Sender: <marv@lancaironline.net> (Marvin Kaye)
To: flyrotary
Date: Wed, 19 Mar 2003 20:47:02 -0500
Message-ID: <redirect-2080621@logan.com>
From: Mike Wills <willsm@spawar.navy.mil>
Subject: Re: [FlyRotary] Oil cooler in the radiator?
In-Reply-To: <list-2080415@logan.com>
Mime-Version: 1.0
Content-Type: text/plain; charset="us-ascii"; format=flowed

At 05:17 PM 3/19/2003 -0500, you wrote:
>
>My current question, is about oil/water heat exchangers.
>
>Do you think this could work, or am I one wacky idea away from being voted 
>out of the group :-)
>
>Rusty

Rusty,

  I dont know of anyone who has tried using an in-rad exchanger. I found 
the idea very appealing but rejected it because I doubted it would work 
after talking to several folks using stans alone oil-water exchangers 
(unsuccessfully). The in-rad exchangers are physically much smaller 
than  the external exchangers that have been tested that I'm aware of so I 
have my doubts. Fluidyne wanted $1000 for a rad with an exchanger built in 
so it sounded like a potentially very expensive mistake.

  Neil Kruswyk (?) tried the largest Setrab oil-water exchanger a few years 
back and was unsuccessful. May have been due to his radiator config or the 
oil cooler, or??? One of the big issues in my mind is that it seems to me 
that if there is a cooling problem it would be very difficult to determine 
if the problem was with the oil cooling or in the coolant part of the 
equation since the two are so closely linked. Seems to me that it would be 
much easier to troubleshoot with a conventional config.

  There was a guy on Paul's list that was using an exchanger (the same one 
Neil used) on a 13B powered sand dragster. He reported oil temps stable 
at  230F and coolant stable at 205F when under load. He was satisfied with 
those numbers but it didnt sound good to me. And he was using a huge 
radiator (though I doubt he had any sort of air ducts on the inlet).

  Dont let me discourage you from trying it. I'm hoping someone makes it 
work. It would be a way for me to delete the large air scoop currently 
installed on the top of my cowl if you could make it work.

  I'd vote you out for all the crap you've given me over the past year or 
two, not over the wacky ideas.  :-)

Mike Wills