Mailing List lml@lancaironline.net Message #27815
From: <Sky2high@aol.com>
Sender: Marvin Kaye <marv@lancaironline.net>
Subject: Re: [LML] Re: Alert. NACA 64212
Date: Mon, 24 Jan 2005 21:22:22 -0500
To: <lml@lancaironline.net>
In a message dated 1/24/2005 1:37:19 P.M. Central Standard Time, bill_kennedy_3@hotmail.com writes:
I'm interested in taming the stall characteristics of my 320. I've tried VGs
without noticeable change, but didn't really experiment with different chord
location or yarn (I tried 10% chord from tip to stub border -- they were as
ugly as I expected). I can live with the performance that I've got (nasty
stall in all configurations -- thankfully fairly benign in ground effect),
but I'd go to some trouble to improve if someone more creative than I can
dream something up.
Bill,
 
Be careful.  We have a very interesting variant of the NLF(1)-0215F (flapped natural laminar flow) - totally different than 64212.  Our wing utilizes the reflex flap to provide a tremendous reduction in drag even though it is a relatively FAT wing.  It has the interesting characteristic that dirt only adds to the drag, not to any significant loss of lift.  The wing tip is, unlike the Legacy, is washed out quite a bit.  It maintains laminar flow over quite a bit of the upper surface and a good deal of the bottom - the wing mis-built, rough, ugly underneath, mis-matched incidence, etc could all contribute to less than perfect performance.
 
For me, I'll avoid the stall regime and regale in the performance area.  I will take no naps flying my LNC2.
 
Scott Krueger AKA Grayhawk
Lancair N92EX IO320 SB 89/96
Aurora, IL (KARR)

Fair and Balanced Opinions at No Charge!
There is an oxymoron in that, somewhere...

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