From: "Marvin Kaye" <marv@lancaironline.net>
Subject: Re: [LML] Re: AOA Calibration
To: "Lancair Mailing List" <lml@lancaironline.net>
Date: Mon, 12 Feb 2007 09:39:02 -0500
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Hi Matt,

I'm sorry to hear that your calibration exercise was unsuccessful.  I wish I 
had another direction to point you to but I'm afraid that I don't, given the 
results you reported in your post.  The only thing I can see is that you 
mentioned that blowing through one of the tubes was more difficult and that it 
might have been the static port (the one that indicated on the altimeter).  It 
seems to me that a blockage in the static line  wouldn't account for the 
results you're seeing, at least not at first glance.  A blockage in either of 
the wing port tubes that would lock in a high pressure for the bottom wing 
port or a low pressure for the upper could result in a constantly stalled 
indication.  If the ports are all clear, though, the next thing would probably 
be to send the computer unit to Rob and have it tested on the bench.  Please 
report back to us what Rob had to say after you speak with him.  Good luck.

    <Marv>


"Matt Hapgood" <matt.hapgood@alumni.duke.edu> wrote:
  
   Marv,
   
   Here are replies to your questions:
   
   1.  All-Red chevrons only, and nothing changed the indicator - including
   very high AOA and very low AOA maneuvers.
   
   2.  Yes, we physically verified all the hookups, and all appeared fine (I
   did the blowing, Bill did the verifying).
   
   3.  We did the hangar calibration inside Bill's hangar.
   
   Only item of significance that I could note was that one of the tubes was
   relatively harder to blow into (maybe the one that indicated on the
   altimeter?).
   
   Thanks, and I'll be calling Rob this morning.
   
   Matt