I have a Smartech Skylark, a clone of Ikarus Piccolo, Dragonfly, etc..
The model is pefectly mounted and the components (like battery, motors,
etc.) are fixed.
The problem is that when I fly in hovering, after few seconds the helicopter
start to be like an hula hoop. The oscillation is so critical that I have to
land immediatly !!!!
Some suggestion ???