In a message dated 5/12/2006 7:24:56 A.M. Central Standard Time,
marv@lancaironline.net writes:
A safer
Lancair "record"?
I would think that - by now - it would be obvious
that what is needed is a
safer "Lancair." We all know that Lancairs
are neat planes, but they are
also very hot to fly, with virtually
no allowable margin for error.
One only has to look at the
statistics and the independent research to know
it is an issue with
the plane. In fairness, this is not unique to
Lancairs... My very
first plane (which I still have) is a Piper Comanche
that is very
difficult to insure because it doesn't have a good record (with
cause)... And there are many others, both certified and experimental. It
all
comes down to static and dynamic stability and controllability
designed into
the plane during engineering - something that the
Lancair series (and most
experimentals) have never done. Probably
the same reason that the Columbia
was so difficult to
certify.
When all is said and done, design stability (verified by
proper flight
testing) is the only way to make a plane safe with
great performance... It
is difficult, but not magic.
An
incredible example of that (if it ever gets built) is the Phoenix
by
FlightSciences.net (of which I am not a part of).
Again, the
Lancairs are a neat plane, and though maybe not "un-safe", they
are
definitely "not-safe", a reality that everyone that buys or builds
one
should recognize and be comfortable
with.
Rienk,
Ahhhhh, not quite right. Normal certificated GA aircraft, designed to
FAA standards and rules, contain design provisions to be
somewhat forgiving of pilot error - especially in the low airspeed
regime. I believe that a stall warning device is required.
Columbia was not difficult to certify after the design had to succumb to rules
that necessitated leading edge cuffs in the aileron region, thus making it spin
resistant. Other things were done to make it meet the low speed stall
requirements.
On the other hand, experimental Lancairs were designed to efficiently
extract real high speed performance on less horsepower - at a low speed
flight regime compromise while adhering to the placard that appears in each
plane stating that it was not built to FAA standards.
Although similar, no two Lancairs are the same. The pilot is always a
test pilot. The builder/pilot frequently realizes that fact while the
remote builder/buyer usually does not. These are not spam cans and they
don't fly like spam cans either. Lancair's are not unsafe if the
plane's high performance characteristics, and the lack of low speed
performance ones, are respected.
I knew David as a skilled pilot and friend, having met him twice in trips
to the Sebring High Performance seminars. So far all we know is that the
engine sputtered on takeoff and an attempt was made to turn back to the
airport. They didn't make it. I hope we can find out the cause of
the sputtering engine. We may never know why the decision was made to
return to the airport rather than to find a suitable landing site ahead (if
any). It does appear that a low speed stall occurred in the
turn.
For others, please do not try to tell me that an AOA is a crutch.
Scott Krueger