Mailing List flyrotary@lancaironline.net Message #39407
From: David Staten <Dastaten@earthlink.net>
Subject: Re: [FlyRotary] Re: How cool is too cool?
Date: Fri, 14 Sep 2007 15:31:00 -0500
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
John Slade wrote:

>>I'd heard oil needs to see 212f minimum at some point so that it can boil off moisture that develops.
>Actually, at 6000 feet, where a lot of folks fly, the boiling point drops
>to 201F.  At 10K feet, it is only 192. Perhaps thats true at ambient pressure, but surely - not at 80 PSI. :)
John


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But John. the oil is not at 80 psi all the time.. as a matter of fact, its at ambient pressure when sitting in your oil pan, before getting picked up and pumped... and after it drains from the components being lubricated.

So we do not need to adjust the oil temp to account for the boiling point of water at whatever elevated PSI your oil pump puts out.

Dave
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