On Jan 24, 11:42 am, wrote:
My club is about to acquire a 250 HP Pawnee with no muffler and a 7 ft
climb pitch prop. We are anticipating some noise issues. I have seen
Pawnees in the UK with mufflers and four bladed (Hoffmann?) props and
which were eerily quiet.

Anyone know what these mods cost, in performance and money?

Richard Kellerman

Call Mile High Gliding. Not sure if there's a 250hp pitch
http://www.milehighgliding.com/common/propposter.doc