Hello,
Can someone please help identify the cause of this crash from the log file?
The aircraft switched modes and eventually fell.
Battery voltage and RTL events are visible in the log, but I want an expert view on the root cause.
Link attached below.
Thank you.
Here is the link https://drive.google.com/file/d/1LsgiYZV20V52xeCY0OssGqBEmz1kptzU/view?usp=drivesdk
Thankyou
So this means it crash because battery voltage drop suddenly not because PILOT cancelled
The RTL when it triggers
It had a battery failsafe well before the vent showing here which went to RTL. The pilot switched to Loiter and kept flying it looks like to me. Until the end…
Thanks for your reply.
I put link from the company give me can you help me to find out it’s true or not.
Looks to me like @dkemxr and the report are saying much the same thing. Battery voltage went too low, and the pilot continued to fly despite the warnings and fail-safes.
Thanks for the reply BUT REPORT SAYS THAT PILOT CANCELLED 2ND RTL.
The report looks accurate to me. Some of your battery related parameters are wrong for a 12S system. Critical voltage is too low and the Battery Voltage Compensation parameters are not right.
Neither really mattered in this case but they should be addressed immediately. And update the old firmware but perhaps you are just following some manufacturers bad advice in this regard.
Thank you for telling me.
Yes, I think we’re saying the same thing.
So this means it’s menufacture mistake. That’s why 2nd Auto RTL trigger delay when bettry losse the voltage and RTL not work.
The drone had a battery failsafe, and went into RTL. The pilot switched back to loiter and continued to fly. Doesn’t seem like a manufacturer issue to me.
Menufacture tell there is 2 fail safe trigger. And tell you can avoid one if you want.
Your pilot canceled both failsafe actions and flew it until it crashed. This is 100% pilot error (of the most basic kind), and the manufacturer’s report is accurate.
The report is also quite damning, and you should have a close look at how you conduct future operations with regard to safety of both equipment and personnel.
There are.
BAT_LOW_VOLT which is set for 44V
BAT_CRT_VOLT which is set at 23.4V
You can avoid and or ignore the low voltage failsafe for a short period of time, yes, that is fine.
Completely ignoring it will cause the results you experienced.
So that’s mean Battery critical warning set wrong
There is only ONE AUTO RTL CANCEL. 11.56 sec.
2nd is menuly RTL 12.16sec. but the battery critical failsafe is triggered 21.59sec approx. Time is when the drone flying. But bettry critical failsafe not set properly. When 2nd Auto RTL trigger battery voltage is already drop. If bettry critical failsafe set properly drone TRIGGER THE RTL and everything is fine.
Yes. 23.4V as a critical voltage for a 12S battery will do nothing useful, it’s crashed by that time. But, this doesn’t excuse the previous events cancelling FS RTL and continuing to fly.
FWIW, these are also wrong for 12S power:
MOT_BAT_VOLT_MAX,25.2
MOT_BAT_VOLT_MIN,22.2
Read and heed the advice given here as well as within that report. Your actions during that flight appear quite irresponsible, regardless of exactly how many failsafes were ignored.
