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Subject:         Custom radiator supplier
 Date:         Wed, 30 Aug 2000 15:49:48 -0700
 From:         Paul <rotaryeng@earthlink.net>



Paul wrote:

We may have a minor rad breakthrough here. I am talking to Ron Davis
about building some rads for us. He does not know they are for aircraft
yet so don't tell him. He does know they are for rotaries.

We had good communication because  of my racing experience. He was a fan
of Chaparral as a kid back in the 60's :-)
What I will be asking for is 16 inches wide about 20 inches long
cross counter flow rad two pass rad. As per this sketch. Any comments?
any other request. I can get the price down if he feels he can sell more.

Paul Lamar

I will need one for sure, just that I have not sized my space yet. Most
likely I'll need a narrower, but longer rad ?
BTW I made a block off plate for the oil filter mount per your advise from
1/2" aluminum and came out great. Thanks.
Bulent

Don't expect too much out of these counter cross flow rads. My guess is about
10%
better than a regular rad. The big question I hope to answer on the
dyno engine is the relative restriction to water flow of the rad compared
to the engine block. A two pass rad in theory has twice the restriction
to flow but that is counter balanced somewhat by a higher velocity, more
turbulent fluid flow in the tubes.

Don't forget to feed the oil in on the top of the front housings
unless your Cosmo engine as an inlet port on the bottom of the
rear housing.

Paul Lamar

I'll take some photos tomorrow so we can see what we are talking about. I
can't remember all the ports.
Bulent

 
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