Interesting problem

[Heli37]

so, I have built an alien with a naza lite and all appears to be correct. What is strange is that it flies fine in manual (I fly helis so I like manual), it seems fine in atti, but in gps it does what I want for a while then it heads straight up!! Eventually after trying every switch the motors shut down and it returns to Earth rather ungracefully (ie it drops like a stone until it meets terra firms rather abruptly). Has happened twice so far -100% . Please help, my experienced mentor is flummoxed as well

 

[cootertwo]

Check for vibrations. I've had a Naza Lite do the same thing when I tried some out of balance props. Lucky for me, I was under a tree canopy, and they caught it.

 

[John Doecliff]

I would look at the led indicator and see what the status light indicates. If it blinks yellow that means it has lost comms with the transmitter. If you loose transmitter signal it is supposed to go to 20m, pause and then go to the home point.