Sinlock From United States of America, joined Dec 2000, 1679 posts, RR: 2
Reply 1, posted (12 years 4 months 3 weeks 6 days 11 hours ago) and read 2281 times:
The fins are "vortex generators".
That part of the ERJ's wing tends to "Burble" (It's like a pre-stall) when the wing is at high AoA. The Burble can cause buffeting and loss of effectiveness of the ailerons.
Erj-145mech From United States of America, joined Oct 2001, 306 posts, RR: 1
Reply 3, posted (12 years 4 months 3 weeks 5 days 18 hours ago) and read 2190 times:
Actually the yellow protusions are "vortilons", they are the leading edge of the wings. The vortex generators on the Embraers are on the upper surface of the wing, forward of the ailerons. They are painted the same color as the wing upper surface.