why I think it crashed:
The night before I moved the servo wires for the rudder servo closer to the ESC wires leading to the back motor I think that this caused the servo to interfere and lose sync and move erratically to each side. When I got the Tricopter the servo was locked in position way off centre and was frozen. I unplugged the tricopter and then plugged it in again and the servo continued to work perfect leading me to believe it was interference. The servo has lots of play in it now so I do have to get a new one.