Message-Id: <5.1.0.14.2.20031119120626.0300ef90@pop.grc.nasa.gov>
Date: Wed, 19 Nov 2003 12:16:45 -0500
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>,
	"Rotary motors in aircraft" <flyrotary@lancaironline.net>
From: Joseph Berki <joseph.berki@grc.nasa.gov>
Subject: Re: [FlyRotary] Re: radiator size
In-Reply-To: <list-2751619@logan.com>
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I would like to know what the optimum volume is.  It is interesting to note 
that Tracy is using two cores and had a duct problem with one and had 
sufficient cooling.  See cooling test at his web site. I think he changed 
the inlet and improved the cooling.  The type of AC fast vs slow is 
important (high power at low speed)  like climb out .  If we optimize the 
inlet how small could the rad be?  I think a pusher would be a perfect bed 
for a long duct.  Worse case would be ground cooling.


At 11:01 AM 11/19/2003 -0600, David Carter wrote:
>408 cubic inches is short of the 600 to 750 that are being used
>successfully.  I posted my a/c core sizes yesterday - 336.65 cubic inches of
>fin area X 2 = 673 cub inches - that will be enough.
>
>David Carter
>
>----- Original Message -----
>From: "sqpilot@earthlink" <sqpilot@earthlink.net>
>To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
>Sent: Wednesday, November 19, 2003 10:55 AM
>Subject: [FlyRotary] radiator
>
>
>Hi, fellow rotary enthusiasts.....I'm getting ready to order a radiator for
>my 13b powered SQ2000 canard pusher.  I talked to Al Wick, and he has a 160
>hp Subaru powered Cozy and is cooling it very well with a radiator that is
>17" x 7.25" x 3" deep.  Any idea if that size might also cool a rotary?  How
>does that seem to compare with two GM evaporator cores?  I was told that if
>I can increase the height to 8 inches instead of 7.25, they can put two fans
>on it, as well as the built-in Meziere EWP. I can work with the additional
>height of 8 inches.  Just don't want to spend $1100.00 for too small a
>radiator. If 17x8x3 equates to approximately the same size as two evaporator
>cores like Ed Anderson is using, I should be OK. If anyone can compare the
>square inches of the two, I would sure appreciate it.  Thanks in advance for
>any and all efforts and recommendations.  Paul Conner
>
>
>
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