Slowmover wrote:
It's the lack of raduised edges all around. A 30% reduction in aero drag results per NASA. Ground clearance too high is the other. Why big truck trailers now sport skirting.
A 50% reduction in FE is worth investigation. That's terrible.
And yet when we go over to the Airstream travel trailer forum we see the members there reporting pretty much the same fuel economy as the guys here that are pulling square boxes. So the rounded ends and walls of the Airstream seems to do little in the real world to help gas mileage.
Bottom line is is you have to worry over a few mpg one way or the other, then RV'ing probably is not something you want to do.