Questions tagged [unmanned-aerial-vehicle]

An unmanned aerial vehicle (UAV), commonly known as a drone, is an aircraft without a human pilot on board. Its flight is controlled either autonomously by computers in the vehicle or under the remote control of a pilot on the ground or in another vehicle.

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Why do so many UAVS use a V-tail configuration?

How different is V-tail from a conventional tail in the perspective of aerodynamics & flight dynamics of aircraft? I have seen that many UAVs, like the General Atomics MQ1 Predator, LSI Amber, ...
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22 votes
12 answers
6k views

Why aren't swarms of cheap consumer-level drones a viable anti-aircraft tactic?

In the Russia/Ukraine war, when it comes to cheap, consumer-level drones, I've only heard of them used for reconnaisance, not for anti-aircraft defence. But given that: In civil aviation, a single ...
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3 votes
1 answer
139 views

Restricted airspace and lower limits

I am a new UAS pilot who will be flying agricultural fields. Naturally, my first flight location is close to a restricted airspace for military practice. I want to make sure I my flights are compliant....
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Calculating forces on a hexacopter which create yaw

I'm trying to design a mathematical model of a hexacopter, and while researching the mechanics of the object I could not figure out how to calculate the total torque on the drone in 'Z' axis that ...
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2 votes
4 answers
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What is the decrease in power when a drone is in descent?

For a quad-copter, or a fixed-wing drone with quad-rotor formation, how much would the power of the motor decrease when a constant speed descent is needed to bring the drone back to the ground? Does ...
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5 votes
1 answer
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What rules exist that state what a competent authority do with a runaway drone?

In this AAIB accident investigation, published in 2021, a rather terrifying event is described in which a 3m long, 95 kg remote-control nearly-home-built drone is flown at speeds of up to 25 m/s below ...
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Is there a classification/group for UAVs with certain specs?

Is there a classification (like a name for UAVs that have max cruise velocity of 350km/hr) for UAVs please? So based on specs like range, velocity and altitude for example? Thanks, any resources with ...
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How was the AeroVironment Helios able to fly to the edge of space at no more than 23.5 kn?

The NASA/AeroVironment Helios holds the FAI record for the highest sustained horizontal flight at 96,900 ft (29.5 km) MSL. It reportedly spent more than 40 min above 96,000 ft. It could fly no faster ...
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2 votes
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In the US, what is the process for filing a DROTAM? [closed]

For drone pilots in the US, what is the process for filing a DROTAM?
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What’s the most efficient way to earn the drone / 107 qualification for a retired ATP Pilot?

As an ATP-rated retired pilot (30 years experience) and a recreational drone pilot, I'd like to get the type for UAD (drones). I am not 61.56 current. What would be the most time- and cost-efficient ...
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How does drone reliance on GPS make it 'semi-stealthy'?

I saw this on CNN today. For months, US intelligence and military personnel in Iraq have been raising alarms about the risk to American forces from these newer, more sophisticated Iranian-made drones....
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What are these components in a DHS/CBP Predator drone?

In the following diagram showing the "DHS/CBP UAS Platform Configuration", what are these components and what are they used for? PPDM SPMA RCM RVT encoder
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4 votes
0 answers
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Can we bring a rotorcraft like Ingenuity to an altitude of the same pressure as the one on Mars?

At Perseverance's and Ingenuity's location the atmospheric pressure is about 750 Pa (0.11 psi). On Earth, we find that pressure about 110,000 ft high. If we built a copy of Ingenuity, could we bring ...
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What airfoil is used on the MQ-1B Predator's wing?

There are lot of UAV's in todays world to be re worked on. The General Atomics series of UCAVs is quite remarkable. I have selected MQ-1B Predator UAV, for an geometric analysis project(undergraduate)....
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30 votes
1 answer
5k views

How do airports detect drones?

Recently, there's been a lot of coverage in the news of drones disturbing operations at airports. Do airports have a method to detect drones? If yes, how does it work? If it's still an emerging ...
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1 vote
1 answer
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Is the FAA expected to issue more regulations soon on drone usage in rural areas?

There are exponential increases in funding for small drone startups. When is the next publication period for the FAA to issue regulations on use of small drones in suburban areas?
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1 vote
0 answers
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Question on sUAS course in lieu of knowledge test for Part 61 certificate holders [duplicate]

If I am a PPL already, it appears that you can just take a course and pass a quiz to satisfy requirements for part 107 as such: "If you are a part 61 pilot certificate holder and you have a ...
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4 votes
1 answer
281 views

On the LAANC map for sUAS operations, why does the permitted ceiling drop to zero southeast of KGFL?

Above is a screenshot1 from the LAANC map for obtaining authorization to operate sUAS (model airplanes, "drones", etc), centered on KGFL, which is Floyd Bennett airport near Glens Falls NY. ...
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4 votes
4 answers
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How do I keep the neighboring Remote Control Airfield from flying over my property?

I live in the North Georgia Mountains. The neighboring remote control airfield was put in front of my house where my mountain view is. I have no issue with them flying over their lease, just not over ...
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0 votes
0 answers
39 views

What FAA or other regulations apply to autonomous quadcopters?

I am a software engineer and hobby roboticist and I have just successfully built a quadcopter drone with a full-fledged microcontroller (running firmware that I wrote myself) inside of it, that flies ...
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1 vote
1 answer
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What classification of aerial vehicle would a manned quadcopter or octocopter be?

US here, if it makes a difference (w.r.t. FAA regulation, etc.). There's a new upcoming class of aerial vehicles, similar to drones, however they are gigantic and they are manned -- that is, manned (...
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0 votes
4 answers
372 views

Why would a turboprop be better than an internal combustion engine for a UAV?

Let us consider a UAV, long endurance high altitude (~26,000ft). Why would a user (most probably military) go for a turboprop rather than an internal combustion engine?
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2 votes
1 answer
121 views

Yaw rate of a multi-rotor

Is there any type of relation that limits yaw rate of a multi-rotor (i.e quadcopter)? Something like this relation for fixed wing aircraft: $R = \frac{v^2}{g \tan(b)}$, where $R$ is the minimum ...
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3 votes
1 answer
2k views

Is it possible to get permission to fly in the DCA “no drone” area?

The entire immediate Washington D.C. area is in a “no drone zone”, in a 15 mile radius from DCA. Are there ways to get an exemption for activities such as film making, property inspections, etc?
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-5 votes
1 answer
209 views

Can I fly this six motor drone? [closed]

My body weight; 70kg, Drone weight; 50kg, Props length 0.7m, 6 motors (2hp each), Total weight 120kg, Total horsepower 12, Each motor runs 3000rpm, Please can I fly it. Thanks!!! drawing of the drone
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2 votes
1 answer
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Is hybrid propulsion widely used by UAVs?

Is it common to have hybrid propulsion in UAVs used for terrain mapping with long endurance, short range and altitude? Is the technology and research mature enough to make hybrid propulsion? ...
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3 answers
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Can the lift equation be used for the Ingenuity Mars Helicopter?

I am currently working on a basic simulation of the Mars Helicopter Ingenuity, and I am having trouble interpreting the outputs I am receiving from the lift equation. The equation reads as follows: L =...
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What regulations govern UAV lights in Australia?

I'm a member of a student aviation club at my university, and we're working on a UAV. The club member working on our drone's power supply system has designed a system that uses externally-visible LED ...
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1 vote
1 answer
158 views

Why aren't we using drone blimp/hybird airship for delivery? [duplicate]

Currently, the heaviest weight a commercial drone (the type that delivers Amazon package, not the type that delivers tons of stuff) can lift is 4.5kg with a 30-45 minute battery life. A drone blimp/...
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3 answers
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Single vs Twin motor for an electric RC airplane

I'm designing a fixed wing UAV for a project. I need an airplane that can fly for at least 200 minutes. Obviously, it means a big battery and thus a lot of added weight. I've been debating whether or ...
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0 votes
1 answer
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How to use a set of Pressure Transducer to mimic pitot static tube for VTOL vertical airspeed indicator?

May i know if i have 3 pressure transducer, 1 facing upwards and the other downwards to measure the vertical velocity of a VTOL (Vertical Takeoff and Landing aircraft) and another 1 on the nose of the ...
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3 votes
2 answers
553 views

How should a private pilot renew their part 107 certificate?

I got a Part 107 (Commercial Drone) Certificate by passing the test more than two years ago, so it's expired now. I just became a private pilot, and I know that private pilots can get a Part 107 ...
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1 vote
1 answer
685 views

Can drones/UAVs fly over international waters without being subject to the FAA's regulations?

Can UAVs or drones (consumer/commercial scale) operate over international waters (12 miles out from the shore) without being regulated by the FAA? Just wondering if companies can do things like ...
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1 vote
2 answers
446 views

For electric aircraft, is MTOW = Empty weight + Maximum payload?

Electric aircrafts and most drones have simple powertrains, and their weight does not vary along the flight. After reviewing this thread I assume that: MTOW = Empty weight (batteries incl) + max ...
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Can a quadcopter fly stable while its all 4 motors from different manufacturers?

What if we used 4 motors which all are from different manufacturers? Will it fly/hover ? All 4 brushless motors have same kv and dimensions. Like 2204 2300kv .
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6 votes
1 answer
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Why does Google's Wing drone have dimples?

The question What operational aspects of Alphabet's Wing drone delivery service will be the same as that of an airline? includes a cropped photo of a google drone from FAA Certifies Google's Wing ...
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4 votes
1 answer
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How does a remote pilot land a fixed-wing UAV?

How does a remote pilot land a big fixed wing UAV, whose takeoff weight could be several tons and have to land at a airport with runways? I saw in the TV, these big UAV normally has on-board cameras ...
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What is the current regulatory progress regarding autonomous aircraft carrying passengers?

Are there any lobbying groups working towards this? Has there been any word whatsoever from the FAA on this topic yet?
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3 votes
1 answer
647 views

What indication has the FAA given that phrases like "surface area of Class E airspace designated for an airport" do or don't include E4 "extensions"?

This question pertains to the airspace of the USA. The dashed magenta shape on the sectional chart around KGUP depicts the horizontal extent of the Class-E-to-surface at KGUP. Inside this perimeter, ...
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1 vote
1 answer
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Why do most commercial solid-state Inertial Measurement Units (IMUs) measure angular rate and not angular acceleration?

The vast majority of MEMS-based IMUs are formed by an accelerometer and a gyroscope, providing linear acceleration and angular rate measurements respectively. However, having available the angular ...
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4 votes
1 answer
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How to calculate the number of blades?

Inspired by building a new drone, I got lost in curiosity. What if I have a fixed length of rotor blades and a target amount of lift I want to, well, lift. How do you calculate the number of blades? ...
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1 answer
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What are some alternate methods of communication with aircraft (specifically small drones)?

I've been thinking about his alot but I've yet to find an answer. Most of the time drones use radio, wi-fi, GPS and Bluetooth signals to communicate with their controllers but all of these methods ...
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6 votes
1 answer
502 views

Why do UCAV/UAV designs mostly use lambda wings instead of pure delta wings?

Why do recent UCAV/UAV designs mostly use lambda wings (such as Taranis and Dassault nEUROn) instead of pure delta/diamond wings (such as X-47A Pegasus and Lockheed D-21)? As for stealth ...
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Calculating Lift of a closed-wing drone

A group of students and I are designing a theoretical closed-wing drone and need to calculate lift based on the NASA lift equation. We've designed fixed-wing aircraft before and when it came to ...
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2 votes
1 answer
157 views

Solutions to improve the aerodynamic behavior of a UAV

So I'm working at a project of a UAV with the follow characteristics: Rectangular planform Conventional tail The fuselage is just a metal/aluminum rod So we need to improve its aerodynamic behavior/...
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0 votes
1 answer
535 views

How to calculate aerodynamic efficiency at minimum power conditions?

The drag polar of a propeller driven aircraft is $C_{D}=0.039+0.071 C_L^2$. The lift curve slope of the wing ($C_{L_\alpha}$) is 0.09/deg and zero lift angle ($\alpha_{L=0})= -1.5^o$. Stall angle of ...
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7 votes
1 answer
150 views

Would using a drone to pay for something count as commercial use?

If I were a drone hobbyist, and I flew a drone over to someone to give them money in exchange for something, would that count as commercial use and therefore be illegal? Here’s an example scenario: I’...
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5 votes
2 answers
740 views

What kind of drone might be able to fly so high that it "operate(s) outside national boundaries"?

In the question What is a propellant burner trailer? I mention that CNN and NPR have pointed out that the US president recently tweeted a surveillance photo of an explosion of a rocket on a launch ...
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7 votes
1 answer
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Are there any plans to make the QF-16 into a drone for actual combat missions, or a fully autonomous fighter?

It appears to a naive layman like myself that the QF-16 is an excellent platform to use for remote controlled missions akin to that of other drones. Except that the F-16 appears to have a broader ...
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1 vote
1 answer
259 views

Do airplanes or helicopters ever fly at night using only white navigation lights?

I've been trying to figure out if airplanes or helicopters ever fly at night with only white Nav Lights. See this UAV video taken on July 12, 2015, 05:38 AM Pacific time in San Francisco, CA, USA.
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