Mr Robert Geis wrote:

Paul,

I found this study interesting since I'll be building
a Long EZ and considering the 13B.

http://4dw.net/marcborom/LongEZ/NACA_AirFlow.htm

Does this test fall in line with your studies of NACA
inlets for cooling and would you see this as a
possible installation for me?

Thank you much,

Bob Geis

Don't know. Their web site does not work with my browser.
Probably composed with a MicroSoft product.

Have you read the original NACA paper?

Paul Lamar

Paul, what browser are you using? It works in both Mozilla and Konqueror

for

me, and Konqueror ain't known for dealing well with poorly coded pages.

There

aren't any weird HTML tags in the source - in fact, it almost looks

hand-coded

because it's so simple.

Regards,
Chad

I am using Netscape 4.6. I tried it with and with out Java.
I don't know why we can't have standards that work?
This rational of improving on standards is BS.
The very first NetScape browser and WWW web pages worked
great and were entirely adequate. Things went down hill

>from there thanks to Micro Soft.

Paul Lamar

Paul,

 Try this.  I pulled the web page into Word and saved as a rich-text file.
 Andy

Don't do Word either. Can you send the html? Or convert the Word rtf
file
to an industry standard  pdf file.

BTW Andy what has this to do with NACA ducts?

   Description of Oil Flow Test.rtf

Paul Lamar

Paul, attached is a PDF of the page. It doesn't do it much justice - I tried
to keep the dpi low so it wasn't a huge file. Direct links to the pictures and
a summary of the page follows:

Description of Oil Flow Test
by Marc Borom,
Dec. 15, 2003

Used oil was brushed on areas of the belly of the plane ahead of the regions
where air flow was to be monitored. The plane was then flown normally for
about 30 minutes.  After landing, the oil flow patterns were      photographed.
  Tests were performed with and without an air baffle installed.  The air
baffle used in the test was temporary.  It was constructed of a piece of
cardboard and attached with duct tape.

A significant feature is noted in the area where the width of the NACA scoop
  becomes nearly constant.  Without the installation of the corner baffle, the
oil is blown away from the edge of the NACA scoop, indicating that the air in
the scoop is spilling out and interfering with laminar flow along the belly.
More significantly, without the baffle, the air is not flowing into the cowl
and cooling effectiveness is being lost. In addition, drag is increased by the
resulting turbulent air.

Placement of a simple, triangular baffle prevents the air from spilling out of
the NACA scoop.  An added and important benefit is that cylinder head
temperatures are lowered by about 30 degrees for each cylinder. The tests are
preliminary, and the optimum size and shape of the baffle has not been
determined.  Any suggestions as to size, shape and placement would be
appreciated.

http://4dw.net/marcborom/LongEZ/NACA_FlowTest0010.jpg
http://4dw.net/marcborom/LongEZ/NACA_FlowTest0020.jpg
http://4dw.net/marcborom/LongEZ/NACA_FlowTest0040.jpg
http://4dw.net/marcborom/LongEZ/NACA_FlowTest00454.jpg
http://4dw.net/marcborom/LongEZ/NACA_FlowTest0060.jpg
http://4dw.net/marcborom/LongEZ/NACA_FlowTest0065.jpg
http://4dw.net/marcborom/LongEZ/NACA_FlowTest0080.jpg
http://4dw.net/marcborom/LongEZ/NACA_FlowTest0085.jpg
http://4dw.net/marcborom/LongEZ/NACA_FlowTest0090.jpg
http://4dw.net/marcborom/LongEZ/NACA_FlowTest0110.jpg
http://4dw.net/marcborom/LongEZ/NACA_FlowTest0100.jpg

Regards,
Chad

 
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