Hi Al;

May I refer you to an article written by John Deakin. John has written an
excellent explanation for exactly what you are asking about here.

http://www.avweb.com/news/columns/182082-1.html

All the best,
Dudley

"Al" wrote in message
...
Jim & Dudley, I've a question I've been meaning to ask.


"Jim Macklin" wrote in message
news:yZS2g.6789$ZW3.6526@dukeread04...
The prop governor controls within a range and should hold a
steady rpm within that range. When the run-up is done at
say, 2400 rpm the prop should be cycled to the minimum rpm
and allowed to stabilize for a few seconds to check that the
governor is working properly. On a multiengine airplane the
prop should be reduced to just outside the feather detent
and allowed to run for several seconds to be sure that the
prop isn't feathering at the minimum governed speed [usually
2000 rpm on most piston engines].

What is the minimum governed speed on a constant speed prop?

It has been my experience that below 1200-1400 rpm someplace, a C/s
prop will no longer cycle. In a glide, the RPM is generally below that.
In another thread, some time ago, you(Jim) mentioned that to get the best
glide out of a single engine(without the engine), one should pull the prop
control out fully. I have tried this in a Mooney 201, and could not make
the RPM change a bit, (Power off, best glide).

Have any of you ever been able in influence a glide with the prop
control?

Al