19 seconds in it twitches the longer he goes the worse it gets, to bad he doesnt have eagle tree to see what the voltages are doing.  what kind of esc and motor ,gyro and servos, battery? how hot are things when they come in after 30 seconds (motor,esc,batt,connections) it could be a bad esc, stuttering /power loss sounds more like the tail blades loosing power then catching back up. this will be a toughy unless someone else had this happen and can pinpoint it. im glad i have full replacement parts for the blade 400 and exi250 (can relace anything to find out whats failing if needed.</p>