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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Hexacopter Vn diagram/ flight envelope/ operational envelope

I am currently intern at a company. They are making agriculture hexacopter, now there is a confusion that does the hexacopter or multicopter have a V n diagram if yes how to make one what's the ...
Karandeep Singh's user avatar
15 votes
9 answers
7k views

Why are there still fighter pilots in cockpits?

Way back in 2010, Elon Musk said, The fighter jet era has passed. And he seems to have a point. Although fully autonomous fighter planes are some way off (see above linked article), why doesn't ...
YouDontSay's user avatar
1 vote
1 answer
109 views

Can a tail-sitter drone like the XFY-1 Pogo aircraft have any advantage over a classic quadrocopter

I looked at a few rc models of the xfy-1 pogo plane and wondered why there weren't more drones in this setup, some seemed very agile. I think this concept can be refined. of course, the contra-...
San's user avatar
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1 vote
0 answers
55 views

Which type of wing would be a better option for fixed-wing UAV? Mid or low?

In the context of VTOL hybrid Fixed-wing tiltrotor UAV, for the operation that would require low weight and more maneuverability for agricultural crop surveying, which option would be a good choice, ...
Tejas Raysad's user avatar
2 votes
0 answers
60 views

How do AeroVironment's Switchblades steer their flight? [duplicate]

I've recently been to a defense expo and saw a previewed Switchblade 300 at the AeroVironment booth. It got me questioning how the Swtichblade, and similar fold-out drones steer their flight. The ...
noise noise's user avatar
0 votes
0 answers
72 views

Deriving Accurate Exit air velocity of rotor

My goal is to derive the equation for exit air velocity as a function of: Pitch angle RPM Rotor Radius Constants like ρ Assumptions: Vc is relative velocity of air upstream, and is = 0 Inflow is ...
Luke-McDevitt's user avatar
11 votes
3 answers
3k views

With existing tech and knowledge of meteorology, can aircraft be designed to reliably improve their range or loiter using updrafts to gain altitude?

Just what the question says. I want to know if aircrafts' range, loiter time, or other measures of merit can be dramatically and reliably increased using our current understanding of meteorology and ...
Sorghum's user avatar
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2 votes
2 answers
711 views

Finding longitude/latitude of a aircraft

I have been scratching my head for a long time on this one so any help is apperciated. How would I find longitude and latitude points of a UAV given this: True Airspeed Roll rate, pitch rate, and yaw ...
ash_'s user avatar
  • 21
1 vote
1 answer
71 views

How to calculate the amount of differential cable delay between a four port directional antenna and a single port Omni directional antenna in TCAS II?

I want to select the amount of differential cable delay between the top (4-port directional) antenna and the bottom (1-port Omni-directional) antenna in the TCAS II RBP-7G connector pin. In the ACSS ...
Vignesh V's user avatar
-1 votes
1 answer
68 views

How to calculate the Traffic Advisory (TA) range limit above the maximum altitude limit (take 16000 ft) of an aircraft?

Let us consider an aircraft(A) with 16000 ft maximum altitude limit. Above which it cannot achieve 0.25 G vertical acceleration with 1500 FPM. Now, my question is if there is an aircraft(B) flying in ...
Vignesh V's user avatar
1 vote
2 answers
142 views

Telling an unmanned aircraft from its flight path

I'm not a hardcore fan of aircraft - I just like to know what is flying overhead and why... Some days I hear this loud annoying droning sound coming from the sky - it's usually a military unmanned ...
Stephen Strange's user avatar
1 vote
1 answer
87 views

What are the key differentiating factors between the flight control systems employed in unmanned drones and those utilized in piloted aerial vehicles?

"I've come across open-source projects like ArduPilot that are commonly used with microcontrollers like Pixhawk for unmanned aircraft. However, I'm unsure whether these systems can be adapted for ...
Rohit Anand's user avatar
0 votes
2 answers
80 views

Are there equations to match power required to mass for rotorcraft?

Is there an equation (or table or whatever) to determine what power is required to fly certain mass? Probably there will be a bunch of nuances, but at least some sort of rule of thumb probably exists.
TQQQ's user avatar
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1 answer
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Has putting car tires over wings ever been used to protect the aircraft from airborne attack?

Recently Ukrainian bloggers have published videos, where Russians have placed the car tires on the wings of they parked strategic bombers (Tu-95), most likely to provide some protection against drones ...
h22's user avatar
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How long does it take the Predator UAV to reach cruise altitude?

For applications such as UAVs, especially military ones like the Predators and Reapers, do the same regulations as light aircraft apply due to their structure? Or, does the absence of a human operator ...
Sharva Potdar's user avatar
3 votes
1 answer
231 views

What would the effect be of flap deployment on a UAV such as the Reaper or Predator?

I've read answers that said that the climb performance is usually worse with flaps extended, and the pilots would, if they could, just retract them and get into a clean config as soon as possible. ...
Sharva Potdar's user avatar
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69 views

How to find the equations used in an N2 diagram?

I am currently pursuing my research internship whose aim is to validate the airframe design estimation by FastUAV, an optimization framework (written in OpenMDAO) specifically tailored to unmanned ...
Miriam Scarano's user avatar
2 votes
0 answers
55 views

Unmanned aerial vehicles communication link: frequency/spectrum?

I am studying airborne platform: HAP - high altitude platform LAP- low altitude platform UAV - unmanned aerial vehicle ITU gives frequency allocation bands for link between ground and HAP/LAP/UAV, ...
Aid22's user avatar
  • 21
0 votes
2 answers
191 views

Why was US-made Reaper drone downed but not Byraktar TB2?

Russian Su-27s used fuel dumping techniques on US-made MQ-9 Reaper (YouTube) and Turkish Byraktar TB2 (YouTube). MQ-9 Reaper plunged into the Black Sea, but TB2 didn't. Why was that?
user366312's user avatar
1 vote
3 answers
2k views

Why is there no video of the drone propellor strike by Russia

I've seen lots of videos of the Russian aircraft flying near the US drone, but I've yet to see a video of the reported collision with the drone's propellor. Is there no video of the strike? If not, ...
Mat's user avatar
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60 votes
5 answers
11k views

Why would a fighter drop fuel into a drone? [closed]

According to the BBC: A feed from a camera fitted under the fuselage of the surveillance drone shows a Russian SU-27 making two extremely close passes while releasing, what appears to be, fuel as it ...
Elerium115's user avatar
0 votes
2 answers
163 views

Would I need a drone license if the drone is flown by ai and not a remote?

I heard of some AI flown UAV's and was wondering. if I made my own AI flown drone/plane would I need a drone license? (Assuming I would use it for commercial purposes and not just for fun).
Pink Pit's user avatar
3 votes
2 answers
195 views

Why does the V-Bat not counter-rotate?

V-Bat is a VTOL aircraft built by a company called Martin UAV. It seems to have a single pusher propeller. But then why does it not counter-rotate to balance the rotation of the propeller? Any clear ...
Atharva's user avatar
  • 33
3 votes
1 answer
123 views

Payload capacity of a quadcopter/helicopter with increasing altitude

I am trying to create a simplified model of a heavy-lift drone payload at different altitude during hover mode. I tried to derive it simply by considering that the thrust, $T$ is equal to the weight ...
Khalid Owl Walid's user avatar
0 votes
2 answers
235 views

Why does the P-175 polecat have two separate air intakes instead of 1 like most other UAVs?

I understand that the P-175 polecat has two engines which normally would mean one air intake for each engine, however other aircraft have used 1 air intake structure for two separate engines such as ...
Yourhelpismuchapprecciated's user avatar
7 votes
3 answers
1k views

Expected behaviour in Linkloss scenarios - UAVs

Imagine a remoted piloted aircraft like MQ-9 being controlled by pilot on the ground. I was wondering what is the expected behaviour of the aircraft when the connection with the pilot is lost? Does ...
GInoRu00's user avatar
2 votes
1 answer
156 views

Does a non-current private pilot need to renew his license to obtain a Part 107 (Remote Pilot) certification?

I am a non current private pilot (haven't flown for about 15 years) that need a 107 license for work to fly DJI drones. my employer is not going to pay around $1,000 to get me current again (it's been ...
razorseal's user avatar
0 votes
1 answer
248 views

What are this sensor especially those at tips?

This is an image of an RQ-7 B UAV what are those sensors marked in red circles.
rajtaj's user avatar
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2 votes
2 answers
110 views

How is pitch changed and lift generated in QNET VTOL (Vertical Take off & Landing)?

I am confused how QNET VTOL (Vertical Take off & Landing) works, especially how pitch is changed and lift is generated. I share a link of a relevant YouTube video and I am also sharing snaps of ...
DSP_CS's user avatar
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19 votes
4 answers
7k views

What is the largest aircraft ever successfully flown and landed with no pilot on board?

I'm not sure if this belongs here or on the drone site. What is the largest aircraft (not spacecraft) that has completed an entire flight, including takeoff and no- or minimal-damage landing, either ...
Someone's user avatar
  • 7,025
-2 votes
1 answer
126 views

Countries that have unmanned and manned fighter teaming projects [closed]

I have been wondering what countries currently have military programs related to teams of manned and unmanned fighter aircraft? For instance, I know that the US has several programs related to this ...
Chubaka's user avatar
5 votes
5 answers
6k views

Can you put a propeller on the back of a plane, and have it go forward?

So, I was thinking about how drones work, and I can't figure out how drones with propellers at the rear of the drone can still go forward. I'm not that experienced in aviation so if this is a basic ...
floppa fan's user avatar
3 votes
0 answers
101 views

Drone regulations - understanding how to figure out

I'll preface my question by mentioning that, while this might not be the strictly on-topic, I think this community is the best that can explain the flight zones and the flight regulations. I own a ...
Paul92's user avatar
  • 131
12 votes
4 answers
5k views

Hovering for free

I'm thinking about light solar drones, and started wondering if you could hover while not using any power by flying downwind. Something similar to how prey birds hover while tracking the ground. It ...
William Brochmann's user avatar
8 votes
2 answers
2k views

Could ducted propellers improve efficiency in small drones?

I have seen that a new electric airplane design has decided to a choose ducted propeller design somewhat similar to the one of jet engines, explaining this design choice with the fact the ducted ...
AndreaF's user avatar
  • 181
9 votes
2 answers
2k views

How AeroVironment's Switchblades steer their flight?

I'm very intrigued with how AeroVironment Switchblades: SW-300, and SW-600, steer their flight. There are plenty of images and animations and to my observation, none of the Switchblades have ailerons, ...
armando's user avatar
  • 91
3 votes
1 answer
1k views

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, ...
Kushal Galipally's user avatar
23 votes
12 answers
8k 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 ...
Eugene Osovetsky's user avatar
3 votes
1 answer
236 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....
ralpers's user avatar
  • 33
1 vote
1 answer
142 views

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 ...
Kuba's user avatar
  • 11
2 votes
4 answers
338 views

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 ...
Faito Dayo's user avatar
4 votes
1 answer
284 views

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 ...
Landak's user avatar
  • 1,868
-2 votes
1 answer
82 views

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 ...
Red's user avatar
  • 1
1 vote
1 answer
187 views

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 ...
Giovanni's user avatar
2 votes
0 answers
235 views

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?
mongo's user avatar
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2 votes
1 answer
84 views

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 ...
Joe B.'s user avatar
  • 21
7 votes
1 answer
2k views

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....
Cascabel_StandWithUkraine_'s user avatar
0 votes
1 answer
839 views

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
SRIMON .S DILEEP's user avatar
5 votes
1 answer
424 views

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 ...
Giovanni's user avatar
  • 193
1 vote
1 answer
1k views

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)....
Gabriel Belmont's user avatar

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