Hello all,
We are a commercial operator with multiple pilots and a wide variety of aircraft. We have been flying this H for 14 months or so with only minor issues (mainly pilots tipping it on landing). Last week, one of our newer pilots had one of our H's fly off uncontrolled on the second flight of the day. In his words it took off fine but then flew off on its own. He claims to have done a compass calibration and my limited investigation skills with the telemetry data back this up. He also believes the aircraft did respond when he put it in Return to Home Mode but that after it reversed direction it flew a short ways and went into a tree barely missed on its free flight trying to leave town... He said it looked like it was following the same path in reverse
What I would like to do it get more info on the telemetry data specifics. I need a decoder ring so I can verify a few things. I did find one document (made for the 4 blade Typhoon) on this forum that had several details and explained many of the parameters but was missing a key item, specifically the position of the collision avoidance switch.
My concerns are that that the aircraft did not ascend to the return to home altitude and the obstacle avoidance did not avoid the trees. I am unsure of the Obstacle Avoidance switch position so that could be all on the pilot but the return to home altitude should have been ok. It is on our checklist and I was able to verify that it was still set at our standard height. there would be no reason for him to change this. From what I could see, there were some odd responses from the radios "rssi" (which typically stands for Received Signal Strength Indicator in the RF world). It would bounce from a normal signal -33 for example to 0, every several measurement cycles which I assume is no reading at all or an error because it would not go to exactly 0 over and over again. the start of this behavior on the timeline does match when the aircraft started to fly away.
I also found some errors or unusual responses from one parameter that should be compass errors according to the notes I found. So my thoughts are a compass failure, which fits my pilots description of how it was flying away forward, sideways, forward etc.
I would like to find out the different ways people review the flight log files. I was able to piece a story together based on excel pivot tables and charts but there has to be a better way. I found an app out there but I no longer have the controller and it looked like that app was designed to be used on the tablet/ST16
I understand there is a warranty period for all things but man that sure is frustrating if this turns out to be an equipment failure. I put a screen shot of the data below. sorry if its too small to read...
That's enough for now.
To summarize my questions,
1. Is there any documentation on telemetry parameters with detailed descriptions so we can diagnose the log files?
2. What are the "best" or more common apps used to review the telemetry data or visualize it?
Thanks in advance
We are a commercial operator with multiple pilots and a wide variety of aircraft. We have been flying this H for 14 months or so with only minor issues (mainly pilots tipping it on landing). Last week, one of our newer pilots had one of our H's fly off uncontrolled on the second flight of the day. In his words it took off fine but then flew off on its own. He claims to have done a compass calibration and my limited investigation skills with the telemetry data back this up. He also believes the aircraft did respond when he put it in Return to Home Mode but that after it reversed direction it flew a short ways and went into a tree barely missed on its free flight trying to leave town... He said it looked like it was following the same path in reverse
What I would like to do it get more info on the telemetry data specifics. I need a decoder ring so I can verify a few things. I did find one document (made for the 4 blade Typhoon) on this forum that had several details and explained many of the parameters but was missing a key item, specifically the position of the collision avoidance switch.
My concerns are that that the aircraft did not ascend to the return to home altitude and the obstacle avoidance did not avoid the trees. I am unsure of the Obstacle Avoidance switch position so that could be all on the pilot but the return to home altitude should have been ok. It is on our checklist and I was able to verify that it was still set at our standard height. there would be no reason for him to change this. From what I could see, there were some odd responses from the radios "rssi" (which typically stands for Received Signal Strength Indicator in the RF world). It would bounce from a normal signal -33 for example to 0, every several measurement cycles which I assume is no reading at all or an error because it would not go to exactly 0 over and over again. the start of this behavior on the timeline does match when the aircraft started to fly away.
I also found some errors or unusual responses from one parameter that should be compass errors according to the notes I found. So my thoughts are a compass failure, which fits my pilots description of how it was flying away forward, sideways, forward etc.
I would like to find out the different ways people review the flight log files. I was able to piece a story together based on excel pivot tables and charts but there has to be a better way. I found an app out there but I no longer have the controller and it looked like that app was designed to be used on the tablet/ST16
I understand there is a warranty period for all things but man that sure is frustrating if this turns out to be an equipment failure. I put a screen shot of the data below. sorry if its too small to read...
That's enough for now.
To summarize my questions,
1. Is there any documentation on telemetry parameters with detailed descriptions so we can diagnose the log files?
2. What are the "best" or more common apps used to review the telemetry data or visualize it?
Thanks in advance
