Quote:
Originally Posted by Cd
So apparently, the drag was actually better on a rear window angle of 18* versus 12* ? ( .270 versus . 275 )
( From the Charger Daytona on the second image section )
Is that due to being just outside the template ?
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Yes,for only the Daytona Charger we know that the drag minimum was achieved with a backlight angle of 18-degrees.
Chrysler referred to a 12-degree slope as a 'fastback,' but it includes zero curvature,is not incorporated into the cars body,and would cause an 'overshoot' jet,with the downwash actually interfering with the pressure recovery of the ideal contour,degrading the drag.
These notchbacks have the most complex flow of all body types.They do provide nice rear vision,they're lighter,and the trunks are easy to use,hence their popularity in everyday driving.
In Kamm's last official assignment for the Battelle Institute,he discarded the Audi's notchback,and went directly for his Fachsenfeld/Kamm signature K-form roof.
For lower drag,you'd just provide the elongation which Hucho has been pushing since the early 80s.