BTW boundary layer rakes are not hard to make. Here is one I made
   for Tracy.
   The last two are from a ram jet in a museum.
   -----------------------
   It's a little tougher to get an idea of BL profile when it is only
   expected
   to be about 1" thick.  I saw a really nice design using  small pitot
   tubes
   stuck into the side of a curved larger tube; curved from horizontal to
   vertical, so near the surface the tubes were very close together.  I
   think
   for now I will forego measuring the BL, and just try some ways to
   overcome
   it.
   ------------------
   BTW Al As I recall we measured positive pressure on the top of the
   left rear
   strake of Perry's Long EZ for some strange reason. Perhaps you should
   measure
   the pressure in the area of the oil cooler outlet. I can search the old
   messages
   if you wish.

   BTW if you want to fly up to Santa Paula I could help you with the
   pressure
   measurements. I have all the materials and two or three manometers
   lying
   around. If not I could drive down next weekend in the RX8 and bring
   a bunch
   of stuff with me.

   That is a very generous offer, but I'll not take you up on that just
   yet.  I
   have sent my EC2 off to my son in Boulder for further fixes on the
   EC2 (he
   is an expert on microprocessor design, and has designed after market
   ECs).
   It seems the EC2 will not accommodate my combination of composite
   airplane,
   3-rotor engine, and my electrical system design.  That is a long
   story I
   don't want to get into here, but we have encountered RF noise issues,
   electrical noise issues, and some designs flaws associated with
   adapting the
   two rotor version to the 3-rotor.  I'm not sure I'll have it back by
   this
   weekend.

   I have a monometer setup for measuring two separate pressures that I
   made
   for doing flow tests on the rads and cooler before installation. I
   will use
   that for measuring the delta P across the cooler, and the pressure
   at the
   exit.  I've only figured out how to get two tubes into the cooler
   enclosure,
   so this setup will work for now.  I'll try taping the strake/wing
   crack in
   front of the exit, and a fowler flap on the exit of the wing root
   rad on the
   other side.  The temp measurements will tell me if it is doing any good.

   This week the high temps at Ramona will be about 100F.  That helps me be
   less frustrated about not being able to go flying:-)

   Al

   A Fowler flap? A flap that goes out back and down like my C182?

   Paul Lamar
   ----------------
   Sorry; I meant a Gurney flap; about 3/4 x 3/4" plastic at the
   trailing edge
   of the exit fairing. (but then, you knew that :-).

   Al


Gee..  And I was getting kind of excited about the idea of a fowler cowl
flap..  :)  It's probably not a completely silly idea I think..


Matt-


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