Now, unfortunately, OpenOffice will not read the doc file that Rusty sent,
so
I do no know how he tested.  The air volume would be very important for the
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 :-)

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:


6-16-02

Tested Ed’s 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 ½” 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
½” ID tube going into the rad, and out of the rad.  

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

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

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


Test Rad #1

Single layer (1” borders, ½” dividers- 4 each @ 20.25” long)
Dimension- 12” X 24”
Skin thickness- .032”
Channel width- 1-5/8”
Channel height- 1/8”
Volume of water it will hold- 15 oz.
Inlet size- ½” hose barb (smaller ID about 3/8”)

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