Just curious...

Were these power off or power on stalls?  If power on, how much power?  What
was the Gross weight?  Where was the CG?  Is the video available?  Was any
"detailed" analysis done of the wing and/or washout symmetry?  If both wings
were the "same", what was the tolerance of "same"?

Rick
ES-building

-----Original Message-----
From: Lancair Mailing List [mailto:lml@lancaironline.net] On Behalf Of
rfroelich@cox.net
Sent: Monday, June 26, 2006 8:34 PM
To: Lancair Mailing List
Subject: [LML] LIV Stalls

I tufted the wings of an early LIV (four gear door version, two per side)
and stalled it a number of times to videotape the stalls.  We  had two LIV
pilots on board, one videotaping while the other flew.  In all but one stall
the right wing dropped and the plane never went through more than 60 degrees
of turn.  Only once did it stall straight ahead.  

The aerodynamicist who reviewed the video, had never seen the tufts go
inboard at the stall (which was what happened).  He recommended extending
the wing root fairing further back on the fuselage, to overcome this
abnormality.  Later models with just two gear doors on the mains (one per
side), have extended the fairing.  Am anxious to check tufts in stalls on
the one I am currently building.  

I did hear back in the 1990's of one LIV loosing 8,000 feet before being
able to recover from a stall/spin.  

Robert Froelich

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