June 29, 2004

Gentlemen,

After seeing the Airtab® installation article in Monaco Coach's Lifestyles magazine I ordered a set for my 38' Monaco Diplomat motorhome. I returned from Dallas to New Braunfels with about a 30 mph crosswind all the way with intermittent rain to find my Airtabs™ on the front porch (quick delivery I might add). I installed them the same week in about 4 hours - it was amazingly simple, and they looked great! The next weekend I left for Houston, and traveling I-10 I had about a 25 mph crosswind and a lot of heavy truck traffic. This was not even the same coach!!!! The crosswind's effect was neglible, and even more amazing was the fact that passing trucks (I set the cruise at 65) had almost NO effect on the tracking of the coach. Two trips back to back in roughly the same conditions convinced me. Hats off for a great product. I haven't thought to check the boost gauge to see if the turbo is not working as hard, but there seems to be slightly better fuel economy-.3 to .4 mpg on the 330 hp Cummins. I'm telling everyone I see about them and showing them mine if the coach is anywhere nearby.

Thank you very much,

Glenn W. S.
New Braunfels, Texas

Email:Thanks for your speedy one day service. I ordered my Air Tabs on Thursday and they were here by Friday, and Installed Saturday on my 2004 Alfa See Ya motorhome. I'm attaching a photo of one side of the installation. Pretty easy to install. ...

Ira Reynolds

I originally bought the Airtab® product in the hopes of keeping the rear of my cab over camper cleaner while driving down the road. Wind typically would whip up and deposit road debris all over the rear of the camper especially when it was raining. After installing the product I have driven several thousand miles with the camper and have been in a variety of road and weather conditions. To date the difference is amazing, even after a two hour drive in cats and dog rain on freshly chipped sealed roads there is hardly any dirt accumulated at the rear of the camper.

The money I have saved in car washes alone has justified the purchase.

The good news has been the additional benefit of improved mileage. I had been consistently getting 11.7 mpg with this setup prior to the Airtabs™ . Out the gate with the Airtabs™ installed on a 1600 mile trip I averaged 12.5mpg! That has proven to be the case since driving 60mph, a .8mpg improvement.

One other noticeable difference has been an improved handling of the vehicle (very high profile) in windyconditions and improved handling when semi trucks pass.

I am pleased with the product and thus am willing to endorse their use as a 'must have' on any RV.

Sincerely,

Tim E.
Bozeman, MT

Received February 20, 2006

Jack,

I have had 2 different RV Trailers and put the Airtabs on both. The first was a bumper pull trailer and was a toyhauler. These trailers have a very square rear-end and flat. On the TT, I noticed it was pretty easy to pull, the rear door is clean and stability was wonderful.

My Current Rv Trailer (see pics) is again a Toy-hauler but is a 5th wheel with the fiberglass siding for the Airtabs to stick very well. With the other trailer, it had aluminum ripple siding so I had to attach an aluminum strip for the Airtabs to stick on....

On the 5th wheel, I noticed a big improvement on stability, My combined weight of this unit is 23 K and I averaged 10 MPG......On a dirt road even at low speeds, I noticed the rear of the trailer was relatively clean so I know the suction action is canceled out....

Here are the pics as well as some of the whole unit.

Eric B.
Salt Lake City, UT

SYF 73074

Light Truck Engineering
Light Truck Motorsports
Ford Motor Company- Retire

October 5, 2006

Hi Jack

The Airtabs surely have a dual function on the gently radiused tail of the egg-shaped Casita trailer. In addition to their familiar role with abruptly truncated bluff bodies, the Airtabs almost certainly pull the airflow farther around the large bend radius at the rear of the Casita (which is shaped much like an Airstream trailer). I estimate this to be about 10 degrees greater turn angle than the standard baseline 10 degrees before the flow separates. In other words, I'm now benefiting from a 20 degree turn angle of the flow off the roof and sides rather than only 10 degrees. This results in a smaller wake with less cross-sectional area. It is as if the trailer had less frontal area than any other Casita. My best previous fuel mileage for 1,000 miles was 19 mpg. With Airtabs, it improved to a hair over 20 mpg. Roughly 5 percent better mileage on same route and weather conditions. (1,000 miles is the longest distance I could drive on the Interstate without being forced to purchase 10% gasohol which degrades fuel mileage by about 3 mpg!)

Stability was excellent, but it was fine before Airtabs due to the good original aerodynamic shape and vehicle proportions (small rear overhang so the aero center-of-pressure in side winds is very close to the trailer's center of gravity ) .

Naturally, when the airflow is turned through a greater turn angle, it carries any clouds of water spray with it. In rainy weather, the road spray from the tow vehicle and trailer tires is now pulled 20 degrees toward the centerline of the trailer's wake, leaving a totally clear view aft in the rear view mirrors. The clarity of the view is remarkable ! Nearly the same as in dry weather.

After our 6,000 mile trip around the country, the rear face of the Casita was unquestionably far cleaner than normal. Barely needed to be lightly washed. Other RV'ers were surprised to hear we hadn't washed it once.

Cheers,

Gary

Washington State

Both my previous 05 and current 06 would have a wind noise coming through the drivers side window when crusing speed was obtained. A while back one of the forum members mentioned he had placed airtabs on the outside ahead of the driver's mirror. This eliminated most of the protruding sound. Being an airtab distributor (by a few weeks) I naturally had to try it. It worked.

Now for the reasons. The air flow passing the mirror becomes a turbulating airflow as it passses between the mirror mounting and stem and the coach side. Sort of a venturi effect. Airtabs are tiny vortex generators which, when placed ahead of the drivers mirror, will align this turbulating air flow thus removing much of the offensive air noise.

So far, everyone who has purchased the airtabs for this purpose has been very satisfied with the noise reduction. The attendees had a great discussion about this at the Tucson rally last week. I hope this has answered your question. Also, I have posted in the Photo's section a few pictures of the airtab placements: at the back and at the mirror location. Any more questions just send them my way.

Ron Dierlam

06SYG3838