First and foremost, which size wire mesh would you be looking at? Are you talking about something fine, like lets say 80 x 80 mesh? Or something with more of a wide opening like a 4 x 4 wire mesh? (Difference can be found here:
Custom Wire Cloth - Belleville Wire Cloth Co - Cedar Grove, NJ )
The fine wire mesh would probably restrict air flow too much. This would cut down on air flow almost near the 50% range and for obvious reason that will not work. The larger wire mesh with bigger openings presents different problems, the main one being a bird sticking to the mesh and staying there for an entire flight. I don't see this working, but there may possibly be a way to angle the mesh and get this done?