COexpress
Topic Author
Posts: 31
Joined: Wed May 30, 2001 12:51 pm

EMB 145/135

Fri Mar 07, 2003 9:24 pm

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?
 
Sinlock
Posts: 1631
Joined: Fri Dec 22, 2000 12:55 am

RE: EMB 145/135

Fri Mar 07, 2003 10:49 pm

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.
 
cdfmxtech
Posts: 1319
Joined: Wed Jul 05, 2000 11:37 am

RE: EMB 145/135

Sat Mar 08, 2003 1:55 am

The fins are also there for OJI purposes for ground workers. Big grin
 
erj-145mech
Posts: 305
Joined: Tue Oct 02, 2001 4:21 am

RE: EMB 145/135

Sat Mar 08, 2003 4:15 pm

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
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