Quote:
Originally Posted by skyking
When I turn the rig hard over the side of the trailer can touch the back of the cab when it gets to 92 degrees or so.
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That is a lot more angle than I would have guessed you would be striving for, but of course, I don't know your driving/parking conditions. I'm a motorhome guy so don't always understand the 5th wheelers.
I think that if you can achieve a partial completion of the template with roof work and a reasonable length partial boat-tail, you are going to see some worthwhile improvement.
With fuel prices at these levels, there is some healthy interest among the RV set. I'm also looking at smoothing out the top of my Newmar, and potentially adding a boattail of about 2 meters. Hucho has some data which indicates a Cd reduction of about 7.5% for long haul trailers with such a boattail.
A big design issue is going to be staying legal with the lights. There may also be legal issues with the boat-tail itself. I'm from VA and we have annual safety inspections here.