Chuck wrote:

snips..

It works fine in cool weather. It is marginal above 90F OAT in a climb.

I

flew today 61F OAT and the max oil temp was 190F after full power

takeoff

and 100MPH climb to 7500FT. My inlet is one side of Van's nostril intake

21

sq. in. but it reduces to about 10 sq. in at the oilcooler duct due to
interference with the water pump inlet. I will modify the water pump

when I

install a new engine, then I can improve the duct. Jerry, I think you

will

be alright if your first flight is in cold weather and if you can run

full

power on the ground for 10 minutes without the oil overheating. I think

you

will find you need more than 3" duct in warm weather.

Chuck Dunlap

Here is a picture of the metal duct Chuck mentioned feeding air to the

firewall

mounted oil cooler.

Paul Lamar

Chuck,

Hope you don't mind giving some details on your installation. I was wondering
mostly about the radiator, specifically: How big is your water radiator? How
big is the air inlet, and how well does it work? I'm struggling to get all
the heat exchangers to fit under the cowl of my chosen project ;-)

Thanks,

Monty

Here is a picture of Chuck's rad taken at Copper State 2000 unless he has changed it.
I have some pictures of the opening as well but I am sure he has cleaned it up 
since then. I have to give Chuck a economic perseverance award as he got a bad gear box
from Ross and went ahead and bought a new gearbox from Tracy to replace it.
Anybody want a slightly defective Ross gear box cheap? :-)>

Paul Lamar

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