I too
am thinking about solving this problem. I have some Ideas, none of which I have
tried. I have a cabin heater and fan, a multi pass device. If I use oil in it,
instead of dumping the heat into the cabin, I can dump it overboard lowering
the oil temp. If I do water heating, I can do the same thing to lower the water
temp, however that will do little for the oil temp.
I also have a heater core in the cabin
for cabin heat; however no means for dumping heat overboard. But for
ground ops, the door can be left open. No option of plumbing oil through
the current core as I’m sure it is not designed for the high oil
pressure. If you are going to use oil for cabin heat, be sure the core is
designed for 100+ psi.
The
second thing that I thought about is a dedicated oil cooler fan which could
hinge down, seal the output part of the oil cooler duct and pull the air
through when on the ground. When in flight, the fan would be out of the way and
not be in the airstream. It would thus not wild mill when flying.
Good idea; but sounds a bit complex to
implement. But, hey; we do what we gotta do.