MetroMPG shared that post about the Bonneville Fusion and one detail caught my attention:
Quote:
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rear decklid extension (improved roof to trailing edge angle)
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That was something that I had not understood.
So, some mirrors have aerodynamic fronts, but the backs ruin everything, despite having a sharp trailing edge. From what I understand, you want the trailing edge to be no more than ten degrees below the roof line.
What if you extend the bottom edge of the mirror to the back of the window or the door? A 4" tall mirror that extends 22.685" would form a 10° angle with the top and you might not be able to see the extension if you also taper it in 10°
Would that do any good?