On Monday, March 21, 2016 at 12:27:00 AM UTC-4, Andy Blackburn wrote:
On Sunday, March 20, 2016 at 8:24:39 PM UTC-7, DaleKramer wrote:
Interesting, could they make it like a down flap shape if they blew harder?

There's a joke in there somewhere...

Actually I am just speculating that, depending on the blowhole angle on the lower 'TE', they might be able to affect the camber of the airfoil if the blew harder, or would that just mess up the 'phantom' airfoil profile.