Thanks 321. I have been suspecting a brown out but I am not sure. The rudder servo (JR DS3400) is brand new but to add to that, I went through 3 esky servos on the rudder with each of them burning out in mid flight. One of those wound up giving me the same spinning issue but that time I suspected the rev/nor switch on the gyro was defective and removed it (hard wired the gyro PC board).

I will be replacing the gyro the motor shaft and bearings in the rebuild as well as a new ESC/BEC fora more powerful unit (currently using 25amp). Waiting to sell my Shuttle on the bay before I can put more $$$ into this one.