Hello, What shape has the lowest drag coefficient at ground level and at subsonic speeds (0-150kph) with the following dimensions? Width 60cm (at 45%) Height 120cm (at 45%) Length 220cm These dimensions will fit my motorcycle (not too narrow and not too long). I am thinking it would be a symmetrical airfoil with a truncated tail but I do not know for sure. That is why I am asking. The shape will have 10-20cm ground clearance. Thank you for your time, this stuff is way over my head.