r-pod gas mileage fix

  I am a new member who has not bought a r-pod yet. Looking over everybody likes and dislikes poor gas mileage towing seems to be the big complaint. Has anybody looked into the wind deflector kits that semi trucks use. Their are  kits for mounting on the roof of a pick up or suv etc. What I have read the closest to the front of the trailer the better.In my case I have a fiberglass cap and it could be mounted to the rear of the camper cap. Has any one looked into this option. These deflectors are adjustable changing the angle for best results of air flow.
  This deflector is suppose to give about 2 mpg increase. Cost about $350

     Any input would be appreciated...thank you

I have played around with different tow vehicles and combinations of items.  i did find an increase when the kayaks were in a v shape on the top of my trail blazer.  I'm now pulling with a dodge ram 1500 and looking to put a cap on it and the kayaks above it.  Will let you know what I Find out.  I don't think an air dam will do much and also if you look at the cost versus the savings you see you will have to tow a bunch of miles before the break even point  

When I ran some airflow simulations on the R-Pod and a couple of tow vehicles (see Fall, 2010
Forum) , not only did the separation distance between the Pod and the TV make a noticeable difference but also the disruption of the airflow caused by the 'relatively' large AC on the roof!
I ran several other simulations using a different 'bread-box' profile and found more disruption
caused by the AC than using a tear-drop profile versus 'an old fashion' squared off design.
Some conclusions: the TV-RPod gap caused a noticeable disruption even when an airfoil was
installed on the TVs roof (the Pod's curved front roof increased the gap compared to a squared off front section); the R-Pod's tear-drop profile did nearly nothing increasing airflow efficiency;
the AC on the roof of the Pod made the most noticeable change in airflow (airfoils on the Pod's rear
were mainly ineffective).

  TIDALWAVE, I went back and looked at your youtube sims. I had not seen those before and what got me was the amount of air disturbance that starts at the front of the TV and flows under it all the way to the rear of the POD. I am highly impressed with ability to do that, but I have to wonder what the difference would be if you added an air dam at the front of the TV along with side skirts. It looks like that may help a lot stop some of the drag.    Goose 

The leading edge isn't nearly the problem that the trailing edge is.  Have a look at the airflow simulations I did when I bought my R-POD.  A spoiler will be far more effective than a deflector.  Look around at the aftermarket manufacturers sites and you'll see that realistically, deflectors, spoilers or other approaches may increase gas mileage by 2-10%.  This will take 10 MPG to an optimistic 11 MPG.  This means you'd save 4.5 gallons of gas on a 500 mile round trip.