[aerohead]

Originally Posted by jimepting

There's a good thread on boat tails here:

Big Rig Boat-tail Can Cut Fuel Consumption By 2 Percent - CleanMPG Forums

It's a different site, but heck - I read and learn from both sites

There is one boat tail configuration which claims 7.5% improvement. In light of some automotive boat tail experiments discussed here I think the number is reasonable.

Jim E.

I don't know how to link it,but @ GOOGLE IMAGES at the search word above,on page- 3 is a photo of their boat tail that they've been running for years now