.
You're hopeless B47 my friend.
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Old 03-25-2015, 06:19 PM   #18
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They reduce the vacuum on the back for the trailer that is what helps with sway and also keepsake back cleaner. My dad has them on his they do work. MPG remained about the same he said about .25 better
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Old 03-25-2015, 06:20 PM   #19
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You're hopeless B47 my friend.
And the same to you Sir.
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Old 03-25-2015, 06:24 PM   #20
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We've been looking at them, too. Here's how they are expected to work-by reducing rear "suction" Airtab | Aerodynamic Fuel Savers | How Airtabs Work
They supposedly take automotive paint, if you want to match them. We've been considering if they would do anything to reduce drag on front of Fifth, if we mounted them around the rear of the quad cab. For that matter, we've even looked at the fifth wings for the cab, which seem less popular than they were some years ago.
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