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12 votes

Freshly built quadcopter/drone flips on takeoff

There are several things that can be causing this with different likelihoods. The first thing to check is - are your propellers on correctly? It is an easy mistake to make and always worth a check. ...
Drones and Whatnot's user avatar
10 votes
Accepted

Can a receiver get damaged if you power it up without an antenna?

Running a receiver without an antenna should not cause any damage to the receiver, as no RF power is sent to the antenna (if your receiver has an active antenna there may be a DC bias present, but ...
Kralc's user avatar
  • 6,036
7 votes
Accepted

Motor will not go above half thrust. Why and how to fix?

This sounds very much like like a PWM/analog ESC miscalibration issue to me. PWM ESCs required signal calibration to ensure that both the RC receiver and the ESC are on the same page about what kind ...
ifconfig's user avatar
  • 6,008
6 votes
Accepted

One motor on quadcopter broken

So this method will vary based on whether they are brushed or brushless motors. For brushed: Spin the propeller with your fingers - is anything actively resisting the motion? If yes, remove the ...
Drones and Whatnot's user avatar
6 votes
Accepted

How to keep my prop from flying off my motor?

It looks like you are missing a piece of the prop adapter. There should be three pieces, the nut, the central shaft with a thread for the nut on one end and a taper on the other, and a collar that ...
Robin Bennett's user avatar
5 votes

Drone wobble/bounce while flying

Try lowering your $D$ coefficients by $10$ in each direction. If that doesn’t help, slowly try increasing your $I$ coefficients. [Make sure you first implement (and TEST!) a kill switch any time you ...
pion's user avatar
  • 211
5 votes
Accepted

Grinding sound on FPV motor but no apparent damage

It looks like a bad phase to me. Check the resistance of each phase, wire 1 to wire 2, wire 2 to wire 3, and wire 1 to wire 3. If one of those is much higher resistance or shows no continuity, then ...
QuadMcFly's user avatar
  • 1,200
4 votes
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How to fix OSD flickering?

I know I'm a bit late to the party, but I just had the same problem as you and your solution didn't work unfortunately. What I instead had to do was connect a +5V wire from the regulator to the FC, ...
Hannes Hultergård's user avatar
4 votes

How to fix OSD flickering?

I fixed it by adding a common ground between the 5v regulator and the flight controller. I can't explain the science behind this, but I took the answer from this video from Painless360 The flickering ...
JoRouss's user avatar
  • 343
4 votes
Accepted

How to PID tune a 10" drone?

Disclaimer: I don't know anything of the following for sure, so be careful. Be very, very careful. The PID controller itself does not care whether it's a 5 or 10-inch quad. The PID gains, though, do ...
FlashCactus's user avatar
  • 2,997
4 votes

Beeper beeps if transmitter is turned of even if it shouldn't

After making sure that you have the RX_Loss beeper disabled, the next port of call would be to check your DShot config. It may not be the beeper that is making the noise - there is a DShot beacon ...
Drones and Whatnot's user avatar
4 votes
Accepted

Freshly built quadcopter/drone flips on takeoff

In my experience, the causes of this problem are (in order of probability ) One or more propellers are on wrong. One or more motors are spinning in the wrong direction. Flight controller ...
tavis's user avatar
  • 751
4 votes
Accepted

DJI Mavic Mini 2 can't record 2.7k 60fps after update

After a bit of research it seems like the problem is likely to be that you don't have the latest version of the DJI fly app. As per this forum thread you will need version 1.2.4 or later to see the ...
Hannes Hultergård's user avatar
4 votes

How to debug a non-working Eachine E010?

The beep from the transmitter indicates that it has linked successfully with the receiver on the drone, so at least part of the board is working. However without detailed knowledge of the design and a ...
Robin Bennett's user avatar
4 votes
Accepted

(Beginner) I have a Radiolink Mini OSD with a not so clear schematic. How do I know if it can handle the input voltage needed to power my VTX?

You don't need to power the camera and VTX from the OSD, it's just easier when everything runs at 5v because you can use a single 3-wire cable from one thing to another. Normally, power comes from the ...
Robin Bennett's user avatar
3 votes

Motor will not go above half thrust. Why and how to fix?

That could also be a lipo that has been over-discharged or for some other reason is just not able to provide as much current as it used to. The way to check (assuming you don't have a 'known-good' ...
Robin Bennett's user avatar
3 votes
Accepted

Video breakup problems with high power using The Force VTX?

This can be caused by too much heat building up in the VTX causing the electronics to suffer. Try mounting the VTX to have more airflow around it or put a heat sink on it. Sometimes a VTX just can't ...
tavis's user avatar
  • 751
3 votes

FS RX2A Pro Receiver Not Working

You mentioned that you tried SBUS, but that receiver only supports PPM and IBUS (not SBUS). Try setting your flight controller to use IBUS. As for the RX getting hot - I'm not sure about that. The ...
Schome1's user avatar
  • 1,226
3 votes

Does the LaForge V3 Fat Shark Receiver receive audio from VTX?

The V4 has audio, but I can't find any information about whether or not the V3 has it. I did however see that a manual mentions a VTX audio option in the menu. But since it doesn't say which version, ...
Hannes Hultergård's user avatar
2 votes

Image stutter in MAVIC Air 2 recordings

It's possible that the stuttering in your footage is due to a combination of factors, including low light conditions and the use of HDR mode. HDR mode requires the camera to capture multiple exposures ...
Viraj Sheth's user avatar
2 votes
Accepted

How to reset connection between drone and RC for MAVIC Air 2

In this case there is no way to reset the connection. It is a defective unit. I sent it back and ordered a new one. Result of chat discussion with @Daniil: I couldn't connect the drone to the RC nor ...
youngpilot's user avatar
2 votes

DJI FPV Air Unit mistakenly declares "slow card"

It appears that this issue where perfectly good and speedy SD cards are declared "slow" in DJI Air Units, as is documented on the DJI product forums. This is an issue for many DJI FPV system users.
ifconfig's user avatar
  • 6,008
2 votes
Accepted

How to recognize damaged brushless outrunner motors?

There are many signs that a brushless motor is broken or getting worn out. Something that can happen to motors that have been used for a long time is their bearings wear out. If you notice that the ...
Jacob B's user avatar
  • 5,792
2 votes

One motor on quadcopter broken

If the motor seems mechanically sound, and the wiring seems OK, first inspect for burnt windings or burnt FETs on the ESC. If the FET has burnt it may burn the 'good' motor, so don't plug a new motor ...
ctzsnooze's user avatar
  • 301
2 votes
Accepted

Why does motor not want to go above 2/3 thrust?

It was the battery. Bought a new battery, charged it, all 3 lights turned green, and motor/esc has no trouble going to full thrust. Lots of power now, so that should really help the plane fly. Problem ...
Ceramicmrno0b's user avatar
2 votes
Accepted

Loose drone propeller mount, flying off at high throttle

The piece with the threads on it should probably fit over the motor shaft (motor stick thingy) all the way down to the motor body. When tightened down the slots in the threaded piece should close up ...
Kevin's user avatar
  • 501
2 votes

Motor doesn't work, ESC doesn't calibrate

Well I found a really roundabout solution that sorta works. Turn the ESC on not connected to receiver. Turn Tx on with throttle at max. Plug ESC into receiver. Then I can calibrate the throttle and ...
ThatCoolCoder's user avatar
2 votes

DJI Mavic Pro Navigation System Error, After Crash

The issue was actually from the IMU not sending out commands! Had to replace the whole ESC board, and it worked, finally!!!
Cap. MH's user avatar
  • 51
1 vote

Connecting 2 Pixhawks to 1 Raspberry Pi

In Ardupilot there are parameters SYSID_THISMAV and SYSID_MYGCS that can be set to different values. This may only be helpful ...
Kevin's user avatar
  • 501

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