Prop pitch cycling?

Nice link. Good article.


--
James H. Macklin
ATP,CFI,A&P

"Dudley Henriques" wrote in
message
nk.net...
| 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
|
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