[j-c-c]

Originally Posted by freebeard

It seems the trade-off would be between aerodynamic efficiency and visual distortion. Compound vs simple curvature. Curve vs refractive index.

i don't see ( pun intended) that minor distortion is much of a factor riding at the speeds that effect mpg greatly, being a rider normally is focusing way in front of the windshield in most cases at speed on the street with anything but a very tall windscreen.