I noticed on a King Air 350 recently, that around both exhaust stacks on both engines, had some sort of "devices." These appear to be some kind of aftermarket retrofit, consisting of "strakes"...I assume some kind of vortex generators. I've never seen this on any other PT6A powered aircraft. What are the purpose of these exhaust devices? Some kind of performance enhancement?
I was able to trace the tail number and found some pictures of the aircraft online. I cropped out the right side engine to show these devices here:
|Strange devices on PT6A exhaust stacks|
[Edited 2012-07-24 05:20:49]