Message-ID: <000a01c459f7$f8462fc0$2402a8c0@EDWARD>
From: "Ed Anderson" <eanderson@carolina.rr.com>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
References: <list-224493@logan.com>
Subject: Oil cooler air velocity was : [FlyRotary] Visit
Date: Thu, 24 Jun 2004 10:31:42 -0400
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Joe,

    While I think using the Mazda stock oil coolers is a proven way to go.
Keep in mind that the air through your cooler will not be your airspeed, it
WILL be slower  and hopefully MUCH slower.  If you have a proper diffuser to
slow down the air velocity through your cooler for lower drag and better
cooling, then your air velocity through your cooler will be approx 0.1 - 0.3
of your airspeed.  So for a 200 MPH speed you might have 20 -60 mph air
velocity through your cooler fins not 200.  Just though I would mention it.
Still think the Mazda cooler is a smart way to go.  I have not heard of
anyone ever bursting one from pressure, which can not be said for some other
coolers.
FWIW

Ed
.
Ed Anderson
RV-6A N494BW Rotary Powered
Matthews, NC
----- Original Message ----- 
From: "Joseph M Berki" <Joseph.M.Berki@grc.nasa.gov>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Sent: Thursday, June 24, 2004 9:18 AM
Subject: [FlyRotary] Visit


> Yesterday, I had the opportunity to visit Summitt Racing.  I was looking
> for an oil cooler.  The many units they had were built very similar with
> the tube basically penetrating a thin sheet of metal.  It did not appear
> that the sheet metal could withstand 200mph airflow.  They were rated by
> engine HP.     The next step is to look for a pair of third generation
> Mazda oil coolers and have them cleaned and tested.  has anyone used this
> "fintube" design oil cooler on a rotary?
>
> Joe Berki
>
>
> >>  Homepage:  http://www.flyrotary.com/
> >>  Archive:   http://lancaironline.net/lists/flyrotary/List.html
>