spreader shape

[mariner2k]

Hi, I was looking around the shipyard today and some spreaders were airfoiled and some not. (wooden). The airfoiled spreaders definitely looked more professionally done and probably were. So there you have it.
On another note, I am going from a very substantial box mast to a round mast. Aside from a couple of running backstays, I think the wind resistance works well toward my favor. Sort of the difference between driving a van into the wind, or a car.
Thanks, Brion