X-Mozilla-Keys:                                                                                 
Al Gietzen wrote:

Leo Brandt brought up this subject last week in regard to his 20B
installation.  That Setrab cylindrical water-cooled oil cooler looks pretty
neat.
Leo; could you give us a bit more info on this application?
Auto? Airplane?  What kind?

It has been said here before that coolant-oil cooling is not a good idea.
However, IMHO if the cooling system is designed properly to handle
that total heat load this is an alternative.  The oil can
typically operate 20 F or so higher than the coolant, and that gives you
enough Delta T.  If the oil-to-coolant heat exchanger is on the coolant
radiator outlet leg; a very compact, lightweight HE can provide sufficient
cooling.

Keep in mind, however; that the area of coolant radiator needed to handle
the heat rejected from the oil is slightly more than the area of an
air-cooled oil cooler (lower rejection temperature).  And there is some loss
in redundancy; loss of coolant flow also loses oil cooling; which may not
make much difference; you're landing regardless.

Al Gietzen

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