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On Mon, 2005-08-29 at 22:26, Jim Adney wrote: > > What I've heard is that a long taper at the rear (the fastback) leads to a long > region of turbulence where the air slipping by is trying to tear away from the > auto body. The result is a large amount of vortex shedding, which carries away > energy. While it seems totally counterintuitive, sometimes it's better to let > the air stream break away from the body "cold turkey" rather than tapering off > slowly. > > As to reality, I really don't know, but I don't see fastys going any faster > than squares with the same engine. Look at one of the suttle styling elements of the fasty. The little kick above the rear window. VW didn't spend the extra money for the tooling for that, because it is cute. I think it breaks some of the turbulance over the back. -- Russ Wolfe '71 FB AT '66 FB MT '64 T34 (not running) '65 T1 (not running) '05 KIA Sorento SUV russw@classicvw.org http://www.classicvw.org ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ List info at http://www.vwtype3.org/list | mailto:gregm@vwtype3.org ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~