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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4
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2answers
261 views

If the Quadcopter is a MIMO Nonlinear System, How Can it be Controlled using PID? [closed]

I know that it is very common to control quadcopters using PID algorithms. I'm just wondering if it isn't a problem that the system is highly nonlinear as well as having multiple inputs and outputs. ...
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1answer
136 views

How do small unmanned fixed wing aircraft protect themselves against lightning strikes?

I'm asking this question after doing a small research project to see if a small UAS can fly through thunderstorm and trigger lightning strikes. I've googled a bit, and all I've seen are large aircraft ...
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1answer
129 views

Is it practical to use wires to stiffen rotor arms?

(Related to my last question on ducting.) Wires have been used in the past to stabilize wings with a very low weight cost. Could something similar be use to stabilize the arms for a UAV's rotors? ...
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2answers
228 views

Can an ultrasonic sensor mounted on a drone pick up another drone strongly enough to sense and avoid?

I am asking this question to see if mid-air collisions of drones can be prevented using simple analog sensors. Can an ultrasonic sensor mounted on a drone pick up another drone strongly enough to ...
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188 views

Does ducting help to stabilise heavy lift drones?

I'm looking to build a UAV that is extremely stable. It doesn't have to be fast, it doesn't have to be agile, but it will have to carry up to 50lbs (agriculture focused UAV that has to operate for at ...
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3answers
495 views

Can I fly a UAS that weighs more than 55lbs if I'm on private property?

Can I fly a UAS that weighs more than 55 pounds within my own private property if I stay below say, 200 feet? I do not have 333 exemption
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1answer
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How exactly am I supposed to notify ATC when I fly my drone? (UAS)

I recently registered my new 250 class Quadcopter with the FAA under the Part 107 sUAS code. I want to fly within the regulations, and the only one that I'm really unsure about how to abide by is the "...
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1answer
113 views

Are there regulatory bodies for investigating UAV accidents?

Is there an international regulatory body for investigating UAV accidents? Does it exist on any national level?
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How do engineers make sure UAV don't land on their front propeller?

Take, for instance, the following UAV: and suppose you have a payload with a very big volume that fits exactly in the fuselage (and there is no more space), but is extremely light. Thus, the heaviest ...
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1answer
223 views

Does a LSA or better license count for drone use?

I have a FAA private pilot license. Does that allow me the same flight privileges while flying a drone, as a FAA certificated drone pilot?
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1answer
680 views

Does it make sense to use a canard in combination with a conventional aft elevator control surface?

I am designing a UAV and have settled on a canard design. However, I’m curious whether it would be helpful to have a typical horizontal stabilizer behind the wing as well as a canard wing in front of ...
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0answers
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Is there a recommended self-study syllabus or set of books for UAV design? [closed]

I'm junior software engineer (C/C++/Assembly) in a UAV project. After working there for some months I decided that it would be very interesting to start my own project. So, my goal is to design my own ...
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Why do we seldom see small unmanned aircraft with gasoline engines?

Most commercially available FLYING WINGS (RC aircraft or UAVs) are battery powered. Why aren't there more with with gasoline engines? PS: Sorry I edited. The question is specific about flying wings ...
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1answer
128 views

Will manned aircraft have to defend ground targets against unmanned aircraft in the future? [closed]

Given that current Unmanned Combat Aerial Vehicle (UCAV) development is mainly directed towards the strike role, is it most probable that a future manned vs unmanned combat aircraft scenario will ...
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1answer
97 views

How do I determine the maximum thrust that a Tesla powertrain (P100D for example) could produce if attached to a single propeller?

I am theorizing a drone helicopter from a tesla powertrain (P100D). Lets assume the system is theoretically maximized with an optimum propeller (this is what I am currently stuck on). How much thrust ...
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How does a combat aircraft handle the recoil force of a mounted gun?

How is the recoil momentum distributed or countered for smaller aircraft or drones while using a mounted gun? Is there any hydraulic mechanism to counter it and how it is distributed across the entire ...
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1answer
399 views

Could a larger consumer drone “take down” a passenger plane?

As a frequent flier, I'm just concerned about my own safety. Could a larger consumer drone, such as DJI Inspire, (intentionally) "take down" a passenger plane? When I say take down I mean causing ...
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2answers
610 views

Can I fly part 107 in DC SFRA?

I want to fly at 77° 38' and 38° 56'. This is in the DC SFRA, in class B airspace (starting at 1500ft MSL). Can I fly here as a part 107 pilot without asking permission?
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4answers
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Can quadrotors be used for commercial passenger flights? [duplicate]

Recently, I have been conducting research on more efficient means for vertical lift transportation. One direction I was thrown in was the use of a quadrotor system with vector thrust and artificial ...
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3answers
621 views

Where could I find a MATLAB implementation of TCAS algorithms?

Where could I find a MATLAB implementation of TCAS algorithms and simulation? My research work deals with collision avoidance of a multi-UAV scenario in a small airspace.
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3answers
5k views

Why would only a specific model of drone be allowed to fly over crowds?

The FAA allowed CNN to fly a drone over crowds at extremely low altitudes. Its scope is within the UAVs. Only a specific model/type is allowed to operate on these flights. Why is this model of drone ...
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0answers
63 views

Statistically, what are the failure points on sUAS (drone) aircraft?

It is generally recognized that operator error and unairworthy aircraft are the principle factor in sUAS (drone) system failures and accidents. But looking just at the hardware, are there published ...
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1answer
297 views

Do UAVs use ground-based navaids?

When I Googled it seems it is not common to use Vortac like systems from UAVs as a backup to GNSS outages, like in manned aircraft. And also I haven't seen any equipment designed for just UAV ...
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1answer
65 views

Is there a local UAS code database?

Has anyone created (or proposed) a database or clearinghouse of local and state codes, restrictions and prohibitions applicable to UAS?
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1answer
183 views

Are there regulations for unmanned aerial systems avionics?

I know that there are documents such as DO-178B, DO-178C and DO-254 that provide guidance and requirements for the development of avionics in general. In my opinion it's hard to believe that avionics ...
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1answer
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How do I choose the correct airfoil for my UAV project? [closed]

I am not able to decide which airfoil to choose for my UAV project as I am confused. I need to lift at least 10kg of extra payload excluding the weight of the fuselage. I can afford a wingspan of 3m ...
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1answer
204 views

Can a UAV over 55lbs legally fly 20 miles off the US coast?

For US aerospace companies that are developing UAVs heavier than 55lbs for application for the DOD, is it possible to test UAVs over the ocean outside what we would normally consider US controlled ...
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2answers
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How to design the blade twist angle in propeller design?

I am designing a scale propeller for small UAVs and I have computed blade twist distribution for the blade airfoil sections. While I was modelling the propeller I have set the angles to twist about ...
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1answer
3k views

How to locate the coordinates of the Center of Gravity of an airfoil?

I am working on the inertial effects on a variable pitch propeller and i need to define the location of the center of gravity on the airfoil to calculate moments of Inertia and angular momentum. What ...
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1answer
448 views

How to compute quaternions from raw IMU and magnetometer data?

I have raw accelerometer data (w_ib^b) and magnetometer data from a UAV test flight. I would like to reconstruct the quaternion dynamics of the UAV without accumulating error from integration. The ...
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1answer
522 views

How to calculate the performance parameters of an hexacopter (UAV)? [closed]

I need to calculate the performance parameters like cruise speed, endurance, range of my hexacopter but how can I do that! Also, is there a way to obtain motor-propeller performance parameters ...
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2answers
1k views

Can drone with two propellers above one another fly vertically upward without spinning? [duplicate]

Basically, like the propellers setup in this image without the tail end bit: Where the propellers will be spinning in opposite directions. This would, in theory, counteract the angular momentum to a ...
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1answer
716 views

What is this Lockheed Martin plane?

It's on a Lockheed Martin banner showcasing the company's iconic planes. The plane to the left on a crimson background is the U2, and the plane to the right on a blue & tan background is the C130. ...
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1answer
315 views

What are the rules in UK law on carrying dangerous goods on drones?

If I wanted to use an unmanned drone for carrying potentially dangerous cargo like car fuel, what would be the legal requirements of this in the UK? For example, lets say I wanted to carry fuel in ...
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2answers
2k views

What are typical airspeeds and lift coefficients for UAVs at different flight stages?

I've been trying (unsuccessfully) to figure out the relationship between airspeed of a fixed wing UAV at different flight stages. What I mean is, I would like to know the order of airspeeds from ...
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3answers
3k views

Can I choose whether hobbyist or Part 107 rules are more advantageous when flying a UAV for fun?

According to the FAA's UAS getting started page, if I'm flying a drone for fun within a 5 statute mile radius of an airport, I need to contact the airport and any air traffic control tower before ...
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2answers
255 views

Is it possible to control a drone with a link mediated by the cellular phone network?

If that were possible, it would allow an operator to control the drone from a very remote place, and without resorting to satellite radio links, as military drones do...
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5answers
21k views

Why don't drones use ducted fans?

If efficiency of converting battery power to lift or thrust is paramount, why don't drones use shrouded or ducted fans, instead of unshrouded propellers? This is the only image I could find to ...
2
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1answer
414 views

Do all the engines/propellers of a VTOL UAV need to be identical?

I would like to know if VTOL UAVs necessarily need $n$ identical propellers and motors. Have any design solutions considered the possibility of using non identical props? For instance 2 motors of type ...
9
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1answer
969 views

Which countries (if any) allow beyond-line-of-sight drone use?

I was recently thinking about starting up a non-profit that would use large drones (full scale aircraft, not those dinky quadcopters) to deliver humanitarian aid to difficult locations. It was shot ...
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2answers
613 views

How can I consider a UAV thrust power for wind effects?

Sorry that I can't write English well. I was wondering how can I consider a UAV thrust power for wind effects. Assuming a wind velocity of -7 m/s, uav velocity of 10m/s and the stall speed is 10 m/s....
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1answer
229 views

Why aren't AMA certified radio-control club sites shown on aeronautical charts?

All this drone business wound up affecting us R/C fliers that fly only at local verified club sites. I wrote (told) the FAA that our local AMA R/C flying fields are constantly having "our" flight ...
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2answers
151 views

Does object mass have a significant bearing on wind interference?

I'm learning to fly RC quadcopters, and before I go outside with an expensive, possibly dangerous (if it were out of control and hit something) large unit, I've decided to practice flying for a while ...
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1answer
297 views

Can I fly a quadcopter over 50m above a property I don't own according to the UK's Dronecode?

I have a question about the law on flying quadcopters equipped with a camera in the UK. The dronesafe.uk website states that drones are not to be flown within 50m of any property or people that you do ...
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1answer
385 views

What permits are needed to operate a human-flying drone in the United States?

Casey in Finland. If Casey Neistat were to be flown with the human-flying drone in the United States, what licenses / permits would be required from the FAA to make it legal? All aircraft categories ...
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2answers
606 views

Why does the Grumman Bat feature inverted winglets?

I've been fiddling around with trying to make a blended wing body aircraft. While modelling, I heard from someone that the design reminded them of the Swift Killer Bee (now Grumman Bat). One distinct ...
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1answer
184 views

Can a small UAV restart its engine in mid-flight?

Is it possible for a small UAV, say a small piston-engine aircraft with a low windmilling effect, to restart its engine in mid-flight following an engine shutoff?
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0answers
2k views

Where can we fly a drone in Paris?

I'm wandering if I can fly my Phantom 4 Pro in Paris. What are the restrictions? If it's not allowed, can I get an official authorization as I'm an experienced drone operator?
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2answers
239 views

How do UAV designers improve visual quality without compromising computational efficiency in mini UAVs?

I'm designing an Unmanned Aerial Vehicle(UAV) similar in size to the RQ 11B Raven. This UAV can carry color and infrared cameras to capture outside scenes in real-time. The quality of imagery that ...
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0answers
301 views

What is the take off and landing performance of the MQ-9?

At maximum takeoff weight (listed on wikipedia as 10,494 lb (4,760 kg), 11,700 pounds (5,300 kg) with upgraded landing gear), what is the minimum runway distance required (not including safety margin) ...