Hi,
I've been do a little work on the drawings for my CarBEN EV concept:
The seats are intended to be stretched mesh over frames, so they will be as thin as possible, and breathable for good cooling. The arrangement of the seats are still not settled (nothing really is!) -- the idea is to have the driver sit in the center and to have everybody enter through the rear hatch (which includes much of the rear fascia). The battery pack I've drawing is 6" thick and is 4 feet square (8 cu. ft).
The angles are from the highest and lowest points to the trailing edge, and then tangent from the trailing edges.
The frontal area is 25.543 sq ft (see the 1 foot grid on the front view in the drawing) -- and
IF the Cd is 0.10 (higher than the blue clay model of the Boxfish concept it is based on) -- then the
CdA = 2.5543 sq ft! Wow, if I can pull that off...