This weekend i made more progress with the setup on my plane and eliminated the proverse roll coupling i mentioned earlier.

I always felt that the stab was placed too high on my Radiance prototype, forcing me to use high incidence (+1.1 deg) on the wing to counter the pull to canopy on the vertical uplines. This was fixed on the kit version, but it remained unchanged on my prototype for 3 years. With the competition season now over, i had plenty of time to work on the plane so i moved the stab 30mm lower and changed the wing incidence to +0.7deg, as Bryan recommended. This improved many aspects: the upline pull to canopy disappeared, knife edge roll coupling was gone too, downline mix slightly reduced.



Just to test the improvements in KE performance brought by the fuselage strakes and fin fences, i went through the first few P13 maneuvers (half clover leaf, stall turn, roll combination, half square loop, triangle and split S), all performed in knife edge position. The corners seemed to be as tight as when performed in normal position and i never used full rudder throw. Of course, the maneuvers didn't look as smooth and precise because it's quite unusual for me to perform them on KE, but there's enough rudder power and fuselage lift to go through the maneuvers, no doubt about that.