Content-Type: text/plain; charset=ISO-8859-1
Content-Disposition: inline
X-Mailing-List: lancair.list@olsusa.com

          <<<<<<<<<<<<<<<<--->>>>>>>>>>>>>>>>
          <<  Lancair Builders' Mail List  >>
          <<<<<<<<<<<<<<<<--->>>>>>>>>>>>>>>>
>>
Another excellent reference for stall characteristics of the IV is from
Bob Froelich at refroelich@juno.com.  Bob documented the stall
chararacteristics on video tape, with a  tuffed wing, using our AOA
Professional instrument to gauge angle-of-attack in every configuration.

Bob is the only one to have documented the stall characteristics of the
IV in the real world of flight that I am aware of.  Bob's data shows
a nicely behaved stall that developes inboard on the flaps and works it
way forward and towards the tips.  Another source is LNN p. 414 on Stall/
Spins and secondary stalls by  Charlie Kohler.  Charlie advises avoiding
deep stalls in IV's.

The Washington State Lancair-IV Pilot Association may be doing some
Lancair-IV research into stalls, laminar flow, and laminar separation in
1999.  Of course we will report any thing of interest in the Lancair
Network News.

According to the NTSB data base, Stall/spins account for 45.3% of
Experimental Aircraft fatalities.  Note that stalls or approach to stalls
under controlled conditions are not necessarily anything like an
unintentional stall occuring at low altitude in a high work load
environment.  The approach to stalls performed at high altitude with
perfect entry, coordination and recovery that you experienced in your
bi-annual may not be anything like the unexpected real thing!

Jim Frantz
Lancair Network News
www.angle-of-attack.com