REFLECTOR: Cylinder repair followup

[John Dibble]

Al, that makes perfect sense and I have been thinking that all along.
Basically, the hotter the oil leaving the cooler, the more heat is being
removed.  In that sense, hotter is better.  But the fact remains that
with an OAT of 86 F, the oil leaving the cooler was 107 C, right near
red line and the oil entering the cooler must have been hotter.  I
recall flying 2 years ago with a similar OAT and seeing an oil temp
around 95 C.   I think what is happening is that I am now removing more
heat via the oil cooler, heat which otherwise would be removed via the
engine cooling air.  For sure, if the oil flow is reduced, the temp will
be lower.  I'm just struggling to decide which senario is best for
engine operation.  Seems like lower temp is better.

John

Al Gietzen wrote:

>
>
> The increased flow will reduce the delta T, the change across the
> cooler (and correspondingly in/out of the engine).  Depending on other
> factors, for the same air flow, the amount of heat removal would be
> about the same or a higher, so the average oil temp would be a bit
> lower.  However; with the heat removal air flow limited the measured
> oil temp out of the cooler could be a bit higher; while the temp in
> (out of the engine) would be lower.  Make sense?
>
> Al
>
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