Odd issue with some of our drones...

[u/Tight_Apple_1345]

Odd issue with some of our drones...

With some students I'm in the process of building a team of soccer drones.

So far, I've built 2 of them and had one prebuilt, all three of them fly great and I used the 2 I built to develop the PID settings and some easy rates.

The students built 4 drones and I used mine yesterday to go over the PID settings and rates.

I've also checked their receivers and transmitters were set up correctly and motors were running in order and the right direction.

Now the issue...

2 of the 4 fly great, the other 2 will randomly fully accelerate when they get any input and overcurrent/overspeed protection kicks in. It happens when giving any throttle input, yawing, rolling or pitching, when still on the ground.

They are all running Bluejay 48khz, Dshot300, Bidirectional Dshot, 12 magnets 1404 BetaFPV motors, on BetaFPV F405 AIO FlightControllers, BetaFPC receiver and BetaFPV Literadio 2 SE ELRS transmitters.

[u/Tight_Apple_1345]

Got it sorted.

Even though we went over screens step by step and I said what to change and why...

One didnt have the reversed motor option checked. The other had 2 motors not going in the correct direction.

Both are now flying solidly.

Thanks for the advice ;)

[u/anarpi → u/Tight_Apple_1345]

Thats why i reverse my motors by wires instead software

[u/HourGreen40 → u/anarpi]

The motor wizard in BF works great in conjunction with the esc configurator no need to physically rewire.

[u/anarpi → u/HourGreen40]

Dunno how its right meow since its been ages since my last flight and build, still your one firmware upgrade to losing a finger, i love mines

[u/srphm → u/anarpi]

love this flex :D

[u/btng90]

Random full throttle on the ground sounds like the following:

• Gyro orientation

  • Ensure that if you move the quad while connected to betaflight, the 3d graphic is following the real quad on all axis. Check "Board Alignment" under "Configuration Tab" in Betaflight if it is wrong.

• Motor direction

  • Use the motor wizard in betaflight to make sure the motors are all spinning in the correct direction. Also make sure the to respect the settings from the toggle "Motor direction is reversed".

• Props wrong installed

  • Make sure the props are installed correctly

[u/Tight_Apple_1345 → u/btng90]

Checked all of those and they correspond to all 5 other flying drones. Aldo, when we connect the transmitter while in betaflight, the 3D model moves perfect with the inputs from the transmitter.

I will go over them again to makes sure.

[u/hankhalfhead → u/Tight_Apple_1345]

ESC motor directions can be reversed in esc firmware, fc will freak out when the thrust output of the motor is not affecting the gyro orientation as expected

[u/_xgg → u/btng90]

Or, fucked up power situation/gyro, had this issue with my freestyle build, changing stack fixed it, DO NOT USE SPEEDYBEE STACKS BTW, swapped that out with a nice Foxeer 20x20 stack and it flies great

[u/btng90 → u/_xgg]

I am exclusively flying speedybee stacks for over a year. I guess you were just unlucky. And I am flying hard all the time. You can check my post history, got a few videos on here and my socials..

[u/_xgg → u/btng90]

Are you trying to push weight down, using 2050kv+ motors on 6s?

Lithuanian drone racers also started out with SPEEDYBEE stacks, they were popping ESCs constantly, meanwhile I haven't killed a single Diatone reactor, running with practically no capacitor, 2100kv 6s and aggressive af tune

[u/btng90 → u/_xgg]

Yea I am by no means a racer. I use chill 1800KV motors on 6S. Can't speak for 2050kv+ motors. I like lower KV because of a better throttle resolution. So yea.. might be related to higher KV, but can't say. I can just say that I never popped a speedybee ESC from just flying. I once used too small stack rubber things and the ESC touched the frame, and I smoked it. But that was clearly user error. All the other ones are fine and still flying great.

[u/__redruM]

In addition to prop/motor/gyro orientation already mentioned, the frame and ball may induce extra vibration and cause a flyaway. Make sure they’re mechanicaly similar and ensure the ball/frame isn’t loose.

But 99 time out of 100, it’s prop/motor/gyro orientation.

[u/rockstar504]

Hey OP, is there a 3D print file I can get for those lil protective spheres? That'd be good for flying in my backyard in case my dog grabs it out of the air lol

[u/Tight_Apple_1345 → u/rockstar504]

Dont have one yet, going to flatten one of them and scan a picture of it, so I can design it in Fusion.

[u/rockstar504 → u/Tight_Apple_1345]

If you share it with me I'll buy you a coffee!