Drift issue in ANGLE

[lit1088]

my hardware is naze32, In angle mode, before fly ,I have do accelerometer calibration, in few minutes ,the roll and pitch will drift. what is matter? I've been testing it for a week, and it's all like that.

[BadRaven]

I had this, drove me nuts........it was perfect in Rate...but Angle or Horizon had bad drift.....then I broke a propeller, and ................perfect.