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4 votes
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How to determine the minimum thrust to weight ratio for a fixed-wing aircraft?

I'm afraid it's not that simple. As you mention, planes can fly with a fairly low thrust to weight ratio. Obviously gliders can fly with no power at all, so there's no critical lower-limit. The other ...
Robin Bennett's user avatar
4 votes
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Budget drone capable of lifting 0.5 - 1 kg and flying ~2km radius

The flight you describe is 100% illegal in the US requiring 107/commercial license + BVLOS waiver. BVLOS waivers are very rare, 61 issued searching the DB for "107.31" here: https://www.faa....
FunHog.me's user avatar
  • 1,068
4 votes
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Motor size and Kv advice for ZD550?

There are a lot variables when it comes to building your own drone, so there will be a variety of motor sizes and Kvs that will work. I think the recommended motor size for the ZD550 is 3508 (like ...
Jacob B's user avatar
  • 5,792
3 votes
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How does weight factor into legal allowance in Germany?

There's quite a good summary of the rules on the website of the federal transport department (BMVI): https://www.bmvi.de/SharedDocs/DE/Publikationen/LF/flyer-die-neue-drohnen-verordnung.pdf?__blob=...
User that hates AI's user avatar
3 votes
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How to prevent an ESC from overheating?

Under normal conditions operating on the arms of a multirotor, ESC temperature should be well-controlled by the airflow passing over them from the propeller exhaust. It isn't a good sign that your ...
ifconfig's user avatar
  • 6,008
3 votes

How to determine the largest LiPo I can use in a quadcopter?

I've heard that you want to keep your battery weight no heavier than 1/3 your drone weight.
2pacsawyer's user avatar
2 votes

How to prevent an ESC from overheating?

70°C doesn't strike me as "too hot" for a power electronics device. By looking at the new generation of Mosfets used in ESC, I see junction to case thermal resistances around 51°C/W (°C per &...
zet0's user avatar
  • 51
2 votes

How to determine the largest LiPo I can use in a quadcopter?

I don’t think there are diminishing returns, if the propeller+motor+controller efficiency stays the same regardless of overall weight. Imagine a drone where all the weight is in the battery and the ...
Michael's user avatar
  • 121
1 vote

Rewire drone motor

Brushless motors require a controller, because they need power switched between their three wires as they rotate. These are fairly complex devices because they detect the position of the rotor ...
Robin Bennett's user avatar
1 vote

Motor voltage, kv, and battery weight saving

Powering an aircraft comes down to one, relatively simple mathematical concept: Spinning a propeller of a given size at a given RPM requires a given amount of watts (power) input Now we know that ...
Brydon Gibson's user avatar
1 vote

Motor voltage, kv, and battery weight saving

Motors don't really have a voltage limit (until you get to hundreds of volts when the insulation breaks down). What you see in the advert is just a suggestion for where it is likely to work best. You ...
Robin Bennett's user avatar
1 vote

How to determine the largest LiPo I can use in a quadcopter?

This question did not tell us if you are investigating only one change, the battery capacity, to an existing commercial quad, or whether you are designing a new custom quad that is not yet built. ...
HansenJC001's user avatar
1 vote

How to determine the largest LiPo I can use in a quadcopter?

If you're like me and don't want to calculate: stay under 50% of your drones whole weight. Probieren geht über studieren ;) - Trying helps more than calculating
Bastian Springer's user avatar
1 vote
Accepted

How to determine the largest LiPo I can use in a quadcopter?

Short of very complicated maths, here is what I would do, and may very well help you: You need to know the specifications of your motor - how much power do they consume for a given amount of thrust? ...
Drones and Whatnot's user avatar

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