Nathan Young wrote:
: I have a '71 PA28-180, with a fixed 60" pitch Sensenich prop. This is
: the standard cruise prop for a PA28-180.

: The POH indicates that 2700 RPM should only be able to be achieved
: through 7000ft DA.

: I am able to hit redline (2700 RPM) in level flight up to 11500 feet
: density altitude. POH indicates that it should achieve about 2550.

Back when I had my Cherokee 180 I was able to pull well over redline
RPM at every altitude that I checked. This was a '68, no speed mods.
I think that I checked up to and including 11500 DA but I just can't
remember (and a test flight is out of the question!).
--
Aaron C.