at high speed, i noticed that wind noise (=inefficiency) is
significantly less when the wipers are 90 degrees, furthest from their
parked position.  this means the noise is from wind hitting the
broadside of the wiper, since the wiper projects from the car too far
beyond the rim of the hood.

are their any aftermarket wipers that sit closer to the car than the
originals?

any "outside the box" suggestions to drop the noise?

-bryan