Questions tagged [design]

Use in questions asking about why the materials or components of drones/model aircraft are constructed in a certain way.

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When evaluating the weight of a multirotor, is there a standard way that the components are grouped?

Let's say we can all agree on that the frame and landing gear are one group, would you group the motors, props, ESC, and Batteries together, or split them out as four separate items? Does the wiring ...
4
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3answers
59 views

How useful is knowing the torque generated by a motor prop combination?

I'm designing a series of small drones for use in a swarm configuration in combination with terrestrial / marine / submarine robots. As part of the process, I've designed a test rig to measure the ...
4
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2answers
68 views

How to reduce propeller tip losses?

I have heard that tip losses in propellers can occur when a propeller is highly loaded (when there is a much higher pressure under the prop blade than above it). This can happen with drones that fly ...
13
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2answers
2k views

Flying a UAV with a banner?

I want to attach a banner to a UAV like this: I have two questions: Firstly, is it even possible to fly a UAV like this with the banner visible? What sort of design considerations would I have to ...
13
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2answers
2k views

Is it better to have a bottom heavy quadcopter or a top heavy quadcopter when it comes to a quadcopter stability?

Does it matter where the battery is mounted? Or is it best to have the centre of gravity aligned with the propeller plane where the thrust is generated?
4
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1answer
44 views

Where can I find a computational fluid dynamics model of a full quadcopter or multirotor?

I have searched for any computerized graphics visualization of a quadcopter or other multirotor and all I am able to find are a very few models of a single propeller. (Simscale has an example of a ...
4
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2answers
88 views

What impact does a shroud have on the torque produced by the prop(s) of a multirotor that incorporates a properly designed shouded propeller?

Based on the research presented here: "Hover and wind-tunnel testing of shrouded rotors for improved micro air vehicle design" and other reading that translates similarly well-designed shroud and ...
10
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1answer
68 views

How to determine the correct specification of servo for a control surface

Servos come in a large range of sizes, torque values, etc. and the servo to use depends on a number of factors such as control surface size, aircraft speed and desired manoeuvrability. While there is ...
8
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2answers
76 views

Calculating the range of an FPV drone

It's been a long time since I studied Electronics and Communications Engineering, but if I recall correctly, it should be possible to calculate an estimate for the range of an FPV drone given the ...
9
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2answers
113 views

Why do a quadcopter's opposite rotors spin in the same direction?

All the quadcopters I've seen have four motors, arranged in a square-like shape. Two of these rotors spin one way, and two of them spin the other way so that the main body of the quadcopter doesn't ...
17
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4answers
469 views

Why do multirotors usually have four propellors?

I've observed that hover-capable drones almost always have four propellers. There are helicopters of course, which have two, but in general, the vast majority of UAVs seem to go with four propellers. ...