My first experience on a rotorcraft, a coaxial heli. It came as a ripped off battery and electronics by my mischievous nephews. My cousin called in for fixing it up after I discussed my recent stepping in to rc.

Took it and fixed the electronics, but one of the 18650 battery cell was missing and the other dead and shorted. I was nervous about how it will behave and it did behaved funny. Reason: I had not installed the cowl, and the heli was a bit tail heavy. Couldn't understand until today morning, and finally it was hovering nicely.



Really enjoyed the first few hovers and crashes, but one of that was a heavy from 2nd floor to ground. Luckily nothing broke and it continued to fly.. I had used a 2 cell 1.1A 20c lipo instead of the battery it had come with, so the flight time was like 3-5mins.






I then decided to try a 3 cell lipo from the th9x tx and it was fast under bench trials. but something happened and I believe something in the electronics is wrong as the gyro is not fixing and not able to start. Hope I will be able to fix it. the single mainboard is numbered 'JH-745B-1', anybody has any schematic or component list?