Great info Mark, thanks you. Im looking for a tail drawer instructor in the LA
aria.
mark christensen KRS2
On Friday, April 16, 2021, 2:01:32 PM PDT, Mark Langford <m...@n56ml.com>
wrote:
I have never spun my KR, but I stalled the KR2S many times, and the KR2
many more. It's simply a non-event in both cases, with one notable
exception (an ill-advised accelerated stall, the details of which will
require copious amounts of beer at the Gathering campfire to extract
from me). I think it's vital that stalls be performed during initial
flight testing of any KR (or other homebuilt airplane), if for no other
reason, to determine at what INDICATED airspeed a stall can be
expected. Once that indicated airspeed number is ascertained, you then
have a pretty solid idea at the IAS that coincides to a stall during
landing, which will help prevent you from dropping your plane in during
one of your early landings, and for the rest of the time you fly the
plane. Without that number, you may be doomed to a bunch of landings
that are too hot, and too hard to handle in a taildragger, or even
worse, a stall into the runway. Fortunately the "ground effect" of
having the wing so close to the runway reduces the speed at which the
stall happens, thanks to the cushion of air compressed between the wing
and the runway, although this phenomenon should be used only as a
tolerance to your inattention to keep up the proper speed.
It's worth noting that the KR2 gives all kinds of warning noises and
vibration from the elevator hinges, and there's no way you could avoid
knowing that you were about to stall it, way before it happens....you
really have to be hauling back on the stick hard to make it happen. My
KR2S stall was more sudden, without the buffeting and noise warnings,
probably due to the laminar airfoil, but you have to be trying really
hard to make it stall, or be oblivious to the airspeed indicator.
The usual recommendation for an Angle of Attack warning device is
probably appropriate here, but having said that, I don't have one, and
have lived through a lot of hours of KR operation.....so far!
Mark Langford
m...@n56ml.com
http://www.n56ml.com
Huntsville, AL
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