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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
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