by Mojave Bob » Wed Oct 22, 2014 9:35 am
I am out of my area of expertise here, but I would guess that it totally depends on the tow vehicle, as well as a number of different factors. To the purist, the goal would not be to create the most aerodynamic trailer, but to create a trailer that best complements the specific aerodynamics of the specific tow vehicle. Then, to get really OCD about it, you would have to factor in what load will be in the tow vehicle, for ride height, and where you will drive, as the aerodynamic profile of the tow vehicle changes depending on wind strength and direction. And so on. On the whole, I would guess (and this is just a guess) that the trailing edge profile of the trailer is as important than the leading edge, assuming the trailer is small enough (we are talking tttnt here) to mostly hide behind the profile of the tow vehicle.