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Questions tagged [quadcopters]

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

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1 vote
1 answer
86 views

LiPo battery voltage keeps dropping when connected to PDB

I have an F450 quadcopter frame with the integrated Power Distribution Board. In order to use this feature, I soldered the battery (XT60) and the four ESC (Dean-T) connectors. I tested the continuity ...
0 votes
1 answer
32 views

Claw using brushed ESC in conjunction with brushless ESC on Kakute H7

For a challenge, my club and I have been building a drone with a claw on the bottom. We found a good lightweight claw, but it uses an N20 Geared brushed motor. We have a brushed motor ESC(Quicrun 1625 ...
0 votes
1 answer
48 views

Why are my motors not spinning at the same time although I calibrated them?

I'm currently working on a DIY project to make my own homemade Arduino based quadcopter drone. I have built the structure and have written the program. The drone consists of 1400KV motors, SimonK 30A ...
2 votes
1 answer
395 views

How to calculate the motor size needed from load requirements?

In quadcopter model creation is needed to choose components in order to have enough thrust ratio to grant the hovering plus some extra for movement performances, taking in account other constraints as ...
1 vote
0 answers
14 views

DJI F450 Drone Kit Equivalent

I wanted to buy the DJI F450 Drone Kit, however as it is no longer produced, I want to buy an equivalent. Does anyone know any Pre-soldered drone kit like the DJI F450 that can lift a camera, jetson ...
0 votes
1 answer
407 views

Raspberry Pi 4 between flight controller and receiver

I have TBS Crossfire Micro TX, Nano RX and Raspberry Pi 4, I haven't bought a flight controller yet because I have a problem: Until the drone receives a special command from the transmitter - I ...
0 votes
0 answers
8 views

motor and holybro tekko esc heating issue

I recently started building a quadcopter. I'm using a Hollybro Tekko 4-in-one ESC and Emax motors (EMAX RS2205 2300KV Brushless DC Motor for FPV Racing Drone) - Red Cap (CCW Motor Rotation) X4). In ...
0 votes
0 answers
21 views

PI License Requirement?

I am considering getting into the drone search and rescue industry in the southern California area. Specifically, using thermal drones to look for lost dogs. I stumbled upon a website https://www....
0 votes
0 answers
4 views

Eachine ts215 motors get hot

I bought a Eachine Wizard TS215 5' freestyle drone back in 2020 (now discontinued) that flew perfectly when I bought it. The PID tunning was already set from the factory and everything was running ...
0 votes
1 answer
74 views

Drone is not holding its position

I am working on a quadcopter drone, i am using s500 drone frame, pixhawk 2.4.7 flight controller, dji 2212/920 bldc motor. I am planning to use Raspi-4b to control the drone. But before that, while ...
0 votes
1 answer
28 views

transmitter not connecting in multiwii

i built a drone usiong multiwii controller and uncommented drone x and mpu6050 lines i calibrated the motors using it also but when i operate transmitter using multiwii software the software and drone ...
2 votes
5 answers
289 views

Is it possible to hijack a quadcopter?

Is it possible to hijack a quadcopter? Like an attacker would jam the controller's signals and send his/her own signal to controll the drone. If so, what would be the technical steps?
0 votes
0 answers
11 views

Yaw angle estimation for quadcopters

I have built a quadcopter from scratch and I am at the stage of optimizing the roll, pitch, yaw angles estimation. To this end, I have implemented both Madgwick and Mahony AHRS filter and at the ...
1 vote
0 answers
30 views

Quadcopter configuration with front motors inverted & the rear motors upright

Hello UAV enthusiasts and experts, I am currently working on a quadcopter drone project where we are exploring a unique motor configuration. Specifically, we are considering a hybrid setup where the ...
0 votes
0 answers
42 views

In gyroscopic effect of a drone, why does body frame angular velocity equal to precession angular velocity?

In quadcopter dynamic equations of Newton-Euler formation that I have encountered in all academic publications, torque equation is like this: The cause of gyroscopic effect is from the spinning of ...
0 votes
0 answers
7 views

how to calculate the efficiency of hybrid drones?

I'm looking at this new kind of drones: https://www.xer-tech.com/drones/x8/ And I'm trying to calculate the overall efficiency of the powertrain. The numbers I'm getting don't really match up to the ...
1 vote
2 answers
668 views

How to maximize range with 2212 1400Kv motor and 30A ESC?

Premise, I'm not interested in speed or any type of sporty flight attitude, but only on range maximization I have 30A ESC, 2212 1400Kv motors 180W max with maximum efficiency current in the range ...
0 votes
1 answer
162 views

Why is my drone oscillating on position hold after I move it a few meters?

I have built a 5 inch quadcopter using inav 5, mateksys f722, and M8q-5883 gps. When I enable position hold with gps, the drone is relatively stable, but when I move it a few meters forward, it will ...
0 votes
0 answers
11 views

Multiwii drone not functioning properly

I have used 1800kv motors, Arduino Uno, and Flysky FSI6 transmitter and reciever. This is the code I used for the config.h file: ...
0 votes
0 answers
38 views

Mathematical Model of Drones

I have recently decided to take up a small project at my University involving ML techniques and UAVs. TO get started, I have been looking for mathematical model of UAVs, but a lot of places offer a ...
3 votes
0 answers
14 views

How to "convert" rotoss thrusts to Yaw/Pitch/Roll/Throttle commands

I'm trying to use Flightmare(home) simulator to create a control model using reinforcement learning. The simulator is great, but its environment accepts step command with four values of rotor thrusts ...
0 votes
0 answers
31 views

Is it feasible to enhance Google Maps by incorporating drone imagery, similar to satellite views, for improved visualization of locations?

I've been using Google Maps to scout locations for my drone photography, and it's been incredibly helpful for planning my shots. However, I've been wondering if there's a way for me to contribute more ...
1 vote
0 answers
87 views

How to connect Matek H743 FC to Raspberry Pi 4

I am using INAV firmware with Matek H743 FC. I want to connect FC to Raspberry Pi and read data from lidar/optical flow and GPS sensors. Culd you please provide me with documentation ? I dont know ...
1 vote
0 answers
45 views

Determining Typical Bandwidth for 2.4GHz Radio Control in Drones for FPV Camera Data Transmission

I'm working on a drone project that involves transmitting FPV (First Person View) camera data using a 2.4GHz radio control system. I'm trying to calculate the potential delay in transferring this ...
3 votes
1 answer
474 views

Would it be possible to perform a manual flip with my camera drone?

I have a Snaptain SP510 camera drone. I haven't flown in a while, but I'm interested in getting back to it. After seeing some videos, I began to wonder if I'd be able to perform a manual flip. I know ...
1 vote
0 answers
63 views

Drone that can send live camera footage, GPS coordinates and maybe IMU readings to a remote PC

I need to acquire a drone for my dissertation project. The main requirement is to be able to transmit camera footage to a remote PC for processing. If possible, it would also help to send GPS ...
0 votes
1 answer
49 views

How to calculate total moment around Z-axis when the armlengths are not the same for all motors on a hexacopter?

I am trying to build a mathematical model of a hexacopter where armlengths (distance to the center of mass) are not the same for all motors. I have the datasheet of the motor I plan to use together ...
0 votes
1 answer
101 views

Which DC motors (or others) are good enough for my multi-function drone?

I am planning to make own drone which flies and dives (Some servo motors used to change between fly and dive-mode). But is a normal DC motor or a micro motor good enough (It flies and dives under tens ...
0 votes
1 answer
26 views

MINI F7 (HD +OSD +VTX SWITCH)

How does the switch in the MINI F7 (HD +OSD +VTX SWITCH) flight controller works? I know that you have to connect to pads, but then how can you change, for example, from DJI system to a SBUS input? ...
2 votes
1 answer
474 views

Raspberry pi controlled drone: using raspberry pi as a receiver

I build a drone very similar to the Rotor Riot Cinewhoop, I want to use a Raspberry Pi zero to make the drone fly autonomously. I think that the best idea is to use the Raspberry Pi as a receiver, and ...
1 vote
1 answer
48 views

Software for drone navigation around buildings with 2D or 3D maps available?

When you purchase and use a drone, such as a DJI AGRAS drone, you typically gain access to the DJI software (e.g., DJI SmartFarm App) that provides a bird's-eye view of the map. I am looking for ...
0 votes
1 answer
57 views

DIY or Custom Quadcopter

I want a quadcopter with (2)lb payload capacity, (5)mi range, 30mph min. speed, long-range fpv, waypoints, & ZERO enforced geofencing. I am willing to use/accept any combination of hardware/...
0 votes
1 answer
21 views

Which Drones are most popular for speed, durability , long battery life? [closed]

Also I’m having trouble finding good drones tha can do flips and have good quality of winds resistance and durability, which drone will be worth my time and money ; I have had Dij mavic loved it! But ...
1 vote
0 answers
203 views

Enabling obstacle avoidance in a cheap Chinese drone (E100 Mini Drone)

I bought the E100 Mini Drone, similar to this - and it seems the obstacle avoidance function doesn't work. I can still return it, or keep it for a refund of roughly half the price. I'd keep it, if it ...
0 votes
0 answers
635 views

How to add custom betaflight code to obtain data from I2C device and pass to OSD?

I successfully obtained data from my I2C device in Arduino: ...
2 votes
2 answers
290 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 ...
0 votes
1 answer
64 views

Why is my drone unable to fly?

I have made a drone using Arduino on my own, but unfortunately, it is unable to fly. What I mean by that is that the motors are working perfectly fine, but even after going above 70%, my drone is ...
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?
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 ...
2 votes
0 answers
107 views

Why new/recommended MEMS IMU for AHRS for drones are 6-DOF instead of 9-DOF?

I'm developing an quadcopter as an DIY project. I'm in nascent stage of development. I've just finalized the design/working philosophy. I'm planning to fuse data from 9-DOF (9-Axes) IMU + GNSS + ...
1 vote
1 answer
27 views

How to connect my propellers to my drive shaft? and collet gripping force?

Okay so just to explain my problem. I have a central shaft that has two belt drives connected to it. Each belt goes to a propeller on either side of the drone. I need to connect the shaft that is ...
1 vote
1 answer
39 views

Is my FC for regular rc planes or for drones with multiple props?

recently I decided to build a drone. While I'm learning everything I picked a FC. While researching about the FC I'm not sure if I picked the right one. https://www.alibaba.com/product-detail/2023-New-...
1 vote
0 answers
43 views

FPV system with camera synchronized to IMU

I'm looking for a drone who has an IMU synchronized to a camera. Global shutter would be nice but I would even tolerate rolling shutter if it's time stamps lock to the IMU. Does a hobby priced ...
2 votes
0 answers
47 views

Parrot AR Drone 2.0 full battery shows as empty

A friend of mine gave me a Parrot AR Drone 2 that had been lying unused for a number of years. It was in working condition when he last used it. I had also flown it then. When I got the drone, the ...
1 vote
0 answers
25 views

Effective Area estimation for drag calculation in coaxial quadrotor

I have a coaxial quadrotor with a propellor size of 34 inches & i want to calculate effective rotor area for drag calculation.what will be the area whether it is summation of both upper & ...
1 vote
1 answer
207 views

Do mounting motors at different height each other has any impact on performances?

Multirotor motors are typically mounted on same height. I'm wondering what should I expect if they are mounted at different eights each other. Model will work exactly in the same way as if they are on ...
1 vote
0 answers
23 views

Location of Flight Controller in drone (PX4 specific)

I have a question for experienced users of PX4. Can the flight controller be placed anywhere in the drone, as long as it is pointing in the right direction and the calibration is made in the correct ...
2 votes
1 answer
117 views

Is this quadcopter specification realistic in terms of endurance?

According to the specifications, this quad-copter offers a 90-minute flight time on a 14S-14000mah Li-ion battery. The propellers being used have a 22-inch diameter and have 8-inch blades and the ...
2 votes
2 answers
750 views

Why doesn't my GPS get any satellites?

I got a new GPS for my Matek f405, and after I set it up and got betaflight to recognize it, I can't get any satellites. It's a BEITIAN BN-220T.
5 votes
1 answer
715 views

Control a servo through the flight controller PPM output and a ppm to pwm card

I have a quadcopter on which I want to connect a servo, I bought a ppm to multiple PWM converter to connect on the flight controller PPM output, but I don't find how to tell betaflight to control the ...