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Questions tagged [quadcopters]

A multirotor that uses four non-coaxial motors/propellers to fly.

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5 votes
1 answer
2k views

Betaflight with Mamba F405 MK2 stack 40A ESC's and XING-E 2207 motors problem

I build a quad using Mamba F405 MK2 stack 40A ESC's and XING-E 2207 motors. Here are some pictures of my configurations on Betaflight and BLHeli Configurator: https://i.sstatic.net/kOr9L.jpg Also ...
VAAA's user avatar
  • 225
6 votes
2 answers
119 views

Are these methods of Drone Localization Techniques for a dark environment plausible?

I am working on a project where I need a quadcopter to accurately know its location relative to a starting point in a GPS denied environment in the dark. A quick overview of the project: The drone ...
Nathan's user avatar
  • 61
3 votes
0 answers
69 views

What is the frame system defined for Orientations comptutation using Quaternions [Madgwick filter/ Mahony filter]?

I am working with MPU9250 and I have implemented attitude & heading reference system based on Madgwick/Mahony filter. I capture the raw data [accel, gyro, mag] and pass to the Madgwick filter in ...
TheLazy's user avatar
  • 451
7 votes
2 answers
273 views

Vertical Flight Paths

I've been searching around for software to allow a vertical flight plan. For example I want to flight 50m across a building at 20m AGL. Then drop 1m and fly back 50m. So on and so forth. I've read a ...
Binx's user avatar
  • 153
4 votes
1 answer
860 views

Why don't solutions exist for a 3-axis helicopter flight controller?

So I've been searching around for a 3-axis flight controller for my 450-size helicopter. It seems that nearly every flight controller which is sold today is configured for solely the control of quad/...
tuskiomi's user avatar
  • 142
5 votes
1 answer
81 views

Quadcopter Stability Modelling

We know software like XFLR5 to model fixed-wing aircraft to determine aircraft dynamics and stability. Is there any software which we can model our quadcopter geometry in so we can know it's CoG, ...
IFX21's user avatar
  • 51
2 votes
1 answer
106 views

F450 frame all legs are not stable

I have one of the so called popular F450 frames. Not the original dji one, but chinese part. Now, I have assembled motors and ESCs. The assembling process was harder than it should be, probably ...
muyustan's user avatar
  • 121
3 votes
0 answers
79 views

What are the steps to connect the Pixhawk to Auvidea J120 board using a telemetry cable?

I'm looking to get a connection between my Pixhawk and Onboard GPU using telemetry. However, it doesn't seem to be connecting for some reason. I followed the instructions given on this page - https://...
desert_ranger's user avatar
6 votes
1 answer
178 views

Is WiFi drone control protocol standardized?

I'm searching for an app to control a Zerotech Doby drone. The official app "DoFun" is no more available, but surprisingly it works with another Chinese app "FlightGo". I wonder if ...
PatrykK's user avatar
  • 63
5 votes
1 answer
95 views

What is a good 3'' BNF that can be used indoors and outdoors?

I am looking to get a new quadcopter that will work in a variety of places. I want it to be a 3'' drone so that I can fly it both outside and inside. I would prefer if it had prop guards or ducts of ...
Jacob B's user avatar
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5 votes
2 answers
628 views

Will this set up fry my components?

Frame: Carbon fiber 250mm Motors: 2300Kv 2204 Power board: Matek built in BEC’s 12V + 5V FC: CC3D ESCs: HLGRC 30A opto (no BEC) Battery: Turnigy Graphene 14V 75C 4S Receiver: Turnigy iA6B My question ...
Kyle's user avatar
  • 51
5 votes
1 answer
150 views

Finding a ready-to-fly Taranis compatible, Eachine compatible, S4 compatible under 200€ drone

The question I'm looking for a drone under 200€, preferably 5" (as that's what I'm used to) but other sizes are ok, that can be purchased/delivered to France, is compatible with a Taranis X7 and ...
Mathieu VIALES's user avatar
9 votes
2 answers
6k views

What are the benefits to different types of frame arrangements?

When looking at different frames, there are lots of descriptions for different ways the arms are set up. Are there objective descriptions of how these arrangement change the flight characteristics ...
Carbon Soar's user avatar
4 votes
1 answer
577 views

How do you use the PID controller to compensate for a higher weight?

How should you adjust the PID values if you add weight to a quadcopter (For example a GoPro), so that the flight characteristics stay as close as possible to how they were before? I assume that the ...
Hannes Hultergård's user avatar
3 votes
3 answers
304 views

Wired drone using very high voltage?

For those of you who don't know: electricity can be "stepped up" to carry the same amount of power over a thinner wire, over much longer distances with minimal losses. Once the power reaches the ...
Botspot's user avatar
  • 133
4 votes
1 answer
103 views

Suitable ready-to-fly micro copter for a beginner

I read several docs on the ardupilot website, in particular about building a copter. It was suggested that total newbies (like me) should buy a small inexpensive copter first and learn how to fly/use ...
user1876484's user avatar
6 votes
3 answers
2k views

How to determine the lowest safe ESC current rating for a drone build?

I was planning to build a quadcopter and was wondering how I should decide what ESC to get. I'm asking about ESC current ratings. I am building a 7 inch drone using 4s with 2306 1900Kv motors. I have ...
Jacob B's user avatar
  • 5,792
6 votes
1 answer
540 views

Quadcopter rotates too slow

When I flew my drone yesterday, all the manoeuvres I did felt really slow. I then went into the OSD and changed the rates a bit. The drone then acted as it should, but when I then changed back it ...
Hannes Hultergård's user avatar
3 votes
1 answer
1k views

Serial Communication Not working in APM 2.8

I have being trying to establish Serial Communication connection between APM 2.8 and Raspberry Pi Board. But the connection is not being recognized in the Raspberry Terminal Console. Configuration ...
hitesh_a_h's user avatar
6 votes
2 answers
131 views

How to pick parts for a quadcopter flying on Mars?

So let's say I wish to build a quad to fly a GoPro around in Mars. How should I go about planning the build (target AUW [all-up weight], motor to motor distance, propulsion & power system, etc.)? ...
3k-'s user avatar
  • 439
5 votes
1 answer
212 views

How to clean dirt out of my miniquad motors?

I accidentally crashed my 250 class quadcopter into the dirt today and got dirt all over it, including into the motors. I managed to clean the dirt off of the frame and electronics, but I have no idea ...
ifconfig's user avatar
  • 6,008
1 vote
2 answers
2k views

How to prevent an ESC from overheating?

I have a 5-inch drone with individual ESCs on the arms of the frame. The ESCs tend to get very hot (somewhere around 70°C) and I'm not sure what is causing this and how to keep them cooler. Are there ...
Jacob B's user avatar
  • 5,792
18 votes
3 answers
5k views

Why are quadcopters inherently unstable?

I have heard it mentioned that quadcopters are inherently unstable and only become stable due to control. What does inherently unstable mean in this context, and why are quadcopters inherently ...
Jacob B's user avatar
  • 5,792
13 votes
5 answers
9k views

Why do most drones have upward facing motors?

Most freestyle quadcopters I have seen are specifically designed to fly with the motors facing upward and have the arms of the drone underneath the propellers like this: As you can see in the picture ...
Jacob B's user avatar
  • 5,792
5 votes
1 answer
2k views

What mission planner should I be using for INav?

I'm new to the quadcopter community and am looking to plan my first mission for my drone. As far as I can tell, the recommended mission planner is an Android app? I am hoping there is a good ...
James Milligan's user avatar
2 votes
1 answer
1k views

How do ducted fans impact drone performance?

There are many drones available which use ducted fans as opposed to open propellers. How does a ducted fan quadcopter differ in performance from an open-prop quadcopter? Note: the other question ...
Jacob B's user avatar
  • 5,792
5 votes
1 answer
9k views

How does the center of gravity affect a quadcopter?

I have heard a lot about center of gravity for fixed wings, but very little about the CG in quadcopters. How does moving the CG forward or backward impact the flight characteristics of a quadcopter? ...
Jacob B's user avatar
  • 5,792
6 votes
4 answers
2k views

How does frame stiffness affect a quadcopter?

When choosing a frame for a drone, something I hear mentioned occasionally is how flexible the carbon fiber is. It seems that the general opinion is: more flex in a frame is worse. How would having a ...
Jacob B's user avatar
  • 5,792
7 votes
2 answers
586 views

Is it a good practice to use a throttle limit of 90% for racing builds?

I had read somewhere that it's a good idea to set a throttle limit of 90% for racing. The reason given was that, in the last 10% of the throttle, the cost/benefit ratio for power to thrust would not ...
Schome1's user avatar
  • 1,226
3 votes
5 answers
322 views

How to determine the largest LiPo I can use in a quadcopter?

Multirotors can usually operate with a larger battery than recommended for longer flight times but slightly less performance. However, there is a point of diminishing returns at which increasing the ...
Jacob B's user avatar
  • 5,792
4 votes
2 answers
455 views

What impact does a shroud have on the torque produced by the prop(s) of a multirotor that incorporates a properly designed shouded propeller?

Based on the research presented here: "Hover and wind-tunnel testing of shrouded rotors for improved micro air vehicle design" and other reading that translates similarly well-designed shroud and ...
HansenJC001's user avatar
6 votes
2 answers
347 views

How does a quadcopter flip without falling very much?

I have a quadcopter and it has a flip function (as do many other quadcopters). I was wondering how this works. Say I am flipping it right (clockwise), I assume the motors on the left spin much faster ...
user avatar
9 votes
2 answers
2k views

Why do a quadcopter's opposite rotors spin in the same direction?

All the quadcopters I've seen have four motors, arranged in a square-like shape. Two of these rotors spin one way, and two of them spin the other way so that the main body of the quadcopter doesn't ...
wizzwizz4's user avatar
  • 265
4 votes
1 answer
1k views

What's the purpose of airmode and idle up?

What are airmode and idle up and what do they do improve my freestyle flights?
ifconfig's user avatar
  • 6,008
9 votes
5 answers
898 views

How to clean a drone?

I was just flying my drone when I crashed in some tall grass and there are now a bunch of grass bits all over the drone. How can I clean the drone without damaging it?
Jacob B's user avatar
  • 5,792
4 votes
1 answer
296 views

What is RPM filtering in Betaflight?

I've seen a lot of buzz lately about the supposed advantages of using the RPM filtering option introduced in Betaflight 4.1. What is it and how does it improve inflight smoothness?
ifconfig's user avatar
  • 6,008
8 votes
2 answers
1k views

Can I configure Betaflight in the field without using a laptop?

I often find myself wanting to make adjustments to the settings on my quadcopter in the field, especially when tuning PID settings and rate profiles. I currently bring a laptop with me wherever I go ...
ifconfig's user avatar
  • 6,008
7 votes
1 answer
513 views

Which settings in Betaflight allows me to do flips and rolls?

I see a lot of people flipping and rolling their quads, but on my last attempt, it fell out of the sky. What are the settings in Betaflight that allow them to do this without stopping the motors?
Apache64's user avatar
  • 121
5 votes
3 answers
77 views

Keep quadcopter steady when taking a video

Whenever I take a video on my small quadcopter, it’s never steady. It always bounces up and down a bit rather than keeping level. How can this be stopped/prevented?
user avatar
18 votes
4 answers
5k views

How does a quadcopter yaw?

I've always wondered how a quadcopter actually yaws, when all propellers are horizontal. I know that two of the motors spins faster, but I don't understand how that generates thrust in the horizontal ...
Hannes Hultergård's user avatar
1 vote
2 answers
414 views

How can I build a drone similar to a DJI Mavic 2?

I want to build a drone with the same functionality as a DJI's Mavic 2. Are there any books/videos/guides available? What would be involved? I need a flying machine that: has a good enough camera ...
user avatar
8 votes
1 answer
97 views

Quadcopter return to home function not working

I have a small S49 quadcopter. Whenever I am flying it and initiate Return to Home on the controller, it always returns to the wrong location compared to where it launched from. Sometimes maybe 5/10 ...
user avatar
4 votes
2 answers
173 views

Quadcopter getting hot after a flight

I have a small quadcopter and after around a 10 minute flight, I can feel it gets very hot. Is this normal?
user avatar
4 votes
1 answer
54 views

Kk2.1.6 falling in mid air and losing control

I am recently flying my DIY quadcopter built with lightweight aluminum bars and a kk2.1.6. It was a very good experience until it suddenly started losing control and it fell midair. It tried to gain ...
Himanshu Mahara's user avatar
11 votes
2 answers
772 views

Freshly built quadcopter/drone flips on takeoff

I just finished building my first quadcopter/drone and it flips when I try to take off. What could be wrong? What troubleshooting steps should I take to fix it?
tavis's user avatar
  • 751
9 votes
5 answers
169 views

New Prebuilt Drone flipping on takeoff

I have a small quadcopter drone, immediately on takeoff it flips upside down, this happens all the time. What could be a potential problem? Edit: It is prebuilt and bought from a shop and has never ...
user avatar
7 votes
3 answers
1k views

What process should I use to ensure my motors are spinning the correct direction when using Betaflight

I heard that a lot of problems occur due to one or more motors spinning the wrong direction. What process should I take to ensure that all my motors are spinning the correct direction if I'm using ...
tavis's user avatar
  • 751
10 votes
4 answers
675 views

Why did a quadcopter in vertical descent appear to lose thrust and descend rapidly?

Towards the end of a flight with a quadcopter, I started a vertical descent to come in and land. There was no wind on that particular day so I just came straight down. Shortly after starting to ...
Daniel Ballinger's user avatar

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