Quote:
Originally Posted by wyatt
I remember reading that as long as the extension is not increasing cargo volume, that on semis and the like, a 4' extension is allowed for aerodynamic pruposes. I have seen a number of extensions on semis that are more than 18" in length, and reports say that the 4' versions are good for about 7% FE increase.  |
I wasn't sure about the length, but I'm glad they allow 4 feet, that's more like it.