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EMB 145/135  
User currently offlineCOexpress From United States of America, joined May 2001, 32 posts, RR: 0
Posted (13 years 2 months 3 weeks 1 day 15 hours ago) and read 2813 times:

I noticed that on the EMB 145/135 there are 3-4 small yellow fins on the underside of the outboard portion of the wing. Exactly what aerodynamic purpose do they serve?

3 replies: All unread, jump to last
User currently offlineSinlock From United States of America, joined Dec 2000, 1692 posts, RR: 2
Reply 1, posted (13 years 2 months 3 weeks 1 day 14 hours ago) and read 2792 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.

User currently offlineCdfmxtech From United States of America, joined Jul 2000, 1341 posts, RR: 24
Reply 2, posted (13 years 2 months 3 weeks 1 day 11 hours ago) and read 2751 times:

The fins are also there for OJI purposes for ground workers. Big grin

User currently offlineErj-145mech From United States of America, joined Oct 2001, 306 posts, RR: 1
Reply 3, posted (13 years 2 months 3 weeks 21 hours ago) and read 2701 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.

Dave, QC Inspector
Continental Express

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