PaulH wrote:

I did the conversion on my Arrow and had the same problem. I had it
dynamically balanced and rotated 180 and it is now very smooth. There
should be a placard to avoid continuous operation at low power
settings within a certain range - can't remember the numbers, since
it's not a range I normally use for any length of time.

That's encouraging to hear as we're considering a dynamic balance. The
prop was already rotated 180 and that made some difference, but not
much. No RPM prohibition was mentioned, but that may have been an
oversight.


Be careful of power off approaches with prop in high pitch. Those 3
blades form a very effective speed brake in idle mode. It's useful to
do a crowbar approach while staying above jet vortices but requires
some practice.

Yes, we learned this very quickly. At less than 1600 RPM the airplane
drops like a rock.


Matt