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<< Lancair Builders' Mail List >>
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Just a few comments on Bob Chesley's unintentional incipient spin.
At the higher angles of attack seen just prior to stall most of the
vertical tail is going to be blanked by the fuselage and wings, hence the
wallowing around Bob experienced. With this considerable loss of normal
directional stability one might need to pick a point out on the horizon and
attempt to keep the airplane relatively pointed straight by working the
rudders quickly. I think Doug Weeldryer is right, the needle ball lags way
too much to be of use under these conditions. Also, any input of lateral
control will create lots of adverse yaw. The down going aileron will create
considerably more drag compared to the up going one and very quickly help to
create a departure, so it's important to use as little aileron as possible
when investigating stalls. The very smooth Lancair airframe is going to
give less warning of stall and will break more abruptly than the "spam cans"
with their relatively rough draggy exteriors.
Bob, I think you needn't feel any loss of pride. You did several
things right, being at 9000 feet, entering the stall slowly (one knot per
second is a standard), and instinctively stopping the yaw. Pretty good
handling of the situation, I say. One ought not to be so unfamiliar with
the stall characteristics of the airplane that something like this surprises
you in the pattern. Being thoroughly familiar with the stall
characteristics is really important, but go and investigate stalls after you
have enough time in the airplane to be comfortable. For some it may be as
little as 10 or 20 hours, others will need more, maybe 100 hours. Thanks
for sharing the experience.
Cheers,
Pete
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