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2
votes
0answers
16 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 ...
6
votes
1answer
123 views

What do the numbers mean on a brushless DC motor?

Brushless DC (BLDC) motors can have a range of numbers on them: A four-digit number (e.g. 2212) A KV number (already explained on this site) A number with N and P (e.g 12N14P) What do they mean?
2
votes
1answer
9 views

Determing the frame's hole mount length, for the right mount size motors

How do you find out the frame's motor mount mm length? And what motors are generally for 3 inch frames and 5 inch frames? Example: 3inch frames are generally for 1206 or 11XX motors? 5inch frame ...
2
votes
1answer
19 views

Drone simulators for designing and flying aircraft?

Is there any free software that can design drones/aircraft and test fly them? Thank you. I’m looking for a software with no controller needed, just to test if the aircraft/drone can hover with ...
4
votes
0answers
12 views

How can I run a 2450KV 2207 motor on 4S with 7” props?

I’m looking to use some spare motors I have to build a 7” rig. The problem is that they are 2450KV, and I don’t want to burn out my other components. As I understand it, if I set a motor output limit ...
7
votes
3answers
365 views

Will LiPo batteries deteriorate outside with the temperature changes due to day-night cycle?

I am new to the hobby and I'm concerned about LiPo batteries. I live in an apartment (this is Europe, blocks of apartments are the norm in my country) so I can not put the batteries in a dedicated ...
2
votes
1answer
17 views

Why do LiPo batteries get puffy?

I have used many liPo batteries with my drones and other RCs over the years and have had a few of them puff up. What are the main reasons that LiPo batteries puff up? And are there ways to avoid LiPo ...
7
votes
1answer
43 views

Grinding sound on FPV motor but no apparent damage

I have been testing a new brushless motor for an RC plane. It is a 2200KV motor controlled by a 30A BLDC ESC. I heard a grinding noise coming from my motor, as demonstrated in the following video: ...
7
votes
1answer
207 views

Holy Stone HS110D Drone PCB Wiring - What does the circled wire in the picture do?

Total drone noob here so please bear with me. I bought my first cheap drone and I crashed it while flying indoor and one of the rotors stopped working so I took it apart to replace the rotor. But then ...
3
votes
1answer
27 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 ...
1
vote
2answers
31 views

When evaluating the weight of a multirotor, is there a standard way that the components are grouped?

Let's say we can all agree on that the frame and landing gear are one group, would you group the motors, props, ESC, and Batteries together, or split them out as four separate items? Does the wiring ...
6
votes
2answers
40 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.)? ...
2
votes
1answer
18 views

How to build a buddy box cable for FlySky FS-i6X RC transmitters?

I have a couple of FlySky FS-i6X RC transmitters that I'd like to use to teach my brother how to fly. I've seen other people use "buddy box" cables that connect two transmitters and allow one person ...
6
votes
2answers
32 views

Does motor KV requirement scale linearly with voltage?

There have been myriad questions regarding motor KV, such as this one. Many of these come close to answering my question, however none have given me a definite answer. If I am picking motors for a ...
4
votes
2answers
179 views

What LiPo C-rating is best for a small 65mm quad?

I have a small 65mm quadcopter which uses 2s batteries. Is there a recommended LiPo C-rating to get for a drone like this? Or is there some way to figure out what C-rating I should get?
3
votes
1answer
29 views

In what direction should I orient the dipole antenna on my 2.4 GHz RC transmitter?

My RC transmitter has a movable antenna that allows me to change its orientation, like this one: In what direction should I point my 2.4 GHz RC transmitter antenna for best range and signal ...
3
votes
1answer
26 views

Do drones with inflight API access for control inputs exist?

I am a software engineer brand new to drones. I want a drone where I have full access to all of the flight controls programmatically. For example, I can run a python script and once executed, it ...
3
votes
1answer
20 views

Can the DJI fpv remote be used with a 2nd radio in a buddybox setup?

I’m trying to introduce my children to fpv. It would be great if there was a way to setup a buddybox that used DJI’s remote as either master or slave. I only have the DJI remote currently, so it would ...
5
votes
1answer
31 views

DJI FPV Goggles Max Power option not available. Location: USA

I have a set of DJI FPV goggles but cannot change the Max Power option. It shows on the menu under the device section but I cannot select it. I am in the USA updated to latest firmware: V01.00.0500 ...
5
votes
2answers
103 views

DIY wireless mesh network to extend drone's operational range

I have stumbled upon this question regarding technology providing longest range for rc controls and would like to ask a related one. Theoretically it should be possible to build a wireless mesh ...
6
votes
1answer
41 views

Can boosting the Caddx vista to 1200mw cause damage to the unit?

What can happen to your Caddx Vista camera if you boost its output to 1200mW? Could it be damaged in any way; including overheating?
2
votes
1answer
21 views

Does FPV transmitter antenna need to match the goggle receiver antenna?

So for a Fatshark, do I need to have both FPV transmitter and receiver antennas to be of the same brand and same specs? What about for a DJI goggle?
5
votes
1answer
43 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 ...
6
votes
2answers
36 views

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

My new dji Mavic Air 2 arrived, but it was not connected to the remote control as it is supposed to be connected upon arrival. I then tried connecting it manually following the on-screen instructions ...
11
votes
4answers
1k views

Do aerodynamics scale for model aircraft?

If I wanted to make a scale model plane that looked like a real aircraft, could I just scale down all of the measurements of the actual aircraft to make a model aircraft with similar flight ...
2
votes
1answer
76 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 ...
4
votes
3answers
59 views

How useful is knowing the torque generated by a motor prop combination?

I'm designing a series of small drones for use in a swarm configuration in combination with terrestrial / marine / submarine robots. As part of the process, I've designed a test rig to measure the ...
3
votes
1answer
63 views

Why is 900 MHz better for long range than 2.4 GHz?

There are various transmitter modules like the FrSky R9M system which operate at around 900MHz rather than the more commonly seen 2.4GHz. Why is 900MHz better for long range drones, and why is 2.4GHz ...
7
votes
1answer
307 views

Does frequently changing the amount of power to a bldc motor wear it out?

If you had a brushless dc motor and kept it running but changing the power input every few seconds/minutes would it wear it out? I ask because for a drone like aircraft I'm designing, making turns ...
4
votes
2answers
25 views

Do propellers at different angles work the same? And do intersecting flows of air work the same?

Say a propeller pushing thrust downwards generates 70 lbs of force. If you tilted the angle of the system to 45 degrees would it generate the same thrust? If you had each rotor angled inwards of a ...
3
votes
0answers
20 views

Does flying a drone close to the ground affect signal quality? [duplicate]

If I were to fly a drone over a large, flat field and there was nothing blocking Line of sight to the drone, would flying at close proximity to the ground impact the FPV video reception? would flying ...
4
votes
2answers
51 views

Do flexible propellers affect multirotor efficiency?

There are a wide variety of materials and methods for making the propellers used on drones. This leads to certain propellers having different characteristics than others. Some propellers are more ...
4
votes
1answer
32 views

Where to find model aircraft with moving parts?

I came across a model F22 raptor here and here but I am looking for a place where I can get one with moving parts, e.g retractable landing gear, canopy and the likes with a sizable scale, maybe 1:48 ...
11
votes
2answers
2k views

Do propellers layered on top of each other have twice the thrust of one propeller?

If you had two of the same propellers layered on top of each other going at the same RPM, with some space in between, would the thrust be double the amount of a single propeller at the same RPM? If ...
1
vote
0answers
24 views

Can I replace the 433mhz modules on my homemade remote controller with a nrf24 transreciever

I built a simple 4 channel 433mhz transmitter and reciever because I can't afford a remote controller, the range is limited to 3 feet and nrf24 transreciever have longer range, so my question is can I ...
4
votes
2answers
68 views

How to reduce propeller tip losses?

I have heard that tip losses in propellers can occur when a propeller is highly loaded (when there is a much higher pressure under the prop blade than above it). This can happen with drones that fly ...
5
votes
1answer
50 views

Does the sharpness of a propeller blade affect efficiency?

Some of the propellers I have used on drones have sharp edges (sharp enough that they have cut me) and others have comparatively dull edges. Does the sharpness of the leading edge of a propeller ...
5
votes
1answer
75 views

How do thrust requirements change as a multirotor leaves ground effect?

Assuming either a quadcopter or a hexacopter, is there any published data on how much more energy is expended to escape the ground effect? Is it a function of the thrust being produced to lift the ...
7
votes
3answers
952 views

When flying FPV with a 5.8ghz video transmitter, is an Amateur Radio License (Ham license) required?

What are the legal requirements I need to know when operating a 5.8ghz video transmitter like the ones often used for flying FPV? Are the rules different around the world? Is a technicians class ...
4
votes
2answers
232 views

How to measure the pitch of a propeller?

I have some random drone propellers which I don't have any information on. I looking to find a way to measure the pitch of the propellers to figure out if they will be well suited to a 5-inch drone I ...
14
votes
3answers
4k 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 ...
4
votes
2answers
66 views

Is there an advantage to having more LiPo cells in a low-power drone?

A major reason that high performance racing or freestyle drones use LiPo batteries with high cell count (6s rather that 3s or 4s) is so that the voltage won't sag as much. This allows high performance ...
3
votes
2answers
49 views

Determining the mAh of 4S battery for a 3 inch drone

I have a 3" drone frame, flight controller that can take 3S or 4S LiPo, and 1507 4200KV motors. How do I find the right capacity of battery to purchase? Should I purchase 4S 850mAh or 4S 1500mAh? And ...
11
votes
5answers
4k 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 ...
2
votes
1answer
47 views

Datasheets for lift of a 27x12x2 inch propeller?

I'm looking to find the amount of lift produced by a 27 inch diameter, 12 inch pitch, two-blade propeller spinning facing the ground. Are there any datasheets that show the amount of lift given at any ...
7
votes
1answer
75 views

At what voltage per cell should I store a LiPo?

Some sources say you should store your batteries at 3.85V per cell, other says it should be 3.7V. My charger (ISDT Q6 Lite) on the "Storage" mode has a thumbs-up mark at 3.7V, probably indicating ...
2
votes
1answer
52 views

How hot is too hot for a VTX?

I have heard that when a VTX gets too hot, it can cause irreversible damage to the VTX. I have sometimes noticed that the VTX on my 5-inch drone gets very hot to the touch. How hot is too hot for a ...
5
votes
1answer
29 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 ...
9
votes
4answers
3k views

Disposing of a drone safely

Related: How do I safely dispose of my LiPo batteries? If my drone crashes and I want to dispose of it, how can I do so safely? Is it necessary to disassemble the drone into different parts: motors, ...
3
votes
1answer
62 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 ...

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