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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2answers
79 views

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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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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111 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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153 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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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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What is the general trend of payload fraction for an RC propeller plane?

What is the general trend of payload vs total weight for a radio controlled propeller aircraft? I am simply using this formula: $$Wo = \frac{Wpayload}{(1-((We/Wo)+(Wp/Wo)))}$$ I could get We/Wo (...
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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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1answer
211 views

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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1answer
396 views

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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59 views

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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94 views

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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1answer
99 views

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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1answer
119 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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87 views

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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1answer
128 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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137 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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134 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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2answers
564 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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308 views

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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189 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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226 views

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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1answer
95 views

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, not ...
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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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103 views

where can i get a aviation map of korea with the moes, and highways and vectors [closed]

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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2answers
684 views

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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2answers
365 views

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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67 views

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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989 views

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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3answers
205 views

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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1answer
192 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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1answer
114 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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383 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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2answers
341 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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1answer
141 views

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 to ...
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1answer
159 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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1answer
2k views

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
137 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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1answer
75 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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1answer
239 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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230 views

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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1answer
314 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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0answers
45 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.
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1answer
263 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 ...
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1answer
122 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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3answers
336 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 ...
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1answer
254 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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