On Sep 14, 2006, at 8:40 AM, Marvin Kaye wrote:

Is it that he has encountered it more with lightweight props?
Yes.
  
Walter....I can think of no correlation to the prop weight.


Walter, something to ponder. If the pilot leans until "engine roughness
is felt, then a composite prop equipped engine may be perceived to be
smoother farther into the leaning process. The engine is then so lean it
lean misfires and the expelled charge is ignited by the turbo heat.  If
the leaning is done to the same degrees lean of peak, then I also can
not think of a correlation to the prop weight or material.

Craig Berland