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Kammed Explorer
SUVs pose conflicting challenges for streamlining.While their huge frontal areas and large drag coefficients would benefit the most from streamlining,their relatively straight sides and roofline and full-frontal-area-wake require enormous extension of the body,with curved taper to both roofline and body sides to realize any real benefit.
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A friend has a Toyota Highlander,and we're considering a receiver-hitch,cargo-box-based boat-tail extension,to push his highway mpg from 28,to 32,which will require about 30-inches of additional length,psychologically quite a hurdle!
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I'm pretty confident that a boat-tail is one of the few things that would actually help your Explorer,you'd just have to weigh out the reality of additional length.
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