Bought yesterday a new p4 and finally got to fly it today. Calibrated the compass and IMU (firmwares up to date according the app) and the whole first flight in beginner mode went well except a little twitching of the bird while steering with the right stick. This did not bother me since i hadd full control and the bird did smooth and slow movements exactly how it was ment to do. Second flight the horrible problems started. Calibrated the compass again and the sliders were green and the values showed 1. Took the beginner mode off and lifted the bird up and flew perfectly fine the first 5 minutes. First problems i noticed when i was howering maybe 20m over myself and saw that the bird was not hovering still, it was doing a circle with the radius getting bigger and bigger. Tried flying forward and at this point it did it, started to look for a safe place to land and noticed that i was having close to zero possibility to control the bird anymore. Throttle up seemed to work fine and managed to dodge a tree with throttling up. Throttle down did not bring it down like it normally does. I have experience from cheaper birds with no aid tech, and without trying can say with confidence that i could fly the p4 in atti mode and control it properly. But this was no atti mode, i had zero control of direction of the bird most of the time. Tried even holding the rth button at some point but all it did was stop for a few seconds and then the gliding back and forward all around with pretty high speeds. Got it to land on uneven ground and powered it off. I was really confused of what happened, but decided to move to the field and try again on low altitude and see what happends. Everything worked nicely again at the beginning except minor twitching a few times. After a few minutes i noticed again that the bird was not hovering still and i started to look for a place to land. With close to zero control again i got it to land on the sandroad, only thing i was touching at this point was the throttle down, and i had it fully pressed down when the bird touched the ground. Suddently the bird flips the wrong way around and the propellers start to spin against the sandroad with really high speed. At this point i still had the throttle stick fully pressed down. Tried the emergency shutdown with failed succes a few times, and it finally worked and the bird shut down.
So my question is, what the hell can cause this kind of behaviour? File attatched shows the aftermath.
So my question is, what the hell can cause this kind of behaviour? File attatched shows the aftermath.