I have a tricopter that was flying just great last week. After i mounted a 2 axis gimbal it didn't want to fly. The motors were spinning ok. It's not too heavy, the motors can lift much more than that. The estimated motor+prop thrust for my tricopter is somewhere around 2.6 kg and mine is just 1.7 kg with the gimbal.
It seems it just lost power, it just doesn't want to lift off the ground.
Is it just me who has this problem? Has anyone solved it?