Mailing List lml@lancaironline.net Message #50074
From: <Sky2high@aol.com>
Sender: <marv@lancaironline.net>
Subject: Re: [LML] LNC2 AOA Pitot tube location?
Date: Thu, 08 Jan 2009 19:07:44 -0500
To: <lml@lancaironline.net>
Chris,
 
Consider mounting it on one of the aileron bell crank access cover.  That may position the pitot within the desired range.  The cover makes it easy to deal with the required connections as long as they are kept clear of the aileron mechanisms.
 
It is possible to route the pressure and electrical lines through the rear spar and along the aft face of the spar to reenter through the fuselage filet close out. 
 
Another possibility would be to route the lines thru the outboard bell crank area rib and the wingtip rib, then back to the cockpit through the pvc pipe that carries the recognition/strobe light lines.
 
Scott Krueger AKA Grayhawk
Lancair N92EX IO320 SB 89/96
Aurora, IL (KARR)

Pilot not TSO'd, Certificated score only > 70%.
 
In a message dated 1/6/2009 8:23:28 P.M. Central Standard Time, cskelt@earthlink.net writes:

Folks,
I was persuaded by the arguments cited on the List in favor of an AOA indicator and just received a Dynon AOA Pitot tube to replace the standard AN5812. It's 2 1/4 inches longer than the AN5812, and so sticks out a couple of inches in front of the leading edge. In the installation instructions Dynon recommend that the tip should be between 2 and 12 inches aft of the leading edge, which would mean I need to move the mount aft to outboard of the gear doors. This would be a pain, and would also result in a longer and circuitous route for the pitot and AOA plumbing, as would mounting it at the wingtip, etc...
 
I don't believe I'm the first to retrofit an AOA probe, so does anyone have views or experience on whether it would function well aerodynamically?
 
Regards, Chris.
 
 
 
 



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