All Questions

Filter by
Sorted by
Tagged with
3 votes
2 answers
438 views

On a multirotor, how effective is braiding of power wires from the ESC to the BLDC Motor(s) in reducing or eliminate emf?

Assuming BLDC motors with the ESC positioned at the 'worst case' (furthest distance) with longest power wires between the ESC and the motor, will braiding these three wires reduce the EMF that would ...
HansenJC001's user avatar
4 votes
4 answers
726 views

Are there any extremely small brushless drone motors?

I have seen many tiny brushed drones, about an inch from motor to motor, and was wondering whether it would be possible to create a brushless drone that small. Are there any brushless motors available ...
Jacob B's user avatar
  • 5,792
6 votes
1 answer
468 views

Is voltage sag safe if the voltage isn't too low?

I know that a liPo cell should never be below 3.0 volts, but can voltage sag during high throttle maneuvers damage the battery excessively even if the voltage it not below that level? And if that is ...
Hannes Hultergård's user avatar
3 votes
1 answer
388 views

Mamba F405 gps loiter mode

I ordered a new mamba f405 a few months ago and I am curious whether it is possible to have loiter mode on Mamba f405 flight controller like one in pixhawk ?
Himanshu Mahara's user avatar
5 votes
1 answer
66 views

Quality of transmitted image and electrical problems

There is a question already regarding a flickering OSD, but I wonder how other image quality problems relate to electrical problems. What's the first thing one has to look for when the transmitted ...
3k-'s user avatar
  • 439
8 votes
1 answer
146 views

How to visually inspect the magnitude of PID gains?

The defaults in Betaflight generally work very well, but I own and fly very different quads ranging from 2" to 6". It may easily be that there is room for little adjustments I can make with the tuning ...
3k-'s user avatar
  • 439
3 votes
2 answers
2k views

What is the point of a dual-gyro setup for a FC?

When looking for a flight controller for a drone build, I have seen some FCs with dual-gyros. What is the purpose of having two gyros on a FC? (Are there any advantages or disadvantages)
Jacob B's user avatar
  • 5,792
2 votes
1 answer
2k views

How to charge LiPo batteries in series?

Is there any way to use my main charger, which can charge 2-6s batteries, to safely charge multiple 1s batteries in series? (assuming all of the batteries are the same capacity) How would I go about ...
Jacob B's user avatar
  • 5,792
5 votes
2 answers
2k views

What is a "mushroom antenna"?

In Can circularly and linearly polarized antennae be used together for FPV? I read about a "mushroom antenna". While I have very little experience with FPV drones I am generally experienced in radios ...
Phil Frost's user avatar
3 votes
3 answers
536 views

How to program drones that have old flight controllers?

I have a few components of drones like some old FCs and old ESCs and I don't want them to go to waste. Is there any way to configure a drone that I built with those parts, as I don't think the FCs are ...
Jacob B's user avatar
  • 5,792
5 votes
1 answer
984 views

How to fix OSD displaying weird symbols

I upgraded from betaflight 3.X to betaflight 4.1.X and now my OSD displays weird symbols. It seems to have replaced the crosshair. (The 3 L shapes in the center) Expected result: How can I fix it?
JoRouss's user avatar
  • 343
2 votes
1 answer
178 views

How does one wire an OSD-enabled external DVR into Fat Shark goggles?

I've recently bought an Eachine Pro DVR which I want to add to my trusty FatShark Attitude v2 goggles. Wiring the DVR to be able to record video is easy: just solder the DVR's video input wire to ...
FlashCactus's user avatar
  • 2,997
5 votes
1 answer
129 views

Would the FAA's proposed Remote ID really ground older drones?

The FAA has proposed new rules regarding drones, particularly Remote ID Remote ID would assist the FAA, law enforcement, and Federal security agencies when a UAS appears to be flying in an unsafe ...
Machavity's user avatar
  • 351
3 votes
2 answers
1k views

How do I calculate thrust for a quadrocopter?

I am designing a quadrocopter style aircraft that uses a 20 inch propeller 1.625 inches in width and has a pitch of 8 inches. How do I calculate static lift / thrust and the dynamic thrust / lift ...
Gabriel Kusiak's user avatar
4 votes
4 answers
2k views

How should one chose the correct motor KV for a build?

For a 5 inch, 4S build, the general advice is to go 2300-2750KV. For the same size but 6S, it should be ~1800KV. However the same motors could be used on a 4S 7 inch quad. And all of this scaling ...
Drones and Whatnot's user avatar
7 votes
3 answers
2k views

How to fix OSD flickering?

I just changed my Diatone R349 flight controller because the old one broke. On my first test flight, I noticed the OSD is flickering very bad, sometimes losing it for more than 1 second, even when not ...
JoRouss's user avatar
  • 343
5 votes
3 answers
4k views

What technology offers the longest range for RC controls?

After watching a video demonstrating a jet-powered RC aircraft, I started to wonder about the maximum range available with modern RC equipment. What is the maximum range currently available, and ...
End Antisemitic Hate's user avatar
5 votes
1 answer
1k views

Can I use LiHV batteries as normal batteries?

I have a small drone and the only batteries I can find that fit it are LiHV batteries. Can I use LiHV batteries like normal LiPo batteries? Can I just simply charge a LiHV battery to 4.2v and fly with ...
Jacob B's user avatar
  • 5,792
6 votes
3 answers
2k views

What happens if i select the wrong number of motor poles in BetaFlight?

what kind of effect has on my gear and flights to have set a different number of motor poles that I actually have installed. for example, my motors have 14 poles but I set 12 on BetaFlight or vice-...
Paulino Gomez's user avatar
11 votes
2 answers
5k views

Can circularly and linearly polarized antennae be used together for FPV?

I have a few spare antennae of mixed polarizations I'd like to be able to reuse for my FPV gear. Is there anything I need to know about incompatible configurations of mismatched polarizations ...
ifconfig's user avatar
  • 6,008
18 votes
8 answers
7k views

What is a good alternative to carbon fibre for a quadcopter frame?

I am making a diy quadcopter and I need a strong and light material for its frame. Carbon fibre is not available in my area. I have tried aluminium but it's too soft and so needs repairs. What ...
Himanshu Mahara's user avatar
7 votes
2 answers
282 views

Does the Meteor65 Acro support Spektrum RSSI?

I have a BetaFPV Meteor65 Acro with a built-in DSMX receiver. I'm wondering if the F4 1S Brushless Flight Controller V2.2 (DSMX) supports RSSI. I've seen DVR of people flying and they have an RSSI ...
2pacsawyer's user avatar
8 votes
1 answer
1k views

what HD cameras should be used and for what purpose?

I was looking for a camera the other day and I came across a few options. GoPro Session 5, Caddx Orca, Gopro Hero 8 Black, Insta360 One R, and the GoPro Hero 7 silver. I realize that these are all ...
jlettow01's user avatar
10 votes
1 answer
607 views

How to determine the correct specification of servo for a control surface

Servos come in a large range of sizes, torque values, etc. and the servo to use depends on a number of factors such as control surface size, aircraft speed and desired manoeuvrability. While there is ...
Kralc's user avatar
  • 6,036
8 votes
1 answer
839 views

What is the typical glide ratio of Kline-Fogleman airfoils?

Kline-Fogleman (KFm) airfoils, despite their seeming contradiction with known principles of aerodynamics, seem to be very popular in RC modelling, and are known to have a peculiar stall behavior, with ...
FlashCactus's user avatar
  • 2,997
10 votes
3 answers
432 views

How do you build and use a smoke stopper?

What is the right way to build and use a "smoke stopper" device to prevent a short or other improper wiring from damaging your electronics? Is it different depending on what voltage you are using?
5zero7rc's user avatar
  • 1,130
5 votes
2 answers
1k views

What is the performance difference between a brushless motor with a wider vs taller stator?

In the drone motor industry, there are a lot of variations in the stator sizes of brushless motors. There are several motors that have similar stator volume but one is wider and the other is taller. ...
Jacob B's user avatar
  • 5,792
6 votes
4 answers
872 views

What blocks an FPV video signal?

I am interested in long-range range FPV flying. What things block the video signal of a 5.8gHz video transmitter the most?
Jacob B's user avatar
  • 5,792
6 votes
2 answers
452 views

Can I salvage a 4in1 ESC?

I have a 4in1 Brushless ESC that only one ESC burned out on, but the rest should still be usable. Is there a way to salvage it and use a single ESC to replace the burned one or something? If so, how ...
Jacob B's user avatar
  • 5,792
4 votes
2 answers
1k views

What is the difference between a patch and helical antenna?

I have seen both patch and helical antenna when shopping for video receiver antennae. All I know is that they are both directional antennae. Do these types of antennae have any inherent performance ...
Jacob B's user avatar
  • 5,792
4 votes
1 answer
1k views

Why do most multirotors use outrunner brushless motors?

I've noticed that most every quadcopter drone I see uses outrunner BLDC motors like this: Why is that? What unique advantages to outrunners have that make them better than inrunners for multirotors?
ifconfig's user avatar
  • 6,008
5 votes
0 answers
740 views

Android Black-Box Viewer (Betaflight)

I'm using Speedy Bee (an Android betaflight configurator) a lot on the field for changing settings and tuning. I use a USB-OTG-Cable for my Android phone to connect to the FC. But I do miss an ...
heavykick's user avatar
  • 187
3 votes
1 answer
639 views

Are there any brushed outrunner motors?

The most common motors on drones are brushless outrunner motors. I´ve also seen some brushless inrunner motors. Are there any brushed outrunner motors? If so, why are they so uncommon?
user avatar
7 votes
3 answers
562 views

What is antenna gain?

As I understand it, generally, a higher gain antenna will result in a longer range and better reception for FPV flying. What is antenna gain? What makes a low-gain patch antenna different that a high-...
Jacob B's user avatar
  • 5,792
7 votes
2 answers
818 views

Calculating the range of an FPV drone

It's been a long time since I studied Electronics and Communications Engineering, but if I recall correctly, it should be possible to calculate an estimate for the range of an FPV drone given the ...
sempaiscuba's user avatar
5 votes
2 answers
223 views

Where do we download Betaflight Configurator and Blackbox Explorer?

I have picked up an older quad to get some experience in FPV flying. I'm not sure of the make or model of the quad - it doesn't seem to have a label. It does come with some printed instructions for ...
sempaiscuba's user avatar
5 votes
1 answer
246 views

How to recognize damaged brushless outrunner motors?

I would like to know how to recognize damaged brushless motors on a drone? What are the most common symptoms?
Ziem's user avatar
  • 579
5 votes
1 answer
1k views

What is DSHOT in ESCs?

I've heard that modern quadcopters use a DSHOT protocol. Could you describe what it is? What's its purpose?
Ziem's user avatar
  • 579
5 votes
2 answers
1k views

What is a turtle mode?

Could you explain what is a turtle mode? I'm wondering what the use of it is? Does it work on all quadcopters?
Ziem's user avatar
  • 579
4 votes
1 answer
306 views

What are the advantages or buying a small drone vs a larger drone? [closed]

I have been wanting to get into drones a bit more than i am right now for a while. In the case of drones bigger seems to be more expensive but what advantages does it have over a smaller drone, what ...
Topcode's user avatar
  • 149
2 votes
2 answers
479 views

Difference between XM and XM+ receivers?

I have seen both XM and XM+ receivers and am wondering which one would be better to get for a micro-drone build. What are the differences in specs? (range, reliability, weight, etc)
Jacob B's user avatar
  • 5,792
6 votes
2 answers
342 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
4 votes
3 answers
4k views

Why is 5.8ghz used for FPV and 2.4ghz use for transmitters?

Why do most VTXs use 5.8ghz and most transmitters use 2.4ghz?
Jacob B's user avatar
  • 5,792
1 vote
3 answers
2k views

Difference between T700 carbon frames and 3k carbon frames?

I have heard that iflight's Green Hornet uses T700 carbon instead of 3k carbon. What difference does the new T700 carbon make?
Jacob B's user avatar
  • 5,792
3 votes
1 answer
450 views

Differences between fiberglass-reinforced plastic and polycarbonate propeller materials?

What are the differences between drone props that are built from fiberglass-reinforced plastics and props made from polycarbonate?
Jacob B's user avatar
  • 5,792
2 votes
2 answers
3k views

How do I set up the RSSI readout on an XM+ receiver channel?

I have an old XM+ receiver that does not do RSSI. Some of the newer ones come with RSSI set up on a channel. How can I set up RSSI to be on a certain channel?
Jacob B's user avatar
  • 5,792
5 votes
1 answer
200 views

Can I use the trainer port on a DJI Phantom 2 controller for a buddy box connection?

I am trying to teach my wife how to fly drones, and as I have an old DJI Phantom 2 with two controllers, I wanted to buddy box her on it. I know there is a trainer port on both transmitters, but are ...
Apache64's user avatar
  • 121
3 votes
1 answer
474 views

Can you cancel an automatic landing triggered by a low battery on the Dji Mavic 2 Pro?

Whenever the DJI Mavic 2 Pro has a low battery it initiates a function that lands it. Sometimes this can happen when the drone still has a lot of battery capacity e.g. 45%. Is there a way to cancel ...
user avatar
5 votes
2 answers
325 views

Advantages to having more rotors?

I have a quadcopter drone, is there an advantage say of having a octocopter instead of a quadcopter. Will it improve performance?
user avatar
3 votes
1 answer
1k views

What happened to DSHOT1200 support in Betaflight?

I just went to update my flight controller from 3.5.3 to 4.1.0, and I noticed that some time in the past two years the option to enable DSHOT1200 was removed from Betaflight. Does anyone know why ...
ifconfig's user avatar
  • 6,008

15 30 50 per page
1
13 14
15
16 17
19