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Ed,
Since you are building two new ducts, I would like
to propose that you also install the thermistors so you can do the following set
of tests (briefly mentioned at SNF). Basically at a steady power setting
in flight, and potentially at different air speeds, measure the
following temperatures:
Tin left, Tout left , Tout right
1. With your *current setup*, with one reshaped
duct and one original duct.
2. With your current left duct and one of the new
ducts, and
3. with both new ducts.
Since you are plumbed in series, and have identical
rads, this will give us information on the performance of the
ducts.
Bill Schertz
KIS Cruiser # 4045
----- Original Message -----
Sent: Friday, May 21, 2004 6:58 PM
Subject: [FlyRotary] New cooling
Ducts
Well enough of that, since the new C drive will
apparently enable the engine to turn 1000 rpm higher, I decided that was good
enough reason to finish my experiment with the cooling duct that turned out
well. Rather than filling in the other duct with expandable foam, I've
decided to build two new ducts with the proper curve built into the
walls. So will be using the Streamline coordinate system
(modified). Since there is not enough space for the full distance, I
will truncate the streamline coordinates as I did on the test duct.
Consultation with the gentleman who wrote the excellent article on liquid
cooling in the January 2004 Sport Aviation and my own test
indicated that as long as the duct was truncated from the
inlet end, the adverse effects on airflow should be minimal.
So, will get started on that probably next week
early. Got the coordinates laid out in my old Cadd package only to find
out that its printer drivers will not drive the new HP printer I recently
got. So I guess I'll try converting the CADD to a DWG file and go to one
of the CADD packages I acquired over the year but never really used to see if
they have the correct driver. One thing or the other.
Ed Anderson
RV-6A N494BW Rotary
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Matthews, NC
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