"Perry J. Mick" wrote:

Paul:

You left too soon!  I flew a test flight just before sunset.
Earlier I did some ground tests and no leaks.  I was
a bit concerned, it didn't seem to be cooling on the ground
as well as before, but it was warmer than normal, and
it still took a long time for temperatures to come up
at 1500 high idle.  Put the cowls on, taxied out,
everything looked good so took it around the pattern.
The new rad cools just as well as the old one despite
the change in rad design and ducting.

My oil temp was a high as ever, or maybe even
higher, but I haven't sealed any leaks yet.  That
was with those big holes still in the cowl around
the oil cooler duct too.  But on the ground I was
getting good suction at the oil cooler duct inlet,
because of the ducted fan sucking from the exit
side.  Maybe I need to try the '86 oil cooler, maybe
there are some unseen differences between it and
the '82 I'm using.  Maybe that is why I've had
worse oil cooling problems than everyone else.

--
Perry Mick
Duckt N7XR
http://www.ductedfan.com

Maybe you need to streamline the fuel sump tank or raise
it a bit. Perry's new rad core is 12 by 14 by 2 inches thick net.


Paul Lamar
 
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