I crashed my Goblin 500 today in an unusual manner. Was hovering in about 5 meters and activated altitude limit - it´s lower limit was set to 8m. The heli climbed rapidly but suddenly the motor went to throttle hold. Approximately at this time the log shows "GeoLink Data corrupted". However the timegrid of the log is very corse (10s). Checked the log of my transmitter too - it was OK. Best signal strength and quality. So the radio can't be the cause of the crash. Any idea ?

Excuse me - it was the wrong log. Here the log of this flight.

Hello,

that is sad. Could you let me know more details about the model?
What receiver you are using and where the ESC is connected?

Because log does not contain Receiver signal lost event it mean that the unit does not activated a failsafe and also that receiver signal was good.
No, the GeoLink can't activate failsafe in any case. The only reason for failsafe is when receiver signal is lost for over 2 seconds.

Did you heard any beeps from motor when the model was on the ground?

Were you able to still control the model when the model crashed?
According the log it should all work.

I fear that the motor cutted the power because overcurrent protection.

GeoLink data corruption is not an issue when it is in the log for 1-4 times. It can be there because of static electricity, but still looks normal.
But if it is there more times there is some real problem.

Can you tell me what ESC you are using and if you know how overcurrent or low voltage protections are configured?

_________________
Spirit System developer

Trank You for your immediate answer. The Receiver is a Graupner GR-16 with digital Signal output (SUMDOF10), ESC a Hobbywing Platinum V3.0 100A. I cant say whether steering was possible - the model was hovering before motor cut an lost height exactly vertical. Low voltage was set to middle, so 3,15V/cell. With my 6P configuration the voltage of cut off should be at 18,9V. The minimum voltage was 22,7 V (loggen). So no cut off should happen. Checked all logs of the transmitter- no signal loss, no receiver reboot. How could this crash happen ?