## Those little tab things on the side of jet engines

From: andrew cooke <andrew@...>

Date: Fri, 24 May 2013 20:25:10 -0400

Maybe you've not noticed, but turbofans have a little winglet thing on the
side nearest the fuselage.  Here's a picture:

http://farm6.staticflickr.com/5165/5299645391_afdc8004a4.jpg

It turns out that these things are called "nacelle strakes" (and "jet engines"
are turbofans).  They're needed because at low speeds and high angles of
attack the engine gets in the way of the airflow over the wing.  These make a
vortex that helps keep the air "stuck" and avoids stalling.

Andrew