Hi Paul,

I've attached a copy pictures of the oil tank for the LOM M332A engine on my
RV-3.

LOMoiltank.jpg shows the cooling fins on the side of the oil tank.
There are 18 fin on the side of the tank, which are 1/16" thick by 1/2" tall
by 7 3/8" long.  There is a 1/4" space between each fin.
There are vertical fins on the inside of the oil tank.  With seven quarts of
oil in the tank, the oil level does not get to the top of the outside
horizontal fins.

LOMOTAirInlet.jpg shows the original air inlet and outlet in the cowl door
along the side of the fuselage.
The outlet is 1/2" by 5 7/8".  The picture shows the original inlet of
similar size.
The inlet is now a NACA inlet; 5 7/8" across by 1 1/4" deep.  The extra air
goes inside the cowl, around the oil tank.

Jim Ayers
RV-3 N47RV LOM M332A engine Ivoprop Magnum Constant Speed prop :-)

NACA ducts usually don't work when feeding heat exchangers. Heat exchangers 
restrict the airflow too much. Perhaps these fins do not restrict it that 
much so perhaps this works. What temperature differences are you
seeing? Seems to me just the fins would not be adequate to effectively cool the
oil.

Paul Lamar
 
The AirCraft Rotary Engine NewsLetter.              Powered by Linux.
ACRE NL web site.
http://home.earthlink.net/~rotaryeng/            http://www.linux.org