Originally Posted by Jabawocky
You sure about that? I am not saying never, but I have never seen such a thing or even heard of it...
Don't take my word for it -it's a pretty well-documented fact. A Google search should throw it up... from memory, I think Mike Busch wrote an article on it, but it's been a long time since I could muster the enthusiasm to look ;-)
In my experience, usually only on fixed-pitch aircraft. Pick a 172, any one will do, keep an eye on the EGT and you'll see it for yourself.