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From: "Ed Anderson" <eanderson@carolina.rr.com>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
References: <list-1748108@logan.com>
Subject: Re: [FlyRotary] Re: Great day to fly
Date: Tue, 9 Jan 2007 22:09:00 -0500
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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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