Quote:
Originally Posted by JulianEdgar
One template occurs five times in the five different templates?
And five templates is really seven if you change them?
Neither point makes any sense.
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1) It helps to un-nest the images into their individual elevation and plan-views. I probably published all of them in 2007. Don't remember.
2) The VW-Drop Shape is full-length already, so other than lowering it ( if that actually helped), or installing wheel fairings, there's no additional drag reduction available. And if you'll examine the 'windscreen' area, it might develop the ' intolerable refraction and visibility problems' experienced with the VW 2000, at Cd 0.18. It might be impossible to see out of. It's roofline is exactly the AST-1 profile.
3) The AVA Streamline Shape Cd 0.15 is the 1938 Sch'o'rwagen, by Ludwig Prandtl. Cd 0.186 @ full-scale, and like the Drop shape, it's already at full-length, so it also has 'issues'. Good outwards visibility.
4) The VW Blunt Body Cd 0.15 ( solid bordered image ) with a truncated tail is Cd 0.15. If elongated, it's extremely likely that the long-tailed variant would be at least Cd 0.14.
5) So I would allow for a Blunt Body long tail. Their contour is essentially the AST-II. Good outwards visibility.
6) The VW Flow Body, short-tail, Cd 0.15 is also essentially the AST-II.
7) Across the page from it, you'll find it's sibling, the Flow Body long-tail, Cd 0.14. Without wheels, Cd 0.0913. AST-II. Good outward visibility.
8) The other image is Wolfgang Klemperer's 'minivan' of 1922, Cd 0.16. It's also truncated, and could develop lower drag if elongated. Hucho developed his own half-body by fully extending Klemperer's roofline, for Cd 0.15. We do not have a plan-view image of Hucho's half-body.
I'm extremely 'visually' oriented. I don't have the facility to abstract forms as presented in Hucho's nested schematic. I need to really see them individually.
I'd be tickled to see any of these forms rolling down the road.
I chose what I chose because of the Flow-Body long-tail, leaning on the 2.5:1 streamline body's lowest measured drag, to dial-in as low a drag as I knew.
I like the wing cars too. I just don't know how an automaker could fare in the marketplace with them. Same goes for the ASTs as well. And that deserves it's own dedicated thread.