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From: "Ed Anderson" <eanderson@carolina.rr.com>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
References: <list-2105599@logan.com>
Subject: Re: [FlyRotary] RV-7A cooling
Date: Sat, 16 Jun 2007 08:50:00 -0400
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Oil temp is a bit higher than I would like.  Its not clear to me whether 
these temps are during or right after the climb or during cruise.  I presume 
they are a result of climb conditions and that cruise temps are lesser? 
Your coolant temps sound fine to me under those conditions if that's the 
temp during climb - if during cruise then I think its a bit high.

Did you by any chance attempt to divide your plenum vertically to provide 
more air for the oil cooler?

Ed


----- Original Message ----- 
From: "Dennis Haverlah" <clouduster@austin.rr.com>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Sent: Friday, June 15, 2007 11:35 PM
Subject: [FlyRotary] RV-7A cooling


> 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.
>
> --
> Homepage:  http://www.flyrotary.com/
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