5/22/16 I have been using a Hartzell 81" prop for the last six years. Since I instruct in other Maules I have
noticed the Hartzell is lacking in performance when compared to the McCauley 81" and 80" three blade props. In
my research I ended up contacting Flight Resource about MT propellers. In short I was able to obtain a Field
Approval for an 83" MT prop. It does have better take off thrust and climb performance and is smooth running.
That being said it would have been lots cheaper and logical to have overhauled my Hartzell and I could have lived
with the slightly less performance. But in airplane ownership logic is seldom a major factor. If you have a project
and no prop or had damaged a prop beyond repair I would certainly consider an MT.