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EMB 145/135  
User currently offlineCOexpress From United States of America, joined May 2001, 32 posts, RR: 0
Posted (11 years 9 months 2 weeks 6 days 7 hours ago) and read 1977 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, 1652 posts, RR: 2
Reply 1, posted (11 years 9 months 2 weeks 6 days 5 hours ago) and read 1956 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.



My Country can beat up your Country....
User currently offlineCdfmxtech From United States of America, joined Jul 2000, 1341 posts, RR: 26
Reply 2, posted (11 years 9 months 2 weeks 6 days 2 hours ago) and read 1915 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 (11 years 9 months 2 weeks 5 days 12 hours ago) and read 1865 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
TYS


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