Freestyle quad motor stop after takeoff.

[Jlarson0024]

Hi,
I have just built an FPV freestyle quad from a Troncat fpv video called, "How to build a 6s freestyle drone for under $200".
This quad has a Speedybee v3 stack and has had a random takeoff issue I cannot figure out. Once the quad is armed it will slowly throttle up until it lifts off the ground and once it hits 1/4 throttle the motors will cut off. Any help on this issue is greatly appreciated. ( I will post a video link in the comments.)
Thanks!

 

[Jlarson0024]

https://share.icloud.com/photos/03fhWO0AJ-Ma3dujovtAngp-Q

 

[FlyerInStyle]

Hi,
I have just built an FPV freestyle quad from a Troncat fpv video called, "How to build a 6s freestyle drone for under $200".
This quad has a Speedybee v3 stack and has had a random takeoff issue I cannot figure out. Once the quad is armed it will slowly throttle up until it lifts off the ground and once it hits 1/4 throttle the motors will cut off. Any help on this issue is greatly appreciated. ( I will post a video link in the comments.)
Thanks!

check n betaflight what your arming motor level is set to

 

[LitterBug]

Could playsibly be a cold solder joint that can't pass enough current to run all the motors past 1/4 throttle. Could be a battery sagging causing the voltage to drop. Could be vibrations causing the gyros/accelerometers to give bad data causing the quad to disarm. Could be any number of things.

Do you have a beeper and/or LEDs that provide error data? What are you using for your radio gear? Do you have telemetry configured to see what errors may be happening, and what battery voltage is?

LB

 

[Bricks]

Darn I had this problem before about 3 years ago it was programing in the radio for me but for the luv of me cannot remember exactly what it was.

What does your radio screen show for throttle travel? Did you calibrate ESC`s?

 

[Houndpup Rc]

Hi,
I have just built an FPV freestyle quad from a Troncat fpv video called, "How to build a 6s freestyle drone for under $200".
This quad has a Speedybee v3 stack and has had a random takeoff issue I cannot figure out. Once the quad is armed it will slowly throttle up until it lifts off the ground and once it hits 1/4 throttle the motors will cut off. Any help on this issue is greatly appreciated. ( I will post a video link in the comments.)
Thanks!

Oh, so cool! I have watched that video and want to build one for myself! (my project for next year!)

 

[TMAD]

After watching the video I thought of one thing. In betaflight I would calibrate the gyro and make sure that when you move the quad in each direction that it moves the same direction on the screen. If not you have to change the gyro orientation. If it is incorrect betaflight will see this as a runaway and disarm the motors automatically.

 

[Jlarson0024]

Could playsibly be a cold solder joint that can't pass enough current to run all the motors past 1/4 throttle. Could be a battery sagging causing the voltage to drop. Could be vibrations causing the gyros/accelerometers to give bad data causing the quad to disarm. Could be any number of things.

Do you have a beeper and/or LEDs that provide error data? What are you using for your radio gear? Do you have telemetry configured to see what errors may be happening, and what battery voltage is?

LB

I have a TX16s With Expresslrs. The beeper does work and I tested it with a 3s battery and it is showing the correct voltage. I am going to check the accelerometers in a few hours after I get Betaflight to work on my computer. It keeps giving me serial port issues.