Terrence, What percentage of those 24 planes had AOA indicators, and what is the percentage in the entire fleet, preferably by model? While AOA is a useful tool, I am not convinced that having AOA and using it under normal conditions will immunize you from a spin under abnormal conditions. If an AOA systems fails in a non conservative way it could induce an accident that would not otherwise have happened.
terrence o'neill <troneill@charter.net> wrote:
Jeff, Thanks for the Lancair accident update. Note that of these 126 Lancair accidents, 54 included fatalities, and 24 of the accidents definitely resulted from a stall/spin -- the last pilot-controllable event before the pilot pulled his wing past its stall AOA and became a doomed passenger. Note that a wing of a trimmed a/c will not stall unless the pilot pulls the stick back too far, causing his aircraft to pitch up to a stall AOA... which he
unintentionally does because he cannot SEE the realtive wind and his wing's stall AOA. A sad, unnecessary waste of friends' and families lives, beautiful aircraft, and years of creative work, all for the lack of an inexpensive AOA indicator and a little training to develop habitual use of it. Terrence O'Neill L235/320 N211AL
Regards, Bill Hannahan
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