[wagonman76]

Yep, the chances of getting a direct tailwind are not so great, because of all the other directions the wind could be coming from.

I first learned about dealing with headwinds and tailwinds from an RV forum. They had a really nice spreadsheet to determine how much power was required to maintain a certain road speed, based on expected grades, wind speed/direction, and the frontal area/weight of your rig. Along with weight distribution calcs. Amazing how fast my 175HP van topped out with my 16 ft camper.

They always said headwinds hurt more than tailwinds can help. Which makes sense, because the power needed to deal with wind goes up exponentially with wind speed. Add a headwind and the power needed goes out of sight. Add a tailwind and the the power needed goes down but not really that much.

Metrompg, I just remembered you installed a kammback. I wonder if that kammback was helping, acting like a parachute to help the tailwind push you along.