Understand all the mixes you are doing, but not the one throttle to rudder are you just compensating for “P” factor.Put two flights on the Champ at Wally's Squadron and went out this morning to my home field and put 6 flights on it. About 25% of the club is at Wally's so no one was there. I have been playing with throttle to elevator mix and have it dialed in now at 10%. A lot of the problems I experienced early on were due to lack of down thrust, the plane would zoom up and become uncontrollable. I have 20% aileron to rudder mix now and that seems to work well. Next I plan to work on the throttle to rudder mix. Flew six flight today, it is flying better now that I feel comfortable enough to fly scale figure eights. The plane requires coordinated rudder to turn so that is coming along.
I have question before I try to help, do you believe the colour spark plugs charts work or indicate properly with our engines with the amount of oil we use. And yes I agree with you that one cylinder is oily and not burning as clean as the other. Be interesting to see what two new plugs will do. If I may suggest only change the oily one. You could have some oil blow by on the one cylinder or a sticky ring.Picked up a miss in the engine, seems to be getting worse as time goes on. Decided to check the plugs. It appears the left cylinder is getting more oil than the right. I know when I took the left cylinder head off there was plenty of oil in the cylinder after sitting for almost a year. Note oil drops at top of cylinder.
This is what the plugs looked like. The right side plug looks good while the left side is oil fouling. The engine idles and ran good at full throttle but would miss at cruising speed. At any rate put two new CM6 plugs in this morning and I'll see what happens later today. May need a slight carb adjustment as well but it sounds good at idle and full throttle
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