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Date: Fri, 15 Jun 2007 22:35:26 -0500
From: Dennis Haverlah <clouduster@austin.rr.com>
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To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Subject: RV-7A cooling
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I've made more progress toward good cooling but have a long way to go. 
At an OAT of 92 F I was able to climb to 5500 feet and cruse at 23 
inches MP.  Water was 195 F and Oil went up to 209 - 210 F.
Oil pressure was 60 psi.  I noticed my oil pressure went down to about 
58 psi as the oil pressure approached 210.  This was after about 20 
minutes of flight.  Is this an indication of oil foaming?  Also, is this 
too low oil pressure at 5500 rpm?

Now for the question:  I want to measure (in flight) air pressure to 
determine if my outlet is maybe too small.  Any suggestions as to what I 
should be measuring?  Static pressure near the outlet in the cowl vs.  
ambient static pressure ? That is my first guess.  Any other ideas??

Thanks,

Dennis H.

PS - Pictures of my newest inlet design coming soon.