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Subject:Re: Hot Oil Fallacy?
From:Eugene Kearns
Date:Sat Jun 09 10:01:57 2001
David,

The fallacy would be that you could *eliminate* water from
your engine. There is nothing (practical) you can do to prevent your
engine from breathing water vapor. Flying frequently and long enough
to steam the collected water overboard is the best you can hope to do,
but it wont eliminate all water from the oil all of the time.

On Sat, 9 Jun 2001 08:43:57 -0700, "Marry Daniel or David Grah"
wrote:

>Something has been bothering me. I have been pretty well indoctrinated into
>the importance of periodically getting the oil good and warm every time I
>fly. Something about boiling off the water and other volatiles. I hear a
>whole lot about the evils of water and the corrosion it causes if left there
>in the motor. Since where I live a day of 20% humidity is pretty wet, I
>would guess water in my motor would come as a byproduct of combustion.
>
>My plane has no problem warming up the oil because the oil always gets very
>warm in a climb. But, on decent, the oil gets pretty cool too. This is
>what bothers me. Every flight, before I land, before shut down, the oil
>gets cooled. I havent calibrated my gage to know, but Id guess it cools
>below the magic "warm your oil to above XX" temperature on every flight and
>before shut down. So, conceivably at the end of every flight water
>condenses into my oil.
>
>Given this, what good does it do to make sure I warm my oil on each flight?
>Only to keep water from accumulating in the oil?
>
>
>David Grah
>Bishop, California
>Cessna 170A
>Continental 0-300A
>



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