Re: enclosed trailers
There was a big discussion on yellowbullet and the consensus seemed to be that a V-nose hurt rather than helped. Frontal area matters; getting extra height in particular increases drag. My 24' is 8 1/2 ft wide but standard height and still gives noticeably more drag than the old open trailer with car, hurting mpg 1 or 1.5 more, even empty. In fact, putting a car, etc. in the trailer doesn't make much difference at all, the 3800 lb. trailer with its frontal area brings about the decrease in mpg.
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