Copter Fell out of the sky

Yeah will have to check tomorrow. Its pretty late now for testing . Saving grace is that the props are not crossing over the scoop . We made it in a way it doesnt fall under the radius of the props

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You can, you can also get ESC fire

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so some update about what happened after my last update… all attempts to increase air flow failed. tried even cut opening the sides of the shroud around the FC and ESC stack to allow complete air flow but still the temperatures steadily climbed to 100 within a minute. thereafter i changed the ESC to a Zerodrag 75 Amps ESC with telemetry and current sensing and set up the copter again and flew it with the shrouds cut open on either side. This time too the temps kept increasing steadily and reached 150 and the ESC did a shut down. i was hovering pretty low so only the landing gear got damaged. i have downloaded the log and i am attaching the same… i am unable to find the cause as my ability to read the log is limited. i can see that all motor RPMs are almost the same https://drive.google.com/file/d/1zyHB60OTWhus8rg1mTbK_lWu71Ek6NsP/view?usp=sharing


any one any clues?

You need to enable battery monitoring to see how much current you’re drawing. You could ad active cooling like a fan or similar to get the air flowing.

If this is correct then no wonder you are dealing with temp issues.

Yeah that could be an issue… @atul_Dharan, maybe the drone is too heavy for the motor configuration? The motors you have looks like race drone motors or cine lifter motors. Do you have any manufacturer data on thrust and current draw? As well as the weight of your drone?

I have set up battery monitor as mentioned in the ardupilot documentation for matek H743 autopilot … BATT_MONITOR =4

Then reboot.

BATT_VOLT_PIN 10

BATT_CURR_PIN 11

BATT_VOLT_MULT 21

Im seeing current and voltage on Mission Planner

Hi
I saw that too . Maybe its correct . But my Hover throttle is only 0.18

I am using 3110 900kv Xing2 cinilifter motor with HQprop 10x5x3 props. I read somewhere that this set up is good only for light weight copters and mine has an AUW ( with payload ) of 3.4 Kg. Normally i have seen people flying this set up at about 2Kg weight ( the bare drone + a go pro or something light ) . Also i have mostly noticed people flying 6000 mah battery instead of an 8000 mah battery.

The manufatirer data for xing2 cini lifter 3110 900 kv only mentions test data for 7 , 8 and 9 inch props. Somehow they dont.recommend 10 inch props.

I.have prdered a 09 inch prop and expected to reach after three days.

Anotyer option is to swap the motors qoth a 3115 900 kv motor. I have seen that set up beng used for heavier drones

Any case i will experiment with both these set ups in ecalc. Will take a paid version today and check iy

This is certainly an issue with the motor-prop combination for that AUW

Would suggest a 3110 700-750kV for that propeller. Should give you better temps

As you mentioned, 3115 900kv motors are commonly used on 10” quadcopters. I have two 10” quads with those motors.

I based my build on this video by Hoarder Sam.

As you can see in the video, Sam’s quad flew just fine with those motors. Sam was surprised by how little current his quad required to fly.