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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.
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
1
vote
Is there a benefit to having the motors for a multi-rotor copter on the top vs the bottom of...
@abey is right, but his answer is a little short. Let me give some background.
Propellers work by accelerating air. If you think of a stream tube through which all air flows that will pass through th …
- 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
3
votes
Accepted
What is the effect of moving the centre of gravity ahead or behind the aerodynamic centre fo...
Glider pilots in a competition will try to place the center of gravity at the most rearward position possible, sometimes even further back than permitted. This will make the glider statically unstable …
- 237k
3
votes
What are the physical/aerodynamic implications of designing a prop guard for multirotors?
Remember the drag contribution of a biplane's bracing wires? Now this quadcopter has not one, but two screens in the flow path of the propellers. Each thread of the mesh will act like a small bracing …
- 237k
5
votes
Can radars detect small drones?
Depends entirely on the drones. If the radar system is known and the drone is designed not to be detected by this particular radar system, then the drone can only be detected in exceptional circumstan …
- 237k
1
vote
How to design a propeller for UAV?
Try to get Xrotor to run. It has been written for designing minimum induced loss propellers, and you can input speed, power or thrust and diameter and the program will output the ideal propeller geome …
- 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
5
votes
What are the factors considered while placing a propeller on a plane?
The biggest factor is familiarity: What has worked before?
Other factors are:
Propeller size: Slow-turning propellers driven by powerful engines have a big diameter. This is desirable because it im …
- 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
1
vote
UAV project in aerospace department
One would be the Aurora Flight Sciences Perseus, which started as an unmanned instrument carrier for flights into the south polar vortex, in order to study ozone depletion.
But guess what: Developmen …
- 237k
1
vote
Could the US Air Force ever replace the Thunderbird pilots with drones?
Tight formation flying can be done with stock aircraft and skilled pilots, but drones would need additional sensors and new code in their FCS. Also, you can fly aerobatics even with gliders, but only …
- 237k
3
votes
Is there really anything to be gained by placing the propeller at the top of the vertical st...
To place a heavy mass, part of which is even rotating, on a long, flexible beam is generally not a good idea. The engine mass will reduce the eigenfrequency of the vertical tail, inviting early flutte …
- 237k
5
votes
Accepted
Can small RC aircraft utilize a steel sheet monocoque construction?
Yes, it can be done, but to do it well is a lot of work. You will also need to use a thinner gauge than 1/32" to get the weight down.
Note that one of the very first all-metal aircraft was made of 0. …
- 237k