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8 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
19 views

What type of charts are on the Remote Pilot exam?

What type of aeronautical charts are on the remote pilot certificate exam? Are they VFR charts?
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0 votes
0 answers
10 views

Connecting a RS232 sensor to the Pixhawk

I have an airspeed sensor that outputs a RS232 signal. This is the sensor: https://www.aeroprobe.com/micro-air-data-system/. I want to connect this sensor to the Pixhawk in order to use the data for ...
2 votes
1 answer
157 views

Would it be problematic to have only on/off throttle control?

On a remote controlled airplane, would it be a problem to only have on/off throttle control and not be able to set a particular throttle level? Would landing be possible?
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0 votes
0 answers
9 views

How do I store a Li-ion pouch battery without any discharger or balancer?

I have a single-cell 3.7V 900 mAh Li-ion pouch battery and a 7.4V 30c 2s 850Mah Li-ion pouch battery. I want to store these two batteries (the manufacturer suggests I should store the 2s pack at 3.8V)....
1 vote
1 answer
18 views

Can you still fly under the exemption for recreational flyers after obtaining a remote pilot certificate?

I have two drones. One has a camera, and I might use it commercially at some point. It could carry a Remote ID transmitter. The other does not have a camera, and has no use other than recreational ...
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3 votes
1 answer
28 views

Do FAA regulations apply indoors?

If I fly my drone around inside my house, do FAA regulations apply? (Ignore the fact that they will almost certainly not care.)
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1 vote
0 answers
21 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 ...
1 vote
0 answers
40 views

Tail sizing for small aircraft [Drones]

hope you all are having a lovely day. I am a novice designing a 3D printed, fixed wing drone as a personal project. The mission objective is maximum endurance (and a decent range too). It has a MTOW ...
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0 votes
2 answers
82 views

How can I calculate the weight needed in the nose?

I have built this plane: But the nose cone is too light. I have tried adding different objects in the front but each thing was either too light or too heavy. How can I calculate the weight needed in ...
0 votes
1 answer
10 views

A2212 1000kv Brushless motor keep beeping and twitching

I have bought an A2212 1000Kv brushless motor and a 30A ESC. I power this setup with a 7.4v 2s 30c 800mah LiPo battery. For the signal, I am using a DIY Arduino receiver and transmitter. When I test ...
2 votes
1 answer
47 views

Can a A2212/6T ,2200Kv motor with 8” inch propeller can lift an rc plane?

I have 4 motors installed in my rc Aircraft, A2212/6T 2200kv BLDC with 8” propeller can it fly a rc air craft weigh 3000gms, if not directly from ground , if i throw it in the air like gliders will it ...
2 votes
1 answer
22 views

How do I find the current my motor and speed controller will draw?

I am currently building an rc aircraft. I need to achieve approximately 20 minutes of flight time. I'm using a 1600w 320kv motor and a 80A speed controller. For 20 minutes of flight time at 80 draw I ...
1 vote
0 answers
22 views

What battery can I use for 1000kv brushless motor, that will be the cheapest?

I am using a 10 x 4.5 propeller for my A2212/13T 1000KV brushless motor with a 30A ESC. What battery will I need that will be cheap to power my motor alongside three 9-gram servos? Flight time is not ...
0 votes
1 answer
26 views

Why wont my 1000kv brushless motor work with a 10x4.5 propeller?

When I run my A2212/13T 1000Kv brushless motor by itself with 11.1 or 7.4 volts(i am using 2 lipo 3.7volts 900mah and a li-ion 3.7v 900mah in series that I connected with alligator clips) it runs fine....
0 votes
1 answer
24 views

Can I put lipo and li-ion batteries in series

I have two 3.7 volt 900 mAh LiPo battery, which I connected in series to provide 7.4 volts. But now I want 11.1 volts. Instead of buying another LiPo battery, am I able to put these two LiPo batteries ...
0 votes
0 answers
8 views

Main parameters of slow moving model aircraft

For example, 1.5 meters balsa model aircraft designed for the speed like 10 meters per second. It has a glider - wings, body, tail and the "load" - motor, battery, electronics, wires, ...
1 vote
1 answer
24 views

How to add servo control on my fpv drone to drop a parachute or other object

I have a DARWINFPV BETAFLIGHT F4 FC 50A 2-6S BLHELI_S 4IN1 DSHOT600 ESC STACK. I'm looking to add on a servo that i can control while flying so that i can drop objects, move a camera around, deploy a ...
0 votes
1 answer
14 views

Holy stone HS130D PCB part details

Any idea where to get individual PCB parts info for fixing a Holystone HS130D PCB. It looks like two adjacent units in PCB have heated up and melted together causing one motor to keep running without ...
2 votes
0 answers
29 views

Control drone from PC

I’m a programmer and novice in 'copters. I want to control my handmade drone from PC. (Use Python script to change yaw, roll, and pitch in real-time as if it can be controller using transmitter’s ...
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3 votes
0 answers
24 views

What electric starter(s) are compatible with the RCGF 120cc engine?

I plan on flying the RCGF 120cc engine, however, I noticed the owner's manual does not recommend any sort of electric starter and I have been having trouble finding one compatible with it.
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2 votes
1 answer
22 views

Would appreciate help! What is wrong with the ESC?

Hear the beep when I connect a battery and when I connect a battery and the FC has voltage... Sounds like there is a voltage drop...but could it also be a new noise? https://drive.google.com/file/d/...
3 votes
1 answer
38 views

Error in the explanation of Ingenuity: The Mars Helicopter by NASA members?

I was watching this video by Veritasium on Youtube, where he talks with NASA engineers about the Mars helicopter. At the attached timestamp they talk about how a completely overlapping rotor ...
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3 votes
0 answers
23 views

Can you connect 2 2L gas cans in series?

I plan on using 2 2000ml containers, can they be connected in series to the carburetor? Link https://flight-model.com/products/1pc-round-plastic-fuel-tank-250mm-500mm-1000mm-2000mm-for-rc-airplane-...
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1 vote
1 answer
28 views

Would the dle 55RA be enough to power my paramotor(ducted)? [closed]

I plan on using the dle 55ra engine to produce 5hp at 8,500 rpm. I am using it in a paramotor, and to save space I am considering using a ducted propeller similar to the Fulcrum power pod. The duct ...
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1 vote
0 answers
12 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 & ...
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0 votes
0 answers
51 views

Can the CV code shown in this video can be used for fixed wing plane?

https://youtu.be/uzrugbQCO64 This is video mentioned. Its a DIY object tracking uav. Here used is a quadcopter can it be used for fixed wing plane. In this case it is quadcopter. Code only command the ...
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1 vote
1 answer
45 views

Does a brushless motor ESC need thicker input wires than output wires

For this question, I have my own opinion and want to know whether it's correct or not. We know that ESC use pwm to control speed. For long range fixed wing at cruise speed, ESC may work at a ...
0 votes
0 answers
19 views

Nazgul Evoque 6s vista/polar ; FC replacement and OSD question

Thanks for the grammar and spelling check its has been a long night and considering I am not a native speaker, I won't meddle (sp?) in the future... As for my answers, I was providing additional ...
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2 votes
0 answers
23 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 ...
3 votes
2 answers
61 views

Where can I see restricted areas for flying?

I am based in Miami and I am aware that some areas do not allow drones such as airports or some public areas. Before I purchase a drone, is there somewhere I can access to see restricted areas? Also, ...
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1 vote
0 answers
15 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 ...
1 vote
1 answer
128 views

How to choose the most efficient (thrust per watt) motor+propeller setup for a drone?

I'm designing a quadcopter weighing around 250 grams, while maintaining a thrust-to-weight ratio of 2:1 Optimize: Maximize the thrust-per-watt for the motor+propeller pair Constraints: weight of each ...
0 votes
1 answer
48 views

How much torque do I need for the servomotor which turns my canard?

I don't know that my question is belong to here or physics community. I desire to make a supersonic micro-jet model plane also powered by model rocket engine to reaches less than Mach 3 and it has a ...
1 vote
2 answers
62 views

How to choose a flight controller for my DIY drone?

I am assembling a drone. So far, I have learned that it is 450mm. I'm using 8 to 12 21700 Li-Ion batteries. When I search for AIO flight controllers, I believe I have to search for "30A" and ...
0 votes
0 answers
14 views

Autel Robotics EVO II Pro RTK 6K Drone

In "Autel Robotics EVO II Pro RTK 6K Drone"- can anyone kindly tell me which base station they use? And whether the data they produce are geotagged with DGPS?
1 vote
1 answer
44 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 ...
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0 votes
2 answers
66 views

Could plane models propellers be used effectively for quadcopters?

There are CW & CCW propellers specific for moltirotor and other propellers as the following APC E style, distributed as propeller specific for planes. I'm wondering if such plane propellers ...
  • 195
2 votes
1 answer
45 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 ...
  • 195
1 vote
0 answers
33 views

Rain proofing a drone design - What about the motors?

I'm working with custom build autonomous drones. Recently, I've started thinking about making the design rain proof. There are a lot of waterproof RTF designs out there and SO also has a thread on ...
3 votes
1 answer
70 views

What is an Ultimate Air Trap (UAT)?

I am confused about what an Ultimate Air Trap is. I understand somewhat that its task is to remove the air bubbles in the fuel feed to an engine. But how does it work? How is it different from a ...
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1 vote
0 answers
20 views

What is an Ultimate Air Trap (UAT)? [duplicate]

I am confused about what an Ultimate Air Trap is. I understand somewhat that its task is to remove the air bubbles in the fuel feed to an engine. But how does it work? How is it different from a ...
  • 85
0 votes
1 answer
77 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 ...
1 vote
1 answer
15 views

Can I use a reversable drone BL_Heli ESC directly from a PWM receiver?

If I wanted reversable brushless motors in a boat or robotics project, where I don't have a flight controller to handle DSHOT communications, could I use BL_Heli ESCs? Do they still understand PWM ...
0 votes
1 answer
22 views

Problems with drone receiver using BetaFlight

I got some problem when using Betaflight and trying receiver, I am not sure how to fix them😭. First, when I toggle the left stick, the throttler raise so quickly to the limit I set, how can I let it ...
0 votes
3 answers
81 views

Uneven RPM output across motors, how to fix?

After enabling the RPM measurement on a Quad-X craft that flips on takeoff, I see that the front motors (#4 and especially #2) consistently deliver higher RPM for the same throttle input. Here are ...
0 votes
0 answers
27 views

Buzzer constantly beeping

I have a buzzer which is constantly active after enabling bidirectional DSHOT in Betaflight. The motors run fine, but something is obviously wrong and I can't nail down the cause: Soldering defect. ...
0 votes
0 answers
43 views

Blackbox Explorer: "No logs in this file could be parsed successfully"

I have collected some flight logs on the SD card on an OMNIBUSF4SD FC running Betaflight. The loop time is 8kHz and the logging rate is half of that, 4 kHz. However, if I try to open the log files ...
3 votes
1 answer
43 views

How to account for propeller (fixed pitch) in model aircraft performance calculations?

I'm working on performance calculations for a plane I'm building. By setting the sum of my drag formulas (one for the wing, one for the fuselage, both with predicted drag coefficients) equal to the ...
1 vote
3 answers
24 views

Are there any formulas for acceleration to max speed time/distance

I'm working on optimization code for a RC Plane competition. I'm trying to figure out both the distance and the time between when the plane takes off and when it reaches max speed. I already have ...
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