I've been sperimenting with PIDs on my quadcopter and I've noticed that pitch P = 65 causes double front and back flips which looks like a roll of death (or in this case a flip of death) and lowering pitch P to 60 solves the issue. Why is that? Can I mitigate this with filters or D gain?
I've also noticed that certain values of P and D mix well and make the quad smooth but if I bump up the I gain to twice as high as my P gain then my quadcopter bounces back. Is this reasonable or there's a problem somewhere else?