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XDotNet, I have a pathfinder and a R-pod 171 and I'm in your boat. I want to drastically improve the Cd of this rig. I followed your lead and have done extensive modeling in Flow Illustrator. Right now I'm finding that the higher pressure air under the rig is forcing the lower pressure air on the topside from following the structure. I'm thinking that an airdam under the RV would stop that. I'm also actually going to add a roof rack, bacause all the modeling is showing that I need a boost to get the air passing over the RV.
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