Mailing List flyrotary@lancaironline.net Message #35683
From: Russell Duffy <rusty@radrotary.com>
Subject: RE: [FlyRotary] Re: oil level was Re: Primary regulator, and motor mount pl...
Date: Sat, 24 Feb 2007 21:02:02 -0600
To: 'Rotary motors in aircraft' <flyrotary@lancaironline.net>
Message
Where are the drawings? 
 
No drawings I'm afraid.  What I did with the Kolb installation was to use a small oil/water heat exchanger.  To get greater oil capacity, I ran oil in the larger chamber that was intended for water.  The oil from the flat plate (that one had a little leaky sumplet) ran down to the top of the cooler on one side of the internal core.  The oil flowed through the fins on the internal (water) core, then the bottom of the other side of the cooler was connected to a fitting in the plate below the oil pump pickup.   
 
I never had any real airflow on the ground to find out how well the water cooled the oil, but I do know how well the water heated the oil.  The two temps were always very close together.    
 
I ran the oil level 1/4" above the baffle. Never a problem. We only used 85 PSI and 9,000 RPM back then. Running a racing oil has the advantage of additional anti foaming additives. 
 
My thought would be to do without the sumplet on this version of the flat plate, and I would still use only one drain to the cooler. I'd have to choose the location carefully, to make best all around use of the drain.  I'd like to leave maybe 1 qt of oil on top of the plate, to give me about 3.5 quarts total.  
 
BTW, did I mention that I'd be using the oil flow to turn a hydraulic pre-rotator :-)  
 
Thanks,
Rusty (trying to talk myself into a Rotax 582) 
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