REFLECTOR: Arm pit scoops

[Rodney Brim]

Dave,

I found two things worked to get the temps down with arm-pit scoops.
1. Put in alumunin tabs or diverts that drive 2/3s of the incoming air
directly again # 5 and #5.  
2. Get rid of all the 90 degree bends and go to a direct updraft, you'll
still need to guide a big proportion of the air to #5 and #6.  

My engine was running very hot at the time as well, with 10to1 pistons and
pumping 235 horses out of a parrallel valve.  


Rodney Brim, Ph.D.
CEO, Performance Solutions Technology, LLC
Delivering goal>action plan>results based performance technology
www.performancesolutionstech.com 
Ph. (562) 799-1267

-----Original Message-----
From: reflector-bounces at tvbf.org [mailto:reflector-bounces at tvbf.org] On
Behalf Of Dave Dent
Sent: Saturday, September 10, 2005 6:43 PM
To: Velocity Aircraft Owners and Builders list
Subject: Re: REFLECTOR: Arm pit scoops

That was fine on the EZ's they were up draft engines.  This is a down draft
engine.  I had no problem at all with the up draft.  I had two oil coolers
as well.  One in the back of the engine and one on the side.  Oil temp is
not my issue.
----- Original Message -----
From: "Richard Riley" <richard at riley.net>
To: "Velocity Aircraft Owners and Builders list" <reflector at tvbf.org>;
<reflector at tvbf.org>
Sent: Saturday, September 10, 2005 6:28 PM
Subject: Re: REFLECTOR: Arm pit scoops


> The Berkuts 540's all have armpit scoops, and a small belly scoop.  
> Cyl head temps haven't been a problem, it's been oil temps.  Those 
> with 2 oil coolers - one in the engine compartment, one in the back 
> seat with a naca scoop - have been fine.  With one cooler in the back it's
been iffy.
>
>
>
> At 05:59 PM 9/10/05, Dave Dent wrote:
>
>>Do any of you have the arm pit scoop cooling on your XL with the IO-540? 
>>I don't want to reinvent the wheel so I am asking if any of you 
>>mastered the number five and six cylinder cooling issue that goes with 
>>this type of setup?
>>I have done fancy things like I did on the EZ's with kickers and rap 
>>around baffling but to no avail.  So could I get some input from those 
>>that have had some time on theirs that have got these cylinders down?
>>
>>I can't seem to drop it below the 435 level in flight.  Especially on 
>>number six.  So I'm leaning according to the CHT instead of EGT.  
>>Making me burn in the 14+ gpm.  These real hot days has not helped any.
>>
>><mailto:davedent at comcast.net>davedent at comcast.net
>>N32XL
>>XL/RG
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