I'm mostly a fixed wing builder, but I have a quad too (450 frame, 2216 1250kv, 40A BLHeli LittleBee ESC, 1046 prop, Revolution FC, Ublox GPS/Mag, 10ch RX, 2-4x 2200 3s).
The problem I have is that when setting up, the motors spin up very easy at a low rpm.
But then, when I actually try to fly it, any initial throttle makes it jump, rock and wobble. Motors spin in the right direction. Props are right side up.
Some times it suddenly works as it should (imho). Motors run evenly and spin up to lowest rpm and stay like that untill I throttle up. Most times however, one or two motors seem to lead their own life and run (much) faster at initial startup or they spontaneously stop running. It's not the same motors all the time, so I ruled out ESC's and motors.
I'll try higher startup revs, but in the meantime ... any suggestions are welcome.
Running LP 16.09 Next
P.S.: Mode 1= Stabilized no GPS Cruise, but I fly with GPS and Vario. Makes no difference in hopping at start up.
Aux Mag only <5% Orientation is correct (000-180-000). Cables are twisted. GPS is on a 35cm pole and at least 25cm (10") from any power source but it's own and >30cm (12") from the motors, ESC's, etc.
In flight it is stable. Pos. Hold works. RTB works. It's just a bitch to get it off the ground.