I've never pulled a trailer with side skirts and truthfully can't see how this is beneficial. In a headwind or tailwind yes I'm sure it is but.....how can this do anything but destroy your fuel mileage in a crosswind? The people that came up with this garbage, California, must be thinking that head and tail winds are the only thing we drive in. Please correct me if I'm wrong but I just can't see an overall benefit with these.
You would be correct, in a head wind there is a small gain to be had with skirts. I pulled refeer for a company and did the same loads all the time, in cross winds with trailers with skirts I always got worse fuel mileage than with trailers without skirts. Some no-mind at CARB thought these things would save the planet, what a waste.
4wheelers believe they will prevent a car from going underneath a trailer. Prepare for lawsuits from the families of morons.
And its going to be the NEW sissy look for trailers in North America , I just cringe when I see a reefer / dryvan with the SKIRTS and that fold out tail sail thingy , but thats the future look.
It doesn't seem like it would be very beneficial for certain loads, like I'm hauling half a dump truck bed. The way it sits on my trailer it's just a drag in the wind. Averaging 5.7mpg with it right now. So far I've seen 6.4mpg with other loads, this one is just a drag...
I know one place that would. They put huge gouges in hubbys aluminum trailer the first time they loaded it.
Western Distributing (blue trucks from Denver). Uses polished aluminum Taylor roof wings under their reefers. Its CARB compliant and looks pretty cool. They put them upside down just in front of the running gear. That would probably be a better option than a side skirt on a flatbed.