Please help me to analyze my log
my drone is fixed wing homemade and using plane 4.3
after 3 succesed flight in each one hour flight…
it now crashed
please help to analyze what cause the crash
Sorry to hear about your crash. Please post the bin log on a file sharing site and link it from here. A picture or description of the plane would also help.
thankyou before @Earthchill
here i just uploaded to dropbox the fille log
so actually it crashed two times with the same case
pitch and desc pitch is diverged
but the battery seem not used because voltage is back to high again
thankyou for your help sir
So actually
My drone like skywalker 2014
But it is homemade with wingspan 2 meter
Fc is radiolink flight control pixhawk installed 4.3.3
Esc t motor 75A
Motor is sunnysky 3520 kv720
First second and third trial with flight time one hour is succesed with no problem
But it was crashed in 4 and 5 test
Fourth test is crashed
And log i upload is fifth test
From log i look, it is desc pitch and actual pitch become diverge suddenly
And batt voltage is likely there is no motor consumption because voltage is back to high again
But throtle command by auto pilot is high
What caused this problem can you help me
Pada tanggal Sab, 8 Apr 2023 01.16, Erik via ArduPilot Discourse <noreply@ardupilot.org> menulis:
The log shows that the motor current suddenly drops to about 5 amps. The aircraft slows down and starts to descend and ardupilot increases throttle output to maximum, but the motor/esc does not respond to its input signal. I would suggest testing the esc or motor as there is a fault.
2 Likes
Since it happens after quite some time flying, I would guess either overheating ESC/motor or that the prop got loose very slowly.
I don’t know enough to tell, but if you tell the prop size and pitch someone with more experience should be able to tell if the ESC/motor would be likely to overheat.
thankyou @jreise-d for your help
it is suprised that esc and motor failure that caused this crashed
because we use best motor and esc we can get from our country
ESC T motor 75A should be handle this drone but maybe with that current consumed by motor it can produced some heat
so maybe heat cut off has triggered to this system i build
but it is just my guess
thankyou for your help to analyze my log
for the first time of the crashed incident
my guess to this drone is because servo elevator failure
but further analysis shown that two crashed flight (it is 4th and 5th) is the SAME CASE
with curent go down,
voltage back to high level,
altitude go down,
servo elevator try to keep altitude with give command to up the elevator
may be overheating ESC / motor that is the real problem to my drone
the specification of my drone is
FC Radiolink installed with 4.3.4 arduplane
servo emax digital
gps radiolink m8n
battery tattu 16000mAh
esc T Motor AT75A
motor Sunnysky 3520 KV720
propeller APC 13 inch with pitch 6.5 inch
where to find temperature of ESC can produced with this composition of my system built??
i just realized that table test in sunnysky home page with 3520KV720 motor
can reach 69 degree celcius with only 48 Ampere
and in my system of drone, for take off it is produced about 55 - 58 Ampere
i just wondering how heat the temperature on the esc if the motor heat is 69 degree up produced
but where to find evidence that ESC heat cut off is the real problem ??
until now i dont connect to the battery yet because reparation of the body of drone
Arduplane can not log the temperature of your esc, because there is no telemetry data going from esc to the fc.
This esc has a temperature protection feature, which reduces power at 110° Celsius. I asume your esc is located in the fuselage and has not enough airflow for cooling. Place the esc outside the fuselage, that will help alot.