Here are the numbers I came up with on today's flight. They are not
scientifically accurate but close. I used a "Smartlevel", accurate to
within 1/10 degree and the new scales I recently purchased. I checked
my math several times and re-read the post several time so I think it is
close to accurate.
My wing is set to +3.5 at the root and has -3.0 degrees washout.
The "level" reference on my KR is the firewall so I leveled the KR and
found a convenient spot in the cockpit I could take measurements from
while flying without taking my hand off the stick. I found a spot I
could use that had a correction factor of -.5 degrees.
Other data points before flight are as follows:
Takeoff weight = 1120 pounds
Test weight = 1105 pounds +/-
Wing incidence in three point attitude on the ground = 11.5 degrees with
60 pound tail weight, no pilot. This confirms why I can't make full
stall landings without hitting tail first, something I realized on first
flight.
Barometer read = 30.09, temp = 70 degrees F.
Flight data:
Climb at 3000 feet, 120 mph indicated = +4.5 degrees, with corrections
(-.5 + 3.5 ) = +7.5 degrees angle of incidence at the root, +4 degrees
at the tip.
Cruise at 5000 feet, 155 mph indicated = -1.5 degrees, with corrections
(-.5 + 3.5 ) = +1.5 degrees angle of incidence at the root, -2 degrees
at the tip.
When I take in to account the 3.0 degree washout of the wing, the wing
at the tip is flying at -2.0 degrees.
I'll not speculate on how the out wing panel is generating lift at a
negative angle of attack. I'll leave that to the reader.
As always, your results may vary........
Larry Flesner
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