From: "Marvin Kaye" <marv@lancaironline.net>
Subject: Re: [LML] Re: AOA Calibration
To: lml
Date: Sun, 11 Feb 2007 20:06:38 -0500
Message-ID: <web-1831120@logan.com>
In-Reply-To: <200702112355.l1BNtUjs027338@bmw.hapgoods.com>
References: <200702112355.l1BNtUjs027338@bmw.hapgoods.com>
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Posted for "Matt Hapgood" <matt.hapgood@alumni.duke.edu>:

  
  Bill Harrelson and I attempted to calibrate my AOA today.  Unfortunately, we
  were unsuccessful.  I was able to blame my inability to calibrate the AOA on
  my own poor piloting skills (to which Bill and Sue can probably attest after
  witnessing my landing at Dogwood!), however no such excuse existed after
  Bill piloted the plane for our in-flight maneuvers.
  
  It gives "Barking Betty" non-stop during cruise
  Now I'm back to the drawing board.
  
  Matt

[Hi Matt... I'm assuming that the display was showing red chevrons while 
Barking Betty was yelling at you.  We there any attitude that caused the 
display to show changes in the AOA, or was it locked in a high-AOA or stalled 
position (ie, entire display lit up)?   Did you physically verify the 
integrity of all the tubing hookups to the AOA computer?  As we discussed back 
when you first posted your request, most of the problems Jim and I encountered 
in trying to get to the bottom of calibration difficulties related to leaks or 
improper connections between the ports and the computer.  The complete 
instructions for verifying that the tubing runs are correct and working 
properly are included on the calibration checklist.  Failure to complete that 
check can render the rest of the calibration process moot.  If, however, you 
did that part and then made sure that the hangar calibration was done in a 
wind-free environment but still couldn't get a valid calibration, there is 
certainly a possibility that something is amiss with the computer.  Give Rob 
Hickman a call at Advanced Flight Systems, I'm sure he can help you the rest 
of the way to the bottom of your problem.   <Marv> ]