the quad was flying very nice and suddenly fall out from the sky i try to analyze the log file but there is no error messges so i check the log for any problem i find that esc telemetry stops at the moment of the quad start falling all other data was still logged, I apprecite if anyone can check the log and know why it fall from the sky.
FC stack holybro H7 with metal tekko 65a metal Esc battery used is 6s 6500mah 65C and motor velox 3008 1350kv with 8040 prop.
I’m going to guess an ESC failure on the front motors based on your output configuration. (RC3 - Motor 1) and (RC1 - Motor 3). The current at that moment dropped to min as well so in spite of the high command on those channels, nothing was happening.
But I test all motors now working fine or iit is a temporarily fail then become OK after!
ESC de-sync could have been the issue. And it would explain why they are working fine now.
OK I read about this issue before but never happened in all my previous tests even when I reach max throttle and speed to 182kmh I decrease currently max angle from 7500 to 6000 and and speed max to 145 kmh so what is the recommend solution now in your opinion?
What FW are the escs using?
Those ESCs run BL Heli 32 firmware.
That FW has a lot of parameters. If set incorrectly can lead to desync.
You have not shown us the parameters form the BL Heli firmware. We can not help you.
Have you considered hiring an external consultant?
Actually I didn’t play with original parameters of BLHeli and it was flying amazing several flights that happened suddenly one time and new thing this time that Both FC and ESC are enclosed this time I thought it’s not enough cooling but I ask first may anyother hidden reason.
Battery used 6s 6500 mah 50C
Motor T-motor Velox 3008 1350 kv
propller 8040
FC Holybro stack H7 -ESC tekko32 metal 65A
I’ve used the Tekko32 65A Metal with big payloads before, but not those high speeds, they work well.
I set these for the bigger motors:
The Auto motor timing might make a difference, BLHELI32 is quite “smart” and can track what your motor requires.
Very nice detailed video. Great find!
Yes it does, especially if the limit was 140
You need either passive or active cooling. But you definitely need that if you want to use the escs for long flights
Thank you fo that video find Edfeeoc
Your are welcome and this one also help
Have book marked both Ardupilot is deff the bestest for help and support I hope all your probs are solved and good flying
Really your ESCs should not be getting that hot. Either you are trapping heat around them or there is some problem either mechanical or with the tune
