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Blu3Z3rg, see if you can get a copy of Hucho's book. If not for purchase maybe borrow from your local branch via inter library program. That's what I did last year. The section on trailers compiles data from others and connects some dots. For example, the effect of nose slope on sway is covered; think face pressure and tongue weight. Of course Cd reduction and hence MPG gain. From the wind tunnel pix a big win came from taming bow wave splash from trailer with too blunt a leading edge. There is also some data showing effect of edge radii including rear not just front. Roof deflector too. It will be time well spent I'm sure if you can get a copy. Good luck!
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