Topper while pulling TT help MPG?
I'm curious has anyone had experience with a topper while pulling a TT? How does it effect MPG vs. no topper? I'm thinking a truck with a high topper would help make the truck/TT combo more aerodynam...
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Minimal ... Part of the issue is that it doesn't change the aerodynamic profile of the back end of the trailer, which is typically a flat vertical wall. Aerodynamically, this creates a vacuum at the back of the trailer, sucking the whole combination backwards to try to fill that vacuum. If you could put on a topper, and round off the back, you might get somewhere (think: Airstream, although even a little rounding can help).
