On 12/13/2020 8:37 PM, Samuel Spanovich via KRnet wrote:
..the second I extend the speed brake, for whatever reason, my plane decides to
pitch up a decent amount.
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
Mine pitches nose up also with extension of the speed brake. The amount
of trim tab deflection you see in the photo
https://www.dropbox.com/s/dn8dgb5y836j3um/IMG_8611.JPG?dl=0 is all
that is required to trim my stick force to zero on landing. I don't
touch my trim button again until climb out. My fuselage is stretched
24" over the standard KR2 so that might make a considerable difference.
Also, my horizontal stabilizer is set to zero degrees pitch and
requires nose up pitch trim at cruise to relieve considerable stick back
pressure from a zero trim tab position. If my stabilizer were set to a
more beneficial cruise position (negative AOA) I'd require more more
nose down trim on landing also.
Every KR is different. You have to go with what you have and either
modify it or fly it accordingly.
Larry Flesner
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