"Denny" wrote

Every time he had
to add a trickle of power the free running turbine wheel would wind up
with a howl that made your hair stand up - wunnerful...

Yeah, I love that sound, too. I saw the routine a couple years ago at an
airshow. I think they do it more than needed, just to hear it. Kinda like
the Harley at the stop light. They don't need to be constantly revved,
but.... Why Not! g
--
Jim in NC