Paul,

I recently mistakenly deleted a thread about oil heat exchanger capacity
sizing that you had posted about one month or so ago.  In it Dave
remarked he was flying with a Setrab 2" by 11" X 15" ??? model and
then had 20 square inches of that taped off, but had a good dedicated
air scoop to the system.

I recently bought a second 20B oil cooler and wonder if I need to mount
both of them for a 300 hp 13B.  I plan to have dedicated air ducts and
cowl flaps of course.
The oil cooler core size (minus the end tanks)  is 120mm x500mm x 50mm
or 4.7" x 19.7 x 2"

That is 185 cubic inches.  Times two is 370 cu. in.

Doug in Japan


It will be awhile before I can access old messages.
Perhaps in a day or so. I upgraded the hard disk from 160 gig to 300 gig and the OS from Fedora 5 to Fedora 8 so I have to copy a lot of files over from the old hard disk. So far I like the improvements in Fedora 8.
There were a few glitches but nothing serious.

The 185 ci works well for a 2 rotor so two of them ought to be fine
for a 3 rotor.

Paul Lamar