Quote:
Originally Posted by 3-Wheeler
I think that in the case of the wagon shown, there is a steep and rapid transition between the windshield glass and roof top. I would think that there would be air separation there and that it could be handled by building up the roof slightly.
Take a look at the Kia Soul. This roof has an incredibly sharp transition in that same area. Then take a look at a Prius or Gen 1 Insight and see how much "smoother" this transition is.
"Flow has to be attached at the front for the tail to make any difference."
Jim.
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Hucho talks of 'saturation',and that once the radius of the leading edges will support attached flow,that there's no further drag reduction with increased softening.If the windshield/roof intersection is as rounded as the hood/grille intersection,it seems like it should be plenty,if Hucho's shooting straight with us.Both of these areas are in a favorable pressure gradient,with the oncoming flow tending to hold the boundary layer against the body.