Dear tech educated friends,
I have a naive question for you:
While waiting for my plane to takeoff I observed a corporate jet, I think a legacy (I may be wrong about the type), that was ahead of us lining up for departure and was venting some steam/smoke from the side of the engines (see video, sorry for vertical + poor quality but if you look carefully you can see it). It was a hot July day but i'm not aware what this feature is, let alone knowing if temperature is a factor. Can somebody educate me?
http://youtu.be/fg5XAjTzTw4