Thanks Morno, tripped up by wording it seems. So just minimum rpm and 12" is what they're saying.
MakeItHappenCaptain - nothing personal taken, not about to go and try something in the air that I had questions about on the ground! You can't run a piston engine in feather hence my post.
I've only ever had the instructor set 12" regardless of the rpm of the 'failed' engine. technically not correct it seems - the Cessna 337 POH also has specific simulated feather RPMs for front or rear engine that is reached by pushing pitch to full fine the adjusting MP to get the specified RPM, also dependent on altitude and temperature. The aerodynamic / mechanical reasons for the variations front to rear go waaay over my head but if someone knows feel free to elucidate here.
Last edited by Lumps; 24th Sep 2012 at 11:21.
Reason: repeated myself