rixlumb1
lvl.1
United Kingdom
Offline
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For some reason , having flawless flights on my P2 V2, since Jan 2015, even after adding walkera G2d gimbal, iosd mini, and a SJCAM5000+ for HD recording and video out for FPV to a 200mW 5.8g TX, mine seemed to jerk around while hovering shortly after take off.
It lost height rapidly and did try the failsafe switch, the only response from that was the leds changed to yellow which told me it still was seeing the transmitter. It crashed into a dry reed bed from a height of 6 metres.
After it went down I locked the throttle down to power down the motors. When it was found in the long reeds, could still hear the motor/s trying to turn (A guy with a P3 hovered over it until it was rescued), 3 of the motors had melted into the plastic shell.
After opening it up I found 1 ESC had total burnt out and blackened inside housing, melted all its cables together, one motor survived completely along with the ESC.
I had very recently fitted an ASSAN SBD4 decoder into the receiver output so I could pick off the Gimbal Pitch control before it got modified by the Flight controller (which adds its own leveling offset to the pitch and roll outputs on F1 & F2) as the Walkera G2D has its own levelling system built in.
I believe what happened was, the extra wires/connectors inside was pushing down on the edge of the main board just over the receiver and the top of the brass antenna connectors was vibrating on the underside of the main board right on the Motor feed point and eventually the vibration wore away the painted surface coating and began intermittently shorting the +12v feed, which caused a drop on that motor, the opposite motor tried to correct by reducing power which caused it to jerk about & drop.
There is only a fraction of a mm between the two boards and WITHOUT any sort of insulation.
So a plastic insulator will be fitted after I replace 3 x motors and ESC's , the body shell, the taller skids which absorbed a lot of the force as the camera gimbal and camera were still working fine.
Cost to repair £121 or $190 plus postage from the states...cheaper than a new one......
But I may still buy a basic P3 as well. |
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