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2
votes
0answers
9 views

The Effect of Pitching Moment on Aircraft Stability

I'm designing a small RC plane and I'm currently at the first iteration of airfoil selection. I have converged to Clark-Y, NACA-2412, NACA-2415, and S-8036. In comparing the four, I noticed that all ...
2
votes
1answer
97 views

What is the most invisible obstacles to avoid and notice when flying a drone?

Now I am understanding one thing: there are two kinds of obstacles, in addition to the visible obstacles, such as trees, there are also invisible obstacles that will affect the flight of the drone. ...
-1
votes
1answer
29 views

Developing a long-range UAV [closed]

I want to develop an UAV, for that I would first like to know how to dimension the wing. I will draw it in solidworks.
1
vote
1answer
28 views

UAV classification

Is there a classification for UAVs? And based on the specs below, what type of UAV can that be classed as please? ...
2
votes
1answer
31 views

How to use real DJI controller in simulator

I've got a DJI Mini 2 and I'm aware their official application (DJI Simulator) does not support it. Anyway, I wonder if I can use the real Mini 2 controller in any third-part simulator. I'm more ...
3
votes
0answers
22 views

INAV beeps enabling NAVPOSHOLD?

I'm running a 500cm frame with 11" rotors. It flyes but the navigation modes seem to be a tip suprised, that INAV 3 seems to have some troubles, when I turn on the 3D GPS+baro position hold (...
2
votes
1answer
17 views

Which propeller for these motors for rc airplane

I am new to this hobby and I am looking to make a rc airplane myself but I am confused to buy which propeller for this motor? Shall i buy CW or CCW propeller Thanks, Paarth
3
votes
0answers
27 views

Is VIO a good solution for autonomous drone navigation at higher altiutues (200+ms)?

When it comes in indoor scenarios, VIOs may provide good performance, but when it comes to outdoor environments and high altitudes without proper GPS coverage/stability, are current VIOs capable of ...
4
votes
1answer
31 views

Using BMP280 as an altimeter for CanSat

Situation: Me and my student team want to use a BMP280 air pressure sensor connected to an Arduino Nano to measure the altitude of a CanSat. A CanSat is a coca cola can-shaped and can-sized aerial ...
0
votes
0answers
14 views

How shall I get smooth servo output from pixhawk?

I am getting improper servor output. A slight increase in throttle suddenly increases servo output of the pixhawk. This is the link to my servo output As this can be seen I get sudden jump from 1000 ...
1
vote
2answers
31 views

Which setup for tilting rotor quadcopter?

I'd like to build a quadcopter with rotors that can tilt to increase the drone's flexibility. So far, I have only used a KK 2.1 board as a flight controller which doesn't really have this capability ...
1
vote
1answer
33 views

How does Herelink achieve 20km range with 1080P video streaming quality?

According to the HereLink manual. It uses 2.4ghz frequency for wireless communication and claims video streaming in 1080p up to 20km range. How is this possible? If it can transmit up to 20km then it ...
3
votes
5answers
279 views

Is FPV a specific category of drones or just a way to use them?

I'm approaching the drone world and I'm studying the basics before buying the first one or attending a course. I would use them for personal pleasure, not for work nor for racing or group flying. But ...
3
votes
0answers
21 views

How to calculate frictional losses in convergent nozzles and convergent-divergent nozzles?

I have searched up a lot of articles and papers relating the subject but not satisfied with the results. Most of them are showing the losses in pipes which I already know from Darcy-Wiesbach equations ...
0
votes
0answers
23 views

What is the power draw for an Mini FPV camera?

I have a Runcam 4 and a A198 FPV camera. I am actually using them to install in a model railroad. How do I determine the amps or watts that the camera requires? I assume that most of the drone ...
3
votes
1answer
40 views

Help getting this flight controller to work with this receiever

I am working on building a drone. I have the DJI NAZA M LITE flight controller, and this receiver. The pinout for the battery and ESCS is pretty clear, but I'm not sure how I should go about ...
5
votes
1answer
399 views

How come the DJI Fly App is NOT in Google Play Store?

Just got a DJI Mini 2, and followed the instructions to get it up and flying, but the required DJI Fly App was not in Google Play Store. I downloaded it, installed it, and successfully flew with it. ...
3
votes
0answers
29 views

How can I read the recording status of a Runcam Split 4 through UART?

I am working on a project where I need to interface with a Runcam Split 4 using its UART protocol. You can find the protocol documentation here I am able to get info about the device features through ...
5
votes
1answer
34 views

Help on get the information about mavic3

I search on dji website about the mavic 3 spaces and there few things that I don’t understand What is the real range of the mavic 3 on the spaces write max fly distance is 30km but the range is 15 km ...
1
vote
1answer
33 views

Where to find the recievers modules on dji series?

I'm searching for the receiver model inside the next small drones: dji air 2S dji mavic 2 pro dji mavic 2 Zoom dji mini 2 dji mavic 3 I searched all over the internet but did not find the receiver ...
4
votes
2answers
36 views

DJI spreading wings 900 propeller size

I need to know the size (length and chord) of the UAV spreading wings s900 propeller. It should be 1552/1552R and the only info I was able to find was this size: 15×5.2inch (see here). I found that ...
4
votes
1answer
54 views

Contra-rotating coaxial shrouded fans: design guidelines

I want to design and make my own Dronut-like drone. The size will be limited by my LCD printer. My goals are: quiet. 2) safe. 3) duration. I'd like to use a pair of HBR turbofan style fans to ...
2
votes
1answer
71 views

Does DJI Mini [2] have the same geofencing as other DJI drones?

DJI is infamous for its overzealous geofencing. This feature prevents or seriously hinders operation, sometimes in areas where there are no legal restrictions. Now, in most jurisdictions, sub-250g ...
3
votes
1answer
85 views

Does the Mavic Mini 2 drone support the DJI FPV controller and goggles?

The drone: Official Website | Where I'm buying it from I am looking for a drone for a class at school, but we need one under 250 grams, and that supports First Person View, so that we can use VR ...
6
votes
2answers
91 views

Is there a simulator in which you can test your own helicopter model?

I am currently trying to make a model helicopter. I have calculated lift generated by the blades and upward acceleration of the helicopter. However, I amn't very sure if my helicopter will fly or not. ...
2
votes
0answers
45 views

How to communicate with about 1 km range?

How can I set up a communication link between some drones that can be 1 km away from each other? The communication should be done by broadcast (Ad Hoc) and not point to point. What type of transmitter/...
3
votes
1answer
95 views

How to calculate how much lift to be generated for my helicopter to takeoff?

I am currently making a model helicopter. I wanted to know how fast must my blades spin so that it can takeoff. I guess, for that I would need to calculate lift produced right? Can someone help me ...
3
votes
1answer
52 views

Brushless Motor not spinning when controlling with Raspberry Pi, PWM and ESC

I'm currently working on a drone which is controlled by a Raspberry Pi. I try to control the motors by using PWM on the connected ESCs, which is described in many guides and forums. For that I use the ...
3
votes
1answer
31 views

How to couple panel method velocities with boundary layer equations to obtain viscous pressure and lift coefficient?

I have calculated CP(pressure coefficient) and CL(Lift coefficient) for a NACA2412 airfoil using the panel method but as it only allows us to calculate the same for inviscid flow, I could not get the ...
3
votes
1answer
55 views

Motor doesn't work, ESC doesn't calibrate

After I figured out why SAFE never turned off, now I'm stuck because my motor won't spin and I can't enter calibration mode of the ESC. After turning on the plane, it does three startup beeps in ...
6
votes
2answers
77 views

Question about Mars Ingenuity helicopter's wide-chord blades

I marveled at the two flight videos today on YouTube by Perseverance helicopter flights during Ingenuity mission. Got me thinking. Why aren’t the helicopter blades wider? I would like to think that in ...
2
votes
1answer
45 views

Drone Suggestion Model - Linux Based

I need to buy a drone like the 3DR Solo that can allow me to program it and work with different features. I mean, I would like to have a drone where I can access towards SSH, I can deploy C scripts (i....
3
votes
1answer
50 views

Can I use a MJX bugs 5w battery and/or charger for the MJX Bugs 5w 4k (upgraded version)?

I am wondering if I can use the MJX bugs 5w battery for its upgraded version (MJX bugs 5w 4k) as it seems they both are the same dimensions, so it can slide into the drone. Also, I am wondering if I ...
-3
votes
1answer
50 views

what kind of propellers should I use for my rc b29?

I want to make a remote controlled b 29 super fortress out of balsa wood. The estimate weight of the aircraft is about 10 pounds. What are the best propellers to use since I would like to fly at at ...
1
vote
2answers
46 views

Can an extra 300s glide upside down and backward?

I had a crasy idea; here it is. Let's say I'm flying an 80" Extra 300s with a .6 nitro motor in it. I then go into a dive straight down with full throttle util my plane is 30 ft. off the ...
0
votes
1answer
47 views

Connecting 2 Pixhawks to 1 Raspberry Pi

I want to connect my Raspberry pi 4 to two Pixhawks such that when I'm using one other will be in sleep mode. One way of doing it is by assigning address to an individual and then switching. But I'm ...
5
votes
1answer
142 views

FC won't go into boot mode

I can't get to get my FC (a JHE MCU F722 BT dual) into boot mode. I have tried: under Linux (pop-os 21.04) and win 10 pressing the boot button when powering it up via USB entering DFU mode via ...
4
votes
1answer
28 views

Can't disable SAFE or change SAFE mode

I was gifted one of these (with souped-up motor and ESC) and was delighted when I discovered it could be bound to my Spektrum DXS transmitter. However, the receiver is stuck in beginner mode. I've ...
5
votes
1answer
39 views

What battery/motor setup will replace this 1980s vintage glow engine?

I have a sport model (RCM Terrier, balsa/plywood construction covered with Monokote or Econokote stick/shrink film) that I built in 1984, and it has somehow come through multiple moves apparently ...
4
votes
1answer
62 views

Choosing ESCs for an Autonomous Drone

I'm about to build my first drone. I chose the PixHawk 4 with PX4 as a flight controller and the Raspberry Pi Model 3B as the companion computer. I am not sure about the ESCs yet. So far I'm ...
4
votes
2answers
64 views

How to limit the power of the brushless motor

I need to limit the power of my brushless motor at 700 Watts. How I can do it? I dont have a fix motor or propeller, for any configuration the max consumed power need to be less or equal 700W. The max ...
3
votes
0answers
43 views

Where to find dimensions for DJI Phantom 3 gimbal?

Basically I am trying to make my own drone with carbon fiber rods and 3d printed connectors. I have selected a battery, motors, propellers, etc. I also have a DJI phantom 3 drone which I would like to ...
5
votes
2answers
446 views

How should I interpret the exif data from an image taken by a drone?

Each aerial image taken by a drone has some exif data. What does that exif data signify? There are latitude / longitude and altitude values mentioned. What does this data signify? Does this signify ...
3
votes
1answer
32 views

Lipo battery with an ESC and a BLDC motor

I'm not sure if I can connect four brushless dc motors to my Lipo battery. I don't know how to calculate it. The brushless motor I have is the Turnigy L2210C-1200 brushless motor (150w) and the Lipo ...
1
vote
2answers
84 views

What are the best resources online and offline to learn about drones?

I'm looking to buy a drone, just as a hobby and take some aerial photos. But I know zilch about them. Is there any place on the net or even some offline source such as a book which teaches me all ...
6
votes
1answer
337 views

How close can a drone be to a wind turbine in Germany?

I operate a rather professional fixed wing drone which requires pre-flight planning via an app and doesn't support direct control besides instant flight abortion and "return to landing zone" ...
3
votes
1answer
110 views

FPV Angle Mix Mode

I’m curious to know what a good starting camera angle would be on whoops when enabling fpv angle mix mode in BetaFlight. Also if it’s not too much to ask, what would the steps be to put that mode on a ...
2
votes
1answer
33 views

Is it safe/good to store a Mavic Mini 2 LiPo battery at ~18% for an unplanned next flight?

They say it is best to store at ~60% but I personally don't want to spend CC for charging it first and then discharging my battery. Note: someone said, I can just charge the battery and unplug the ...
4
votes
1answer
61 views

Quiet, dockable drone for patrolling and remote communication

Never had a drone before but now I want one which needs to meet this very specific set of requirements: Dockable. I want to setup a drone dock on the roof of a building, where the drone will reside ...
5
votes
1answer
56 views

What are the requirements to fly a Mavic Mini 2 drone in the Czech Republic, Austria, and Hungary?

I am traveling to Prague, Vienna, Salzburg and Budapest. Can I fly Mavic air mini2 without permit? It's not for commercial use. Czech Republic CAA is in Czech language which I cannot read.

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