ORIGINAL: BobbyRichardson
I was asking about knife edge flight and thanks for your help. The planes starts to pitch towards the canopy during the first 30% degrees of roll before rudder is introduced to hold knife edge. after the ruder enters the scenario i have the pitching to the belly mixed out and will track straight with pure rudder input. Would the initial slight pitch (enough to track off line) be P factor. I added some weight to the nose 1 1/2 oz on a 90 size plane and it helped the pitching??
"The plane starts to pitch toward the canopy during the first 30° of roll before rudder is introduced...". This might be the result of an unconscious movement of the elevator as you are moving the ailerons. It's common. I catch myself doing it sometimes. It's possible to develop habits like this that you do consistently without realizing it. Or you might need to roll in faster? If you bank slowly to 30° or so, the airplane will naturally start to turn a bit. P-Factor is not a likely cause of the deviation you describe, since that only becomes significant when the propeller disk is not normal to the slipstream.
You don't have rudder slaved to aileron, do you? That might do it too. Check all your mixing on the ground to make sure it's doing what it's supposed to.
Which pitching did the nose weight help, the initial upward pitching, or the belly pitching that you have mixed out?
What kind of plane is it?