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Message
One thing you may want to check on (Rusty are you still
on?) is that while the Harrison GM cores can take a lot of pressure, the
pressure pulsations by such things as positive displacement oil pump could
possible fatigue the metal. While I know of no conclusive proof of this
happening, there has been more than one failure of a Harrison GM core being used
as an oil cooler.
Hi
Ed,
I'm
still around, but haven't been following the list too closely. I let the
messages pile up, then delete anything that looks like it requires a
thermodynamics degree, or debating skills
:-)
FWIW, I
had two of these cores fail when using them as oil coolers. The first
happened on the ground, and was just a small leak. That core had been
dented in shipping, so I assumed that was why it failed. The replacement
core (both were new, not salvage) worked perfectly until I made the mistake
of trying to make my first short cross country flight. On the way
back, it split at one of the tank seams, and the rest is history. I
would never consider using one of these as an oil cooler
again.
Rusty
(selling gyro, waiting for RV-12, working on single
rotor)
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