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Results tagged with unmanned-aerial-vehicle
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user 1961
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.
119
votes
Accepted
Why are military drones shaped so strangely?
The whale-shaped forward fuselage covers a parabolic antenna for a high-bandwidth datalink. The operators want to receive the reconnaissance data in real time, and by giving the antenna the best place …
- 237k
24
votes
Accepted
Does the Predator drone's design make a tail strike more likely on takeoff and landing?
The tail arrangement was initially chosen to protect the propeller from touching the ground first. The configuration of what later became the Predator was initially designed to be launched from a subm …
- 237k
24
votes
Accepted
What is the purpose of these odd "control surfaces" on the BAE Taranis?
They look like spoilers but are more precisely called drag rudders. They are not meant to reduce lift like regular spoilers, but increase drag in order to create a yawing moment.
Regular aircraft hav …
- 237k
20
votes
Accepted
How does drone reliance on GPS make it 'semi-stealthy'?
For being remotely controlled, drones need to emit and receive a radio signal. If the outgoing signal contains a video feed, it will be high bandwidth and be like a beacon announcing the location of t …
- 237k
12
votes
What is the largest aircraft ever successfully flown and landed with no pilot on board?
If you go by wingspan, I nominate the Boeing Condor: At 205 ft (62 m) it is in the class of the Boeing 777-300ER or the A340-600, but at less than 10 tons take-off mass it is a minnow compared to them …
- 237k
12
votes
Accepted
With existing tech and knowledge of meteorology, can aircraft be designed to reliably improv...
Thermals are finite. This means they have a useful diameter which is smaller than the diameter of the smallest circle most airplanes can fly. The wing loading of a heavy (= full ballast tanks) glider …
- 237k
11
votes
Can a UAV defend itself?
Short answer: No.
The drone needs sensors, and if the designers were preoccupied with outfitting it for its main mission and did not include anything to detect an incoming threat, a drone is a sittin …
- 237k
11
votes
What is this object that followed me up the street?
This is a quadcopter, so called because it uses four rotors to generate lift. They are now made cheaply in China and can be purchased in most technology-related online shops. They are remotely control …
- 237k
11
votes
Could ducted propellers improve efficiency in small drones?
If the ducted propeller really increases efficiency, we would see more of these
Rhein Flugzeugbau Fanliner (picture source)
and fewer of these:
Socata TB-9 (picture source)
The ducting has benefits …
- 237k
7
votes
How does the control-board on small drones govern their flight?
Maneuverability with this kind of drone comes with their small size and high thrust-to-weight ratio. When you scale such a dynamic system, the time scales with the square root of size, so the smaller …
- 237k
7
votes
Accepted
How do UAV designers improve visual quality without compromising computational efficiency in...
First look at the frequencies involved. If your camera frame shakes so badly that the picture quality suffers visibly, I would suspect that your camera mount has an eigenfrequency close to whatever ca …
- 237k
6
votes
Accepted
How would a low-airspeed fixed-wing drone be designed to reduce effects from gusts and wind ...
First, kudos for the well-researched question! You certainly did your homework before coming here.
As you realized yourself, your requirement is quite contradictory. I also wonder what blimp would be …
- 237k
6
votes
Accepted
Would this be a dangerous impeller to use for a drone?
I know those things as squirrel cage blowers. As the video says, they are a good choice if you want to move a moderate amount of air without exposing rotating blades.
Impeller, by the way, was initia …
- 237k
6
votes
What is the best design for a small flying wing with special flight envelope?
I know, flying wings are cool. But once you have built and flown one, you get a more nuanced view. To find the right configuration, start with a look at your objectives. You want:
excellent performa …
- 237k
5
votes
What exactly is a "drone"?
"Drone" is a very general expression for a wide range of vehicles, and it is mostly used by the press and outsiders. Lately, the word has been picked up by Marketing to give model aircraft a more fanc …
- 237k