Sender: <marv@lancaironline.net> (Marvin Kaye)
To: flyrotary
Date: Wed, 19 Mar 2003 13:20:35 -0500
Message-ID: <redirect-2080203@logan.com>
Reply-To: <13brv3@mchsi.com>
From: <13brv3@mchsi.com>
Subject: Re: weird cooling ideas, part 2
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Now, unfortunately, OpenOffice will not read the doc file that Rusty =
sent,
so=20
I do no know how he tested.  The air volume would be very important for =
the=20
comparison.  Rusty, would you mind posting the data you have in rtf =
format.
---------


Ernest,

The test doc info is listed below. Since I couldn't think of a way to =
make a
fair airflow comparison, I decided to use the water in my pool instead.
That may not have been fair either.  I wish I had paid more attention in
thermo about 20 years ago :-)=20

I might continue to play with the flat rad idea, but I just didn't want =
to
spend the time doing it now. The goal is to get in the air, then spend =
the
next few years tinkering.  I sold a great RV-8 last year, mostly because
there just wasn't anything left to do but fly it.  I'm not expecting =
that
"problem" with the RV-3 :-)

Rusty


Radiator test doc:=20


6-16-02

Tested Ed=92s radiator, and my first attempt at a flat rad.  The test =
setup
was as follows, hot water was run from the sink faucet, through a garden
hose, to a =BD=94 ID tube, through the rad.  The rad was submerged in =
the pool,
about 5 feet from the outlet near the steps.  There is a thermocouple in =
the
=BD=94 ID tube going into the rad, and out of the rad. =20

Ed=92s Rad
=20
Overall dimensions- 13.5=94 x 9=94 x 3-5/8=94 =20
Core dimensions-  10.5=94 x 9=94 x 3-5/8=94
Volume of water it will hold- 39 oz.
Inlet size- AN16 fitting, or 1=94 ID

Held still about 5 ft from the outlet
Water temp in- 142 F
Water temp out- 104 F
Pool water temp- 89 F=20

Moving the rad vigorously for more flow
Water temp out- 101 F


Test Rad #1

Single layer (1=94 borders, =BD=94 dividers- 4 each @ 20.25=94 long)
Dimension- 12=94 X 24=94
Skin thickness- .032=94
Channel width- 1-5/8=94
Channel height- 1/8=94
Volume of water it will hold- 15 oz.
Inlet size- =BD=94 hose barb (smaller ID about 3/8=94)

Held still about 5 ft from the outlet
Water temp in- 139 F
Water temp out- 119 F
Pool temp- 89 F

Moving vigorously for more flow
Water temp out- 114 F