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Date: Sat, 16 Jun 2007 09:06:41 -0500
From: Dennis Haverlah <clouduster@austin.rr.com>
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To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Subject: Re: [FlyRotary] Re: RV-7A cooling
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Ed,

The temperatures were in cruise.  I modified my lower inlet duct to 
provide a deeper wedge under the oil cooler and a tighter wedge under 
the water cooler.   I'll post a couple of picutres today.  Is the oil 
pressure OK compared to your experience?

Dennis H.

Ed Anderson wrote:

> 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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>> http://mail.lancaironline.net:81/lists/flyrotary/List.html 
>
>
>
> -- 
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