No, I know that, I just tacked it on the thread for the
benefit of the others. I think most pilots and many
mechanics don't really understand these things, judging by
the number of twins that feather before the prop lever gets
to the gate.

If I win the lottery, odds 146 million to one, we can have
that CFI round table and sell tickets to anyone without a
CFI. CFIs can come for free. I'll pay for you and me. If I
don't win the lottery, it will have to be in Wichita, can't
afford to go elsewhere without the lottery. ;-)'

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

--
The people think the Constitution protects their rights;
But government sees it as an obstacle to be overcome.
some support
http://www.usdoj.gov/olc/secondamendment2.htm
See http://www.fija.org/ more about your rights and duties.


"Dudley Henriques" wrote in
message
nk.net...
| If all this was meant for me, I'm pretty sure I just
might already know
| these things
| :-)
| Dudley Henriques
|
| "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]. If the prop control
is
| not rigged properly the prop will feather too soon.
Then
| the prop feather check should be done.
|
| Most props have a certain amount of internal leakage to
keep
| warm oil circulating in the prop hub, but several cycles
on
| a cold engine/prop will assure that the prop does reach
| proper operating temperatures.
|
| In very cold temperatures, I like to vary the rpm every
some
| often to be sure the prop is functioning, but normal
| internal flow should make this mostly an unneeded habit.
|
| Remember, on a single-engine reducing rpm send oil to
the
| prop and on a multi, reducing rpm/feathering drain oil
from
| the prop.
|
|
| --
| James H. Macklin
| ATP,CFI,A&P
|
| --
| The people think the Constitution protects their rights;
| But government sees it as an obstacle to be overcome.
| some support
| http://www.usdoj.gov/olc/secondamendment2.htm
| See http://www.fija.org/ more about your rights and
duties.
|
|
| "Dudley Henriques" wrote in
| message
|
ink.net...
| |
| | "Frode Berg" wrote in message
| | ...
| | Hi!
| |
| | I was told by my mechanic to only pull the prop
handle
| until I could
| | audibly
| | hear a slight pitch change to establish that it was
| working.
| |
| | However, the aircraft manual says it should be
cycled
| completely, and on a
| | cold engine three times to make sure oil is applied
to
| the governor, or
| | the
| | pitch mechanism.
| |
| | Can someone elaborate on this?
| |
| | What is recommended?
| |
| | Thanks,
| |
| | Frode
| |
| | POH rules of course, but aside from that, I always
liked
| to exercise a prop
| | through several cycles, especially when cold, just to
get
| everything nice
| | and warm and fluid up there.
| | Dudley Henriques
| |
| |
|
|
|
|