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Elhigh,
Thanks, good thoughts.
Everyone,
Right now my rear windows start about 1.5” below the roof crown in the back. If I do my idea of starting taper at the back of the roof by sloping only the roof sheet metal, the metal could end up a few inches below the tops of the windows. If I don’t want to impact the windows, it seems like I can:
A: Slope the entire roof equally and have two small window “tail fins.” I don’t know how bad from a drag perspective this detail would be, and if that would be offset by enabling the additional length of the kamm back.
B: do more contouring only in the center to keep the edges above the window. This wouldn’t set up any taper for the outside of the top of the roof.
C: Not do the pre-taper on the roof, and start the idealistic taper just at the rear edges of the windows. This would shorten the effective length of the kamm.
Attached are three concept drawings of A, B, and C as well as photos of the window and rear roof. Ignore the roof rack as these are old photos it has already been removed.
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