Do wind vent holes in banners make a difference? We used a wind tunnel to find out
- Written by The Conversation Contributor
The next time you see a banner hung across a street or from a bridge, or hoisted as part of a street march, protest or demonstration, take a closer look. You may see that the banner has holes or slits cut into it.
But why would someone cut holes into a perfectly good banner?
These are so-called “wind vents”, and for some reason people...