Mailing List lml@lancaironline.net Message #54515
From: <rwolf99@aol.com>
Sender: <marv@lancaironline.net>
Subject: 320 Airfoil Reflex
Date: Sat, 20 Feb 2010 22:47:13 -0500
To: <lml@lancaironline.net>
Larry and Greyhawk -
 
My understanding matches Scott's, i.e., the 7 degree reflex is "built into" the wing so that the wing-body fairing lines up with the flaps when they are reflexed.  However, I heard a rumor that earlier kits (possibly the 235, and maybe the 200 in the EAA museum) may not have had the reflex built in.
 
I don't know the anwer, but I have provided the airfoil coordinates for the NLF-0215 airfoil used in the 320/360.  I'm sure it will be a pain to measure the wing and figure out what flap deflection matches the basic airfoil, but I think it's the only way to get your answer.  This data coes from NASA-TP-1865 written by Dan Somers in 1981.  It is the definitive definition of the airfoil (if I may be permitted the redundancy).
 
A more relevant answer, howevr, might be obtained by adjusting the flaps in flight until you get the performance you want.
 
Enjoy!
 
- Rob Wolf

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