Message-ID: <3FBBE054.B4CC14F8@frontiernet.net>
Date: Wed, 19 Nov 2003 15:27:48 -0600
From: Jim Sower <canarder@frontiernet.net>
MIME-Version: 1.0
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Subject: Re: [FlyRotary] Re: radiator size
References: <list-2751640@logan.com>
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Isn't the conventional wisdom 3 cuin/hp?  Al Wick's Subaru is about 2.5 but his
Soob doesn't have the cooling requirements of a rotary and I believe he has a
really nice (efficient - good recovery) plenum.  I would think 3 minimum unless
you have really good ducting and plenum.
Just a theory ... Jim S.

Joseph Berki wrote:

> 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
> >
> >
> >
> > >>  Homepage:  http://www.flyrotary.com/
> > >>  Archive:   http://lancaironline.net/lists/flyrotary/List.html
>
> >>  Homepage:  http://www.flyrotary.com/
> >>  Archive:   http://lancaironline.net/lists/flyrotary/List.html

--
Jim Sower
Crossville, TN; Chapter 5
Long-EZ N83RT, Velocity N4095T