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Hi Bob, glad you had a nicer flight and got to enjoy it.
My challenge was the oil cooler as well. I originally had it installed approx 10-11inches from the firewall mounted parallel to the firewall. I ended up with a 5" dia duct feeding the oil cooler plenum and it was still marginal anytime the OAT got above 87F. I finally ended up moving it up under the spinner with a 2 1/2" x 10" (25 sq inch opening) and my oil temp dropped 25-30F. That also caused my coolant temps to decrease.
So far, it appears the under the spinner for a tractor works in every case. A number of RV types have used it including myself, Jim Mosur, Bill Eslick, Ian (Aussie), and others and it appears to do the job. Don't know how viable such a mod would be for your installation.
Ed
----- Original Message ----- From: "Bob White" <rlwhite@comcast.net>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Sent: Tuesday, January 09, 2007 9:38 PM
Subject: [FlyRotary] Re: Great day to fly
Hi John,
I have two evap cores attached to the motor mount plate and angled back
about 60 degrees. The first photo shows one radiator installed and
the second show the plumbing between the two. The water cooling sort
of works, but my real problem is the oil cooling. The back side of the
oil cooler is about 5 inches from the MM plate. The top of the cooler
is just below the starter. There just isn't enough room to let the air
flow thru it.
The other nightmare I've had with this setup is - what if something
shorted the starter cable to the oil cooler? Sparks and 80 psi oil
spewing out would make one hell of a fireball. (I have a vivid
imagination.)
I'm going to get some time in the air while the weather is cool, and
redo the cooling system this spring.
Bob W.
On Tue, 9 Jan 2007 20:20:12 -0500
"John Downing" <downing.j@sbcglobal.net> wrote:
Bob; What is the set up on your radiators. I'm working on my installation and planning on the round holes within one inch of the prop and with diffusers. Hole diameter is planned at 4 3/4"s. I have the 2 1/2" x 10" opening with diffuser like Ed has for the oil cooler. JohnD
-- N93BD - Rotary Powered BD-4 - http://www.bob-white.com
First Flight: 11/23/2006 7:50AM - 1.7 Hours Total Time
Cables for your rotary installation - http://www.roblinphoto.com/shop/
--------------------------------------------------------------------------------
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Homepage: http://www.flyrotary.com/
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