Stack Exchange Network

Stack Exchange network consists of 175 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.

Visit Stack Exchange

Questions tagged [unmanned-aerial-vehicle]

An unmanned aerial vehicle (UAV), commonly known as 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.

1
vote
1answer
37 views

What is the most critical data to measure for a predictive maintenance model for a drone?

I'm looking at making a predictive maintenance model for a drone (quadcopter mainly but can include others) I'm wondering what is the most common causes of failure due to "overflying". (not including ...
0
votes
1answer
164 views

Is it possible to get permission to fly a quadcopter around the St. Louis Arch for non-professional means

Is it permissible to fly a small quadcopter (<1 kg) around St Louis Arch for non-commercial means? If so what permit/permission is required?
0
votes
2answers
144 views

What landing aid system are used for fixed wing UAV?

For commercial aircraft, precise landing aid systems (ILS, GBAS) are required for autolanding, but these navigation systems are too expensive to be used for UAV operations. However, a lot of UAV OEMs ...
1
vote
1answer
222 views

How much is a QF-16 worth?

Wikipedia lists the prices for F-16 as: F-16A/B: US\$14.6 million (1998)[4] F-16C/D: US\$18.8 million (1998)[4] However, this is clearly outdated, and I suspect that the aircraft in the worst ...
2
votes
0answers
35 views

UAV development platform [closed]

What is UAV development platform? For example, STM UAV, Intel, Parrot and so on. I searched on Google, but couldn't get its exact meaning. Thank you very much.
3
votes
0answers
180 views

Could Falcon 9 fairing become glidable / flyable?

Reading and thinking about this and this questions on space exploration stackexchange, I was wondering if the fairing could shape itself, so that it becomes one stable and steerable gliding element ...
1
vote
1answer
77 views

Can ailerons be used to control yaw and pitch [closed]

Is it possible for an aileron to be used to control the roll, pitch and yaw of a vtol drone
2
votes
3answers
208 views

How could so many drones establish contact with ATC?

India has brought out best set of drone regulations on the basis of No Permission No Take-off (NPNT). But how can the ATC establish contact with so many drones that will be unpredictably asking for ...
0
votes
1answer
155 views

What disadvantages does flying a drone close under a ceiling have?

If I want a drone (quadcopter) to be flying always under a surface and close to this surface (i.e: under a table 5cm away from the surface), which are the disadvantages this would have in the lift ...
8
votes
2answers
321 views

What are the failure mode(s) for flying cars in case of power loss?

There seem to be lots of plans (and even some working prototypes) for various autonomous flying cars and flying taxis. Most of these seem to be based on vertical take-off using some variety of an ...
3
votes
2answers
339 views

Are there any photos or videos of the drones at Gatwick? [closed]

The Gatwick Airport drone incident from 19-21 December 2018 involved "67 reports of drone sightings close to the runway" (Wikipedia). However, police stated there were no photos or videos of the ...
0
votes
4answers
176 views

How does scaling of UAV size impact range?

Lets say you have two autonomous small aircraft, one with a wingspan of 200 cm and one with 400 cm. Both have the same general design. They are both optimized for travel distance on one full tank (gas ...
2
votes
1answer
81 views

What would be a safe minimum vertical separation distance between passenger-carrying multicopter aircraft?

There is increasing talk about employing passenger-carrying multicopters ("taxi drones") to extend urban mobility into the third dimension. These aircraft will have MTOMs in the range of several ...
3
votes
1answer
171 views

Could a quadcopter fly if its propellers were encased in cylindrical tubes?

Picture a standard quadcopter, with regular old propeller guards, which are generally just circles around the propellers. Now, take the propeller guards and stretch them so that they're cylinders ...
0
votes
3answers
247 views

Why hasn't anyone tried making two propellers facing upwards and the other two facing downwards? [closed]

Within a quadcopter, I know usually it's all the propellers facing upwards or all of them facing downwards. Why hasn't anyone tried making two propellers facing upwards and the other two facing ...
0
votes
3answers
174 views

Can quadcopters still fly with propellers at an angle?

Can quadcopters still fly with propellers at an angle? By this I mean like the whole motor mounts will be situated along a certain slope (so as to be neither horizontal nor vertical). UPDATE I meant ...
2
votes
1answer
70 views

quadcopters — should the propellers/motors all be at the same height

In quadcopters (or in any other drones), must the propellers/motors all be at the same height, or can there be symmetric height differences (like for eg, two of the motors at the "back" are elevated ...
-2
votes
2answers
230 views

Why do drones look different from common airplanes? [duplicate]

In this video is shown Top 5 Military Drone. As we may see, the shape looks different than usual airplanes. My concern is especially with the tail. Normally we know that the tail is vertical. But from ...
0
votes
1answer
166 views

What were DJI drones spying on? What data did they capture? [closed]

In late 2017, it was claimed that DJI (a very popular Chinese drone company) was working with the Chinese government to spy on the United States via their drones, or their drone controllers, which are ...
3
votes
1answer
155 views

What are some of the fastest UAVs? How do the pilots ensure that their controls are being transmitted to actions?

I would clarify that the drones I refer to are UAVs that were piloted using a control station. I know many military projects include such capabilities but I want to know how pilots work on such ...
1
vote
2answers
180 views

Must quadcopters have the same propeller sizes?

I was flying quads today and it just suddenly popped up into my mind — do the propellers all have to be the same size in quadcopters? Mine are, but What if two propellers were larger and the other two ...
0
votes
2answers
155 views

What is the feasibility of solar powered drones?

What is the feasibility of solar powered drones? From my understanding, solar panels are becoming more and more efficient, in terms of weight vs energy captured, and in terms of surface area vs energy ...
7
votes
2answers
725 views

Can “a drone” damage the wing of “an aeroplane” to the extent it actually threatens its ability to fly?

I stumbled across this video by the University of Dayton, showcasing the amount of damage a certain type of drone can do to a wing, and they wrote a whole article about it. While most of said article ...
4
votes
1answer
379 views

Where is V15 and how do I find it?

My question: Where is V15 and how do I find it? The question referred to in the practice test: Refer to the figure 21, area 2 below: What is the floor of controlled airspace along V15? The ...
3
votes
2answers
149 views

What kind of cameras are onboard high altitude UAVs that aid in its control?

I ask this question in the context of people flying their drones much higher than the usual hobby planes. Satellite based GPS navigated Autopilots using photogrammetry and/ or military drones. What ...
1
vote
0answers
45 views

Is there any fixed-wing UAV common research model available?

Is there any source of structural specifications data available for a particular fixed-wing UAV, that can be used for comparison with a resulting structure, obtained by a structural optimization ...
0
votes
0answers
77 views

How does the number of blades affect the static thrust of a propeller? [duplicate]

Since I couldn‘t find an answer to this question I thought I‘d ask you guys! By which factor does the thrust of a propeller increase if I double the number of blades, the motor being powerful enough ...
8
votes
1answer
259 views

How do I properly report sighting a drone or hobby UAV to ATC?

How would one go about reporting a drone (hobby UAV) sighted in the airspace of an airport on frequency, specifically to Tower? For example: I am doing patterns around the airport when to the ...
6
votes
2answers
255 views

How to fly a drone in Class D in Italy?

I am traveling for a wedding which will take place in Monza Park, Italy. According to Italian Airspace Pro, the location I would like to fly, the southern half of the park, is technically in Class D ...
3
votes
2answers
152 views

Are there any situations in which drones may legaly fly higher than 400ft?

FAA FAR 107 states, "The maximum allowable altitude is 400 feet above the ground, and higher if your drone remains within 400 feet of a structure." Are there any exceptions to this rule that ...
1
vote
0answers
106 views

Are there any aviation vehicles for Internet service?

Facebook announced on Wednesday (2018.06.27) that it is ending its Aquila drone program after four years of development. Aquila was a high-altitude platform station (HAPS) system designed to deliver ...
0
votes
1answer
231 views

Calculating the maximum altitude of a drone [duplicate]

Is there an equation to find the maximum altitude that a drone or quadcopter can fly to ?
3
votes
2answers
163 views

Is a ground station radio license required for UAS operations in the US?

When conducting UAS operations would a PIC or Spotter be considered a ground station or an air station? The communications would concern a sUAS in the air, but the radio is physically on the ground. ...
1
vote
0answers
91 views

Has the United States started a drone crop spraying program for farmers?

On "NHK World" (2018.06.01), a news segment showed Chinese farmers being taught to use drones to spray chemicals on their crops. The Chinese Government hopes to train all the farmers in an entire ...
2
votes
1answer
144 views

Could an amateur build a full-scale UAV?

FAA section 333 provides permission to fly in the NAS with an airworthiness certificate. Obviously, the design would need to be perfect with extremely redundant control schemes. Going through the red ...
0
votes
3answers
144 views

Are piezoelectric energy harvesters too expensive to be used commercially as a power source in drones or small aircraft?

Piezoelectric energy harvesters can draw energy from the mechanical loads and the vibrations in the fuselage/wings/blades of aircraft. What are the disadvantages of such a system being used as an ...
0
votes
2answers
152 views

Why do we not have autonomous helicopters? [closed]

We see a lot of fixed wing autonomous UAVs. What is preventing this in the case of helicopters? I know the helicopter flight dynamics are complicated. But what exactly is the complication in this ...
2
votes
2answers
222 views

How is notification of UAV flight handled in an area with multiple heliports?

I'm trying to get up to speed on drone licensing and regulation. I'm in central Houston, well away from either of our major airports; but there are literally 50 heliports listed on B4UFLY as being in ...
1
vote
1answer
106 views

Consumer Drones with multi-blade (more than 2) propellers

Maybe unusual question but it's related to Aviation world, even if is more directly related to Drones one. Why almost all consumer drones like DJI's and Yuneec's ones (but it's true also for other ...
2
votes
2answers
146 views

What are the FAA regulations on operating UAVs in class E airspace above FL600?

What are the regulations on flying UAVs (commercial or experimental) above FL600, i.e. in class E airspace above class A? I want to make a HAPS (High Altitude Pseudo Satellite) and operate it in the ...
4
votes
1answer
101 views

Does the ICAO definition of an “aircraft” include a minimum altitude capability?

The German air law includes in their legal definition of a "Luftfahrzeug", which is the equivalent of an aircraft, other devices intended to operate in the airspace if they are capable of being ...
0
votes
1answer
130 views

Precipitation Static on Drone

I read a bit about Precipitation Static buildup on the outside of aircraft flying through dust, rain, or snow. Can this also happen on a small drone and if so, could it interfere with controlling it? ...
7
votes
2answers
563 views

How did Northrop Grumman propose to make the Global Hawk nuclear powered?

Reading further after receiving this answer, I saw the section on nuclear power in the Wikipedia article on the Northrop Grumman RQ-4 Global Hawk: Nuclear power Sandia National Laboratories ...
4
votes
1answer
254 views

What is this NASA UAV, and what is its function?

For the question What's up with the “What's Up at Wallops” app? I was reviewing the What's up at Wallops website and drifted to the launch photos page where I saw this aircraft. I did not find a ...
6
votes
2answers
261 views

How would a low-airspeed fixed-wing drone be designed to reduce effects from gusts and wind shear?

In a story I am working on, the characters need a fixed-wing drone that can rendezvous with a blimp, where by "rendezvous" I mean "come within a very short distance at low relative airspeed". The ...
4
votes
2answers
219 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. ...
2
votes
1answer
99 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 ...
3
votes
1answer
123 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? ...
3
votes
2answers
165 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 ...
0
votes
2answers
141 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 ...