Subject: NACA duct orientation.
From: Paul
Date: 3/1/1999, 6:12 AM
To: z

Anderson Ed wrote:

Bill, built up a snorkel type inlet for the oil cooler over the week
end.  As several folks have pointed out, the position of my NACA duct is
less that optimum for the NACA type of inlet.  Did not get a chance to
fly with it yet, but intend to do so next weekend.

 I happened to be thumbing thru Racing Beat's Technical Catalog this
weekend and notice an oil cooler that looks like my Earl Performance oil
cooler which was stated to be a replacement for the stock 13B oil
cooler.  I noticed it was a 12 1/2 x 11 x2 whereas mine is a 12 1/2 x 8
x2 so it is apparently the 32 row cooler while mine is 25 rows.  My
cooler seems to do the job except right at WOT (6000 rpm) where the oil
slowly begins to build and will exceed 210F - those 7 addition rows may
be what I am missing.  But we will see if the new inlet helps.

Ed Anderson


 
The Aircraft Rotary Engine Newsletter.              Powered by Linux.

http://home.earthlink.net/~rotaryeng/            http://www.linux.org