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

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, Class E airspace extends all the way down to the ...
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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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108 views

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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Does DO 178C require a complexity test and compliance to specific values? [duplicate]

Assuming we are developing airborne software to be compliant with DO 178C, and assuming we were allocated a DAL B, does DO 178C require a complexity analysis test and compliance to specific values for ...
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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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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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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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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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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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552 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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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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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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How do you communicate with a military drone operator over radio?

This article (and other similar ones) states: In remarks at the White House on Thursday, US President Donald Trump said the drone had flown to within 1,000 metres of the USS Boxer and had ignored "...
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What's the minimum number of sensors for a hobby GPS waypoint-following UAV?

I would like to develop my own guidance, navigation and control (GN&C) flight software on a Raspberry Pi, for a small hobby fixed-wing UAV. From a physical standpoint, what is the minimum set of ...
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Cross a barrier with a drone [closed]

How fast does a multi-copter drone need to fly in order to freefall on the other side of a highway if: Drone weight - 15kg, 20kg Highway width - 70 ft altitude above ground - 200 ft, 300 ft, ...
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Definition of Critical Part in type certification process

first time here :) I'm part of the team at Flytrex (flytrex.com) and we're working with the Aircraft Certification Office to certify one of the first UAS systems (drones) under new initiative to ...
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where can i get a aviation map of korea with the moes, and highways and vectors

ive been searching for a aviation map of South Korea and cant find anyone that sells it. does anyone know where I can find one for flight planning
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At what altitude does a wing become useless? [duplicate]

At what speed or altitude does an aircraft become more efficient as a rocket then a plane using thrust vectoring instead of the wings to steer? At what altitude did the flight control surfaces of the ...
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As a drone hobbyist, is flying below the listed FAA UAS ceiling a violation of controlled airspace?

FAA (emphasis mine): In Class B, Class C, or Class D airspace [controlled airspace] or within the lateral boundaries of the surface area of Class E airspace designated for an airport, the ...
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Are there any operational, combat capable multicopter drones (as of 2019)?

Are there any small operational military drones with any form of weapons system on board, as of 2019? I'm basically referring to a more powerful, more sophisticated and refined version of something ...
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Would this be a dangerous impeller to use for a drone?

I am considering using a 3D printer to make unconventional impellers for a custom-made drone that I am planning to build. I am concerned that these plastic impellers may explode if their motors' RPMs ...
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How can air launched UAV's be decelerated?

I am working on disaster relief drones for a college project. I was thinking about having multiple set of drones launched from an aerial vehicle over the disaster prone area. That's when I came across ...
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184 views

What are all the US airports where E4 “extensions” change to E2 and become part of a larger E2 “surface area” when the tower closes for the night?

Of all the US airports with part-time control towers and with E4 "extensions", in which cases are the airspace definitions written so that the E4 "extensions" change to E2 and become part of a larger ...
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109 views

What's the smallest 3-blade propeller for this motor? [closed]

I've got a 15470 brushless 35kw motor from China How do I find the smallest 3-blade propeller I can use for this motor? Here are it's specs, Max Power: 35KW Max Amp: 400A Max RPM: 8500 Max Volt: 120v ...
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3answers
358 views

May the Class-E-to-surface airspace near Eagle County Regional airport (KEGE) and Marshall AAF (KFRI) be ignored when the tower is open?

May the Class-E-to-surface designation indicated by the dashed magenta lines outside the dashed blue circle at Eagle County Regional airport (KEGE) be ignored when the tower is open? Likewise at ...
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328 views

Why does the European MALE RPAS UAV use twin engines?

I don't know why the European MALE RPS UAV designers chose to use twin engines? I know two engines are expensive but add safety... Does choice is to obtain mass flow @ Medium altitude(low air ...
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What operational aspects of Alphabet's Wing drone delivery service will be the same as that of an airline?

The NPR News article and podcast FAA Certifies Google's Wing Drone Delivery Company To Operate As An Airline begins with: The Federal Aviation Administration has certified Alphabet's Wing Aviation ...
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1answer
156 views

Why do drones near airports necessitate cancelling flights?

From Wikipedia's page on the Gatwick drone incident: Between 19 and 21 December 2018, hundreds of flights were cancelled at Gatwick Airport near London, England, following reports of drone ...
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What does the “remote control” for a QF-4 look like?

As I understand it a QF-4 is a Phantom which is converted to a remotely controlled plane for use in weapons testing. (Apparently in non-destructive runs, a pilot is still on board for safety, ...
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1answer
135 views

Quadcopter: would putting 3 blades on the same level and the other blade below the first three work?

Most quadcopters have their propeller blades all on the same level, or in some cases, a pair of blades placed a little above the other pair. However, I was wondering if three propellers of a ...
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74 views

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

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 ...
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227 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?
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how are UAV systems (aircraft+ground facilities) fitted with landing aid system?

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 ...
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304 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 ...
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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.
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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 ...
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119 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
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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 ...
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220 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 ...
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361 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 ...
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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 ...
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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 ...
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1answer
111 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 ...
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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 ...
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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 ...

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